Structure of Fmoc-Orn(Aloc)-OH
CAS No.: 147290-11-7
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| CAS No. : | 147290-11-7 |
| Formula : | C24H26N2O6 |
| M.W : | 438.47 |
| SMILES Code : | O=C(O)[C@@H](NC(OCC1C2=C(C3=C1C=CC=C3)C=CC=C2)=O)CCCNC(OCC=C)=O |
| MDL No. : | MFCD00798637 |
| InChI Key : | RXLIOYNXBHZZBI-NRFANRHFSA-N |
| Pubchem ID : | 2756120 |
| GHS Pictogram: |
|
| Signal Word: | Warning |
| Hazard Statements: | H302-H315-H319-H335 |
| Precautionary Statements: | P261-P305+P351+P338 |
| Num. heavy atoms | 32 |
| Num. arom. heavy atoms | 12 |
| Fraction Csp3 | 0.29 |
| Num. rotatable bonds | 14 |
| Num. H-bond acceptors | 6.0 |
| Num. H-bond donors | 3.0 |
| Molar Refractivity | 118.02 |
| TPSA ? Topological Polar Surface Area: Calculated from |
113.96 Ų |
| Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
2.96 |
| Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
3.76 |
| Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
3.67 |
| Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
2.32 |
| Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
3.29 |
| Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
3.2 |
| Log S (ESOL):? ESOL: Topological method implemented from |
-4.28 |
| Solubility | 0.023 mg/ml ; 0.0000524 mol/l |
| Class? Solubility class: Log S scale |
Moderately soluble |
| Log S (Ali)? Ali: Topological method implemented from |
-5.85 |
| Solubility | 0.000625 mg/ml ; 0.00000143 mol/l |
| Class? Solubility class: Log S scale |
Moderately soluble |
| Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-6.22 |
| Solubility | 0.000266 mg/ml ; 0.000000607 mol/l |
| Class? Solubility class: Log S scale |
Poorly soluble |
| GI absorption? Gatrointestinal absorption: according to the white of the BOILED-Egg |
High |
| BBB permeant? BBB permeation: according to the yolk of the BOILED-Egg |
No |
| P-gp substrate? P-glycoprotein substrate: SVM model built on 1033 molecules (training set) |
Yes |
| CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) |
Yes |
| CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) |
No |
| CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) |
Yes |
| CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) |
No |
| CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) |
Yes |
| Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-6.31 cm/s |
| Lipinski? Lipinski (Pfizer) filter: implemented from |
0.0 |
| Ghose? Ghose filter: implemented from |
None |
| Veber? Veber (GSK) filter: implemented from |
1.0 |
| Egan? Egan (Pharmacia) filter: implemented from |
0.0 |
| Muegge? Muegge (Bayer) filter: implemented from |
0.0 |
| Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat |
0.56 |
| PAINS? Pan Assay Interference Structures: implemented from |
0.0 alert |
| Brenk? Structural Alert: implemented from |
2.0 alert: heavy_metal |
| Leadlikeness? Leadlikeness: implemented from |
No; 1 violation:MW<3.0 |
| Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
4.25 |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

[ 35661-40-6 ]
[ 71989-14-5 ]
[ 143824-78-6 ]
[ 147290-11-7 ]

[ 50-00-0 ]
[ 622-58-2 ]
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[ 1476-23-9 ]
[ 143824-78-6 ]
[ 147290-11-7 ]
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[ 71989-14-5 ]
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[ 133464-46-7 ]
[ 147290-11-7 ]


| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 95% | With sodium hydrogencarbonate; In water; acetone; at 20℃; for 12h; | General procedure: Compound 5 (35.2 g, 0.135 mol) was added to a three-necked flask.Acetone (300 mL), water (300 mL),Sodium bicarbonate (22.7 g, 0.27 mol) and Fmoc-OSu (45.5 g, 0.135 mol) were then added.The reaction solution was stirred at room temperature for 12 hours.Petroleum ether extraction (500 mL3);The aqueous phase was acidified to pH 3 with 1N hydrochloric acid and extracted with ethyl acetate (500 mL EtOAc).The organic phases were combined and washed with saturated brine (500 mL).Dry over sodium sulfate and filter. Evaporate some of the ethyl acetate,Adding petroleum ether crystalline compound 6(N-fluorenylmethoxycarbonyl-N'-tert-butoxycarbonyl-homolysine)(57.3 g, yield 88%, HPLC purity:98.1%, ee: 99%). |
| C. SYNTHESIS OF FMOC-ORN(ALOC)-OH. This amino acid derivative was prepared in the manner described above for lysine. Orn(AlOC)-OH . Ornithine hydrochloride [60 g; 0.375 moles] was dissolved in 800 mL of water and 9 g of NaOH was added. CuSO4 [47 g; 0.1875 moles] was added to this solution, whereupon the mixture became deep blue in color; it was stirred until all solids had dissolved. Next, 100 g of NaHCO3 was added, followed by allyl chloroformate [56.8 g; 0.4125 moles) in 300 mL of dioxane. The mixture bubbled and was stirred overnight. A sky blue solid was collected on a paper filter, and suspended in 2 L of hot water. H2S was bubbled through for 3 hours, and the black suspension was filtered and allowed to stand for 24 hours. The resulting yellow solution was concentrated to 500 mL and chilled overnight. White crystals were obtained and collected and washed with cold water. The mother liquor was further concentrated, yielding a second crop of crystals. Both batches appeared identical by TLC analysis (solvent system of ethyl acetate: pyridine: water: acetic acid, 35:20:11:6, vol/vol). The yield was 41.9 g (51.5% from Orn-HCl), mp 260C (decomposed). The product was analyzed by NMR and compositional analysis; results are shown below. 1H NMR (200 MHz, D 2 O) ppm : 6.0 - 5.7 (m) 1 H; 5.3 - 5.0 (m) 2 H; 4.5 - 4.4, (d) J = 5 Hz, 2 H; 3.7 - 3.5 (t) J = 7 Hz, 1 H; 3.2 - 3.0 (t) J = 6 Hz, 2 H; 1.9 - 1.6 (m) 2 H; 1.6 - 1.3 (m) 2 H. Analysis calculated for C8H16N2O4: C, 49.99. H, 7.45. N, 12.95. Analysis found: C, 50.09. H, 7.56. N, 13.14. |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| With benzotriazol-1-ol; diisopropyl-carbodiimide; In N,N-dimethyl-formamide; | Compound 1 was synthesized bysolid-phase synthesis with Fmoc chemistry.14 Fmoc protected ornithine(Fmoc-Orn(alloc)-OH) was assembled on Rink AmideMBHA resin as shown in Fig. S1 (Supplementary data). The allocdeprotection of the resin bound ornithine was carried out by thefollowing literature procedure.15 4-Carboxyphenyl boronic acidpinacol ester was coupled with the side chain of ornithine on theresin by the following procedure. 4-Carboxyphenyl boronic acidpinacolester (75 mg, 0.3 mmol, 3 equiv, HOBt (40 mg, 0.3 mmol,3 equiv) and DIC (47 mL, 0.3 mmol, 3 equiv) in DMF (3 mL) weremixed for 15 min and added into the solution containing the resin.The resulting solution was stirred for 4 h at room temperature.Fmoc group was deprotected from the resin bound peptide inpresence of piperidine. After deprotection of Fmoc group, couplingof 1-pyreneacetic acid was performed by the following procedure.Pyrene acetic acid (78 mg, 0.3 mmol, 3 equiv), HOBt (40 mg,0.3 mmol, 3 equiv) and DIC (47 mL, 0.3 mmol, 3 equiv) in DMF (3 mL)were stirred for 15 min and added into the solution of the resinbound ornithine (200 mg, 0.1 mmol), and kept for 4 h at roomtemperature. Deprotection of pinacol ester and cleavage from theresin was achieved by treatment with a mixture of TFA/H2O (95:5,v/v) at room temperature for 4 h. After cleavage of the product fromresin, compound 1 was triturated with diethyl ether chilled at20 C and then centrifuged at 3000 rpm for 10 min at 10 C. Thecrude product was purified by HPLC with a Vydac C18 column usinga water (0.1% TFA)-Acetonitrile (0.1% TFA) gradient to give the 80%of final product. The successful synthesis was confirmed by ESImass spectrometry (platform II, micromass, Manchester, UK) andits homogeneity (>95%) was confirmed by reversed phase analyticalHPLC with C18 column. |
[ 7697-26-9 ]
[ 35737-10-1 ]
[ 76608-15-6 ]
[ 160751-44-0 ]

[ 198544-42-2 ]
[ 147290-11-7 ]
[ 618-51-9 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 4% | General procedure: General Procedure A for Rink Amide Resin Activation. Rink amide resin (Advanced ChemTech) was mixed with DCM (1 mL per 100 mg resin) and then shaken for 30 minutes. After activation, resin was washed three times with DMF (1 mL per 100 mg resin). [0079] General Procedure B for the Removal of the Fmoc Group from the Rink Amide Resin. Rink amide resin was mixed with 20% piperidine in DMF (1 mL per 100 mg resin) and shaken for 30 minutes, and then washed with DMF (1 mL per 100 mg resin, 3 times), isopropanol (1 mL per 100 mg resin, 3 times), and DCM (1 mL per 100 mg resin, 3 times) sequentially. The removal of the Fmoc group was confirmed by the ninhydrin test. [0080] General Procedure C for the Removal the Alloc Group from the Rink Amide Resin. The resin (200 mg) was washed with DCM (2 mL, 5 times) and shaken under 2 overnight with a solution of tetrakis(triphenylphosphine)palladium(0) (10 mg), AcOH (0.5 mL), and NMM (0.2 mL) in DCM (10 mL). The resin was then washed with DMF (2 mL, 3 times), isopropanol (2 mL, 3 times), and DCM (2 mL, 3 times). The removal of the Alloc group was confirmed by the ninhydrin test. [0081 ] General Procedure D for the Removal the Mtt Group from the Rink Amide Resin. The resin was washed with DCM (1 mL per 100 mg resin, 10 times). The resin was shaken with TFA (1% in DCM, 1 mL per 100 mg resin) for 1 minute (repeat 10 times). The resin was then washed with DCM (1 mL per 100 mg resin, 3 times), DMF (1 mL per 100 mg resin, 3 times), isopropanol (1 mL per 100 mg resin, 3 times), and DCM (1 mL per 100 mg resin, 3 times). The removal of the Mtt group was confirmed by the ninhydrin test. [0082] General Procedure E for the Coupling of Carboxylic Acids to the Rink Amide Resin. Carboxylic acids (5 equiv, 0.5 M in DMF) were first mixed with HBTU (5 equiv, 0.5 M in DMF), HOBt (5 equiv, 0.5 M in DMF), and NMM (15 equiv, 1.5 M inDMF). The mixed solution was then added to the resin and shaken for 2 hours. The resin was then washed with DMF (1 mL per 100 mg resin, 3 times), isopropanol (1 mL per 100 mg resin, 3 times), and DCM (1 mL per 100 mg resin, 3 times). The completion of the coupling reaction was confirmed by the ninhydrin test. [0083] General Procedure F for Peptide Cleavage from the Rink Amide Resin. The resin was washed with DCM (1 mL per 100 mg resin, 5 times) and subsequently shaken with a solution of 95% TFA, 2.5% TIS, and 2.5% H20 (1 mL per 100 mg resin) for 2 hours. The resin was removed by filtration, and the TFA was evaporated under vacuum. The crude peptide was obtained after trituration with diethyl ether (5 mL per 100 mg resin, 2 times). Compound 6a was synthesized using standard Fmoc chemistry on the Rink amide resin in a disposable syringe with a frit (Figure 16). Rink amide resin (200 mg, 0.7 mmol/g loading, 0.14 mmol) was first activated with DCM (2 mL, general procedure A). Fmoc group was removed by piperidine (20% solution in DMF, 2mL, general procedure B). The resin was the coupled with Fmoc-Lys(Mtt)-OH (general procedure E). After the deprotection of Fmoc group (general procedure B), the resin was couple with Fmoc^-Ala-OH (general procedure E). The resin was treated with piperidine (general procedure B) and coupled with Fmoc-Dpr(Boc)-OH (general procedure E). The resin was treated with piperidine (general procedure B) and coupled with Fmoc- Orn(Alloc)-OH (general procedure E). The Fmoc group was removed (general procedure B), and the resin was coupled with Fmoc-F2Pmp-OH (general procedure E). The resin was treated with piperidine (general procedure B) and coupled with BMBA (general procedure E). The Alloc group was removed (general procedure C), and resin was coupled with mlBA (general procedure E). The resin was treated with 1% TFA in DCM for the removal of Mtt group (general procedure D) and coupled with 5-FAM (general procedure E). Compound 6a was cleaved from beads (general procedure F). Crude peptide was purified by HPLC to afford Compound 6a (8.6 mg, 4% yield). MS (ESI): calculated for [M] 1477, found [M+H]+ 1478. Figure 16 depicts the synthesis of Compound 6a: (a) 30% piperidine/DMF; (b) Fmoc-Lys(Mtt)-OH/HBTU/HOBt/NMM; (c) Fmoc-p-Ala- OH/HBTU/HOBt/NMM; (d) Fmoc-Dpr(Boc)-OH/HBTU/HOBt/NMM; (e) Fmoc- Orn(Alloc)-OH/HBTU/HOBt/NMM; (f) Fmoc-F2Pmp-OH/HBTU/HOBt/NMM; (g) 3- bromo-4-methylbenzoic acid/HBTU/HOBt/NMM; (h) Pd(0)/NMM/AcOH; (i) 3- iodobenzoic acid/HBTU/HOBt/NMM; (j)l% TFA/TIS/DCM; (k) 5-Carboxyfluorescein/ HBTU/HOBt/NMM; (1) 95% TFA/H2O/TIS. |
[ 35737-10-1 ]
[ 76608-15-6 ]
[ 160751-44-0 ]

[ 147290-11-7 ]
[ 618-51-9 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 6% | General procedure: .General Procedure A for Rink Amide Resin Activation. Rink amide resin (Advanced ChemTech) was mixed with DCM (1 mL per 100 mg resin) and then shaken for 30 minutes. After activation, resin was washed three times with DMF (1 mL per 100 mg resin). [0079] General Procedure B for the Removal of the Fmoc Group from the Rink Amide Resin. Rink amide resin was mixed with 20% piperidine in DMF (1 mL per 100 mg resin) and shaken for 30 minutes, and then washed with DMF (1 mL per 100 mg resin, 3 times), isopropanol (1 mL per 100 mg resin, 3 times), and DCM (1 mL per 100 mg resin, 3 times) sequentially. The removal of the Fmoc group was confirmed by the ninhydrin test. [0080] General Procedure C for the Removal the Alloc Group from the Rink Amide Resin. The resin (200 mg) was washed with DCM (2 mL, 5 times) and shaken under 2 overnight with a solution of tetrakis(triphenylphosphine)palladium(0) (10 mg), AcOH (0.5 mL), and NMM (0.2 mL) in DCM (10 mL). The resin was then washed with DMF (2 mL, 3 times), isopropanol (2 mL, 3 times), and DCM (2 mL, 3 times). The removal of the Alloc group was confirmed by the ninhydrin test. [0081 ] General Procedure D for the Removal the Mtt Group from the Rink Amide Resin. The resin was washed with DCM (1 mL per 100 mg resin, 10 times). The resin was shaken with TFA (1% in DCM, 1 mL per 100 mg resin) for 1 minute (repeat 10 times). The resin was then washed with DCM (1 mL per 100 mg resin, 3 times), DMF (1 mL per 100 mg resin, 3 times), isopropanol (1 mL per 100 mg resin, 3 times), and DCM (1 mL per 100 mg resin, 3 times). The removal of the Mtt group was confirmed by the ninhydrin test. [0082] General Procedure E for the Coupling of Carboxylic Acids to the Rink Amide Resin. Carboxylic acids (5 equiv, 0.5 M in DMF) were first mixed with HBTU (5 equiv, 0.5 M in DMF), HOBt (5 equiv, 0.5 M in DMF), and NMM (15 equiv, 1.5 M inDMF). The mixed solution was then added to the resin and shaken for 2 hours. The resin was then washed with DMF (1 mL per 100 mg resin, 3 times), isopropanol (1 mL per 100 mg resin, 3 times), and DCM (1 mL per 100 mg resin, 3 times). The completion of the coupling reaction was confirmed by the ninhydrin test. [0083] General Procedure F for Peptide Cleavage from the Rink Amide Resin. The resin was washed with DCM (1 mL per 100 mg resin, 5 times) and subsequently shaken with a solution of 95% TFA, 2.5% TIS, and 2.5% H20 (1 mL per 100 mg resin) for 2 hours. The resin was removed by filtration, and the TFA was evaporated under vacuum. The crude peptide was obtained after trituration with diethyl ether (5 mL per 100 mg resin, 2 times). Compound 4a was synthesized using standard Fmoc chemistry on the Rink amide resin in a disposable syringe with a frit (Figure 14). Rink amide resin (200 mg, 0.7 mmol/g loading, 0.14 mmol) was first activated with DCM (2 mL, general procedure A). Fmoc group was removed by piperidine (20% solution in DMF, 2mL, general procedure B). The resin was the coupled with Fmoc-Lys(Mtt)-OH (general procedure E). After the deprotection of Fmoc group (general procedure B), the resin was couple with Fmoc^-Ala-OH (general procedure E). The resin was treated with piperidine (general procedure B) and coupled with <strong>[147290-11-7]<strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>-OH</strong> (general procedure E). The Fmoc group was removed (general procedure B), and the resin was coupled with Fmoc- F2Pmp-OH (general procedure E). The Alloc group was removed (general procedure C), and resin was coupled with mlBA (general procedure E). The resin was treated with 1% TFA in DCM for the removal of Mtt group (general procedure D) and coupled with 5-FAM (general procedure E). The resin was treated with piperidine to remove Fmoc group. Compound 4a was cleaved from beads (general procedure F). Crude peptide was purified by HPLC to afford 4a (10.4 mg, 6%> yield). MS (ESI): calculated for [M] 1195, found [M+H]+ 1196 Figure 14 depicts the synthesis of Compound 4a: (a) 30% piperidine/DMF; (b) Fmoc-Lys(Mtt)-OH/HBTU/HOBt/NMM; (c) Fmoc-p-Ala-OH/HBTU/HOBt/NMM; (d) <strong>[147290-11-7]<strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>-OH</strong>/HBTU/HOBt/NMM; (e) Fmoc-F2Pmp-OH/HBTU/HOBt/NMM; (f) Pd(0)/NMM/AcOH; (g) 3-iodobenzoic acid/HBTU/HOBt/NMM; (h) 1% TFA/TIS/DCM; (i) 5-Carboxyfluorescein/HBTU/HOBt/NMM; (j) 95% TFA/H20/TIS. |
[ 7697-26-9 ]
[ 306-08-1 ]
[ 35661-40-6 ]
[ 198544-42-2 ]
[ 147290-11-7 ]
[ 618-51-9 ]
[ 1403229-66-2 ]| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 12% | General procedure: General Procedure A for Rink Amide Resin Activation. Rink amide resin (Advanced ChemTech) was mixed with DCM (1 mL per 100 mg resin) and then shaken for 30 minutes. After activation, resin was washed three times with DMF (1 mL per 100 mg resin). [0079] General Procedure B for the Removal of the Fmoc Group from the Rink Amide Resin. Rink amide resin was mixed with 20% piperidine in DMF (1 mL per 100 mg resin) and shaken for 30 minutes, and then washed with DMF (1 mL per 100 mg resin, 3 times), isopropanol (1 mL per 100 mg resin, 3 times), and DCM (1 mL per 100 mg resin, 3 times) sequentially. The removal of the Fmoc group was confirmed by the ninhydrin test.General Procedure C for the Removal the Alloc Group from the Rink Amide Resin. The resin (200 mg) was washed with DCM (2 mL, 5 times) and shaken under 2 overnight with a solution of tetrakis(triphenylphosphine)palladium(0) (10 mg), AcOH (0.5 mL), and NMM (0.2 mL) in DCM (10 mL). The resin was then washed with DMF (2 mL, 3 times), isopropanol (2 mL, 3 times), and DCM (2 mL, 3 times). The removal of the Alloc group was confirmed by the ninhydrin test.General Procedure E for the Coupling of Carboxylic Acids to the Rink Amide Resin. Carboxylic acids (5 equiv, 0.5 M in DMF) were first mixed with HBTU (5 equiv, 0.5 M in DMF), HOBt (5 equiv, 0.5 M in DMF), and NMM (15 equiv, 1.5 M inDMF). The mixed solution was then added to the resin and shaken for 2 hours. The resin was then washed with DMF (1 mL per 100 mg resin, 3 times), isopropanol (1 mL per 100 mg resin, 3 times), and DCM (1 mL per 100 mg resin, 3 times). The completion of the coupling reaction was confirmed by the ninhydrin test. [0083] General Procedure F for Peptide Cleavage from the Rink Amide Resin. The resin was washed with DCM (1 mL per 100 mg resin, 5 times) and subsequently shaken with a solution of 95% TFA, 2.5% TIS, and 2.5% H20 (1 mL per 100 mg resin) for 2 hours. The resin was removed by filtration, and the TFA was evaporated under vacuum. The crude peptide was obtained after trituration with diethyl ether (5 mL per 100 mg resin, 2 times) Compound 8 was synthesized using standard Fmoc chemistry on the Rink amide resin (Figure 18). The resin (200 mg, 0.7 mmol/g loading) was first activated by DCM (General procedure A). The Fmoc group on the resin was removed by piperidine in DMF (General procedure B). The resin was then coupled with Fmoc-Dpr(Boc)-OH. The Fmoc group on the resin was removed by piperidine in DMF (General procedure B). The resin was then coupled with <strong>[147290-11-7]<strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>-OH</strong>. The Fmoc group was removed (General procedure B) and Fmoc-Phe-OH was attached to resin (General procedure E). The Fmoc group was again removed (general procedure B) and the amine group on the F2Pmp residue was coupled with BMBA (general procedure E). The resin was treated with Pd(0) for the deprotection of Alloc group (general procedure C). 3- Iodobenzoic acid (mlBA) was attached to resin (general procedure E). The resin was treated with TFA (general procedure F) to give the crude peptide intermediate, which was treated with a mixture of HVA (0.5 M in DMF, 100 muGamma), HBTU (0.5 M in DMF, 100 muGamma), HOBt (0.5 M in DMF, 100 muGamma) and NMM (1.5 M in DMF, 100 muGamma) to give the crude product 8. The crude product was purified by HPLC to afford 8 (15.8 mg, 12% yield). The assignment of proton NMR utilized additional information from COSY. 1H NMR (500 MHz, DMSO-d6): S= 8.70 (d, J= 8.1 Hz, 1 H, BMBA-NH), 8.60-8.55 (m, 1 H, mlBA- NH), 8.35 (d, J= 6.9 Hz, 1 H, Phe-NH), 8.19 (s, 1 H, mlBA-ArH), 8.04-7.95 (m, 2 H, Orn-NH, BMBA-ArH), 7.91-7.83 (m, 3 H, mlBA-ArH, HVA-NH), 7.67 (d, J= 7.5 Hz, 1 H, BMBA-ArH), 7.40-7.15 (m, 9 H, BMBA-ArH, Phe-ArH, -CONH2 , mlBA-ArH), 6.77 (s, 1 H, HVA-ArH), 6.63 (d, J= 7.6 Hz, 1 H, HVA-ArH), 6.58 (d, J= 7.6 Hz, 1 H, HVA- ArH), 4.78-4.72 (m, 1 H, Phe-CaH), 4.30-4.22 (m, 2 H, Dpr-CaH, Orn-CaH), 3.70 (s, 3 H, HVA-OCH3), 3.40-3.35 (m, 1 H, Dpr-CpHH'), 3.35-3.18 (m, HVA-CH2-CO, Dpr-CpHH', Omicronpiiota-OmicrondeltaEta2, Phe-CpHH'), 3.04-2.96 (m, 1 H, Phe-CpHH'), 2.35 (s, 3 H, BMBA-Ar-CH3), I.81-1.74 (m, 1 H, Orn-CpHH'), 1.68-1.52 (m, 3 H, Orn-CpHH', Orn-CYH2). 13C MR (125 MHz, DMSO-d6 ): S= 171.79, 171.39, 171.25, 171.17, 164.70, 164.52, 147.13, 144.94, 140.65, 139.46, 138.30, 136.49, 135.51, 133.34, 130.75, 130.32, 129.00, 127.92, 126.62, 126.54, 126.10, 123.78, 121.26, 1 15.05, 1 13.13, 94.53, 55.37, 54.77, 53.01, 52.80, 41.74, 40.57, 36.68, 28.99, 25.46, 22.26. MS (ESI): calculated for [M], 954, found [M+H]+ 955. HPLC purity analysis: > 95% (UV, lambda = 254 nm). Figure 18 depicts the synthesis of Compound 8: (a) 30% piperidine/DMF; (b) Fmoc-Dpr(Boc)-OH/HBTU/HOBt/NMM; (c) <strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>- OH/HBTU/HOBt/NMM; (d) Fmoc-Phe-OH/HBTU/HOBt/NMM; (e) 3-bromo-4- methylbenzoic acid/HBTU/HOBt/NMM; (f) Pd(0)/NMM/AcOH; (g) 3 -iodobenzoic acid/HBTU/HOBt/NMM; (h) 95% TFA/H2O/TIS; (i) homovanillic acid/HBTU/HOBt/NMM. |
[ 7697-26-9 ]
[ 306-08-1 ]
[ 160751-44-0 ]
[ 198544-42-2 ]
[ 147290-11-7 ]
[ 618-51-9 ]
[ 1403229-65-1 ]| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 14% | General procedure: General Procedure A for Rink Amide Resin Activation. Rink amide resin (Advanced ChemTech) was mixed with DCM (1 mL per 100 mg resin) and then shaken for 30 minutes. After activation, resin was washed three times with DMF (1 mL per 100 mg resin). [0079] General Procedure B for the Removal of the Fmoc Group from the Rink Amide Resin. Rink amide resin was mixed with 20% piperidine in DMF (1 mL per 100 mg resin) and shaken for 30 minutes, and then washed with DMF (1 mL per 100 mg resin, 3 times), isopropanol (1 mL per 100 mg resin, 3 times), and DCM (1 mL per 100 mg resin, 3 times) sequentially. The removal of the Fmoc group was confirmed by the ninhydrin test.General Procedure C for the Removal the Alloc Group from the Rink Amide Resin. The resin (200 mg) was washed with DCM (2 mL, 5 times) and shaken under 2 overnight with a solution of tetrakis(triphenylphosphine)palladium(0) (10 mg), AcOH (0.5 mL), and NMM (0.2 mL) in DCM (10 mL). The resin was then washed with DMF (2 mL, 3 times), isopropanol (2 mL, 3 times), and DCM (2 mL, 3 times). The removal of the Alloc group was confirmed by the ninhydrin test.General Procedure E for the Coupling of Carboxylic Acids to the Rink Amide Resin. Carboxylic acids (5 equiv, 0.5 M in DMF) were first mixed with HBTU (5 equiv, 0.5 M in DMF), HOBt (5 equiv, 0.5 M in DMF), and NMM (15 equiv, 1.5 M inDMF). The mixed solution was then added to the resin and shaken for 2 hours. The resin was then washed with DMF (1 mL per 100 mg resin, 3 times), isopropanol (1 mL per 100 mg resin, 3 times), and DCM (1 mL per 100 mg resin, 3 times). The completion of the coupling reaction was confirmed by the ninhydrin test. [0083] General Procedure F for Peptide Cleavage from the Rink Amide Resin. The resin was washed with DCM (1 mL per 100 mg resin, 5 times) and subsequently shaken with a solution of 95% TFA, 2.5% TIS, and 2.5% H20 (1 mL per 100 mg resin) for 2 hours. The resin was removed by filtration, and the TFA was evaporated under vacuum. The crude peptide was obtained after trituration with diethyl ether (5 mL per 100 mg resin, 2 times). Compound 7 was synthesized using standard Fmoc chemistry on the Rink amide resin (Figure 17). The resin (200 mg, 0.7 mmol/g loading) was first activated by DCM (General procedure A). The Fmoc group on the resin was removed by piperidine in DMF (General procedure B). The resin was then coupled with Fmoc-Dpr(Boc)-OH. The Fmoc group on the resin was removed by piperidine in DMF (General procedure B). The resin was then coupled with <strong>[147290-11-7]<strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>-OH</strong>. The Fmoc group was removed (General procedure B) and Fmoc-F2Pmp-OH was attached to resin (General procedure E). The Fmoc group was again removed (general procedure B) and the amine group on the F2Pmp residue was coupled with BMBA (general procedure E). The resin was treated with Pd(0) for the deprotection of Alloc group (general procedure C). 3-Iodobenzoic acid (mlBA) was attached to resin (general procedure E). The resin was treated with TFA (general procedure F) to give the crude peptide intermediate, which was treated with a mixture of HVA (0.5 M in DMF, 100 LL), HBTU (0.5 M in DMF, 100 LL), HOBt (0.5 M in DMF, 100 LL) and NMM (1.5 M in DMF, 100 mu,) to give the crude product 7. The crude product was purified by HPLC to afford compound 7 (21.5 mg, 14% yield). The assignment of proton NMR utilized additional information from COSY. 1H NMR (500 MHz, CD3OD): delta= 8.16 (s, 1 H, mlBA-ArH), 7.92 (s, 1 H, BMBA-ArH), 7.86 (d, J= 7.9 Hz, 1 H, mlBA-ArH), 7.78 (d, J= 7.9 Hz, 1 H, mlBA-ArH) 7.64 (d, J= 8.2 Hz, 1 H, BMBA-ArH), 7.58-7.52 (m, 3 H, BMBA-ArH, F2Pmp-ArH), 7.39 (d, J= 7.9 Hz, 2 H, F2Pmp-ArH) 7.27 (d, J= 8.2 Hz, 1 H, BMBA-ArH), 7.21-7.16 (m, 1 H, mlBA-ArH), 6.81- 6.78 (m, 1 H, HVA-ArH), 6.71-6.63 (m, 2 H, HVA-ArH), 4.83-4.80 (m, 1 H, F2Pmp- CH), 4.48-4.42 (m, 1 H, Dpr- CH), 4.30-4.24 (m, 1 H, Orn- CH), 3.77 (s, 3 H, HVA- OCH3), 3.63-3.58 (m, 1 H, Dpr- CpHH'), 3.51-3.45 (m, 1 H, Dpr- CpHH'), 3.41 - 3.33 (m, 5 H, Orn-C5H2, F2Pmp-CpHH', HVA-CH2-CO-), 3.16-3.09 (m, 1 H, F2Pmp-CpHH'), 2.39 (s, 3 H, BMBA-Ar-CH3). 1.92-1.85 (m, 1 H, Orn-CpHH'), 1.75-1.62 (m, 3 H, Orn-CpHH', Orn-CYH2). 13C MR (125 MHz, CD30D): delta= 175.72, 174.20, 174.15, 168.85, 168.48, 148.97, 146.60, 143.20, 141.53, 141.41, 137.67, 137.41, 134.42, 132.45, 131.95, 131.35, 130.25, 127.83, 127.63, 127.60 127.53, 125.65, 122.83, 1 16.30, 1 13.84, 101.39, 94.73, 56.73, 56.43, 55.33, 43.37, 42.17, 4Figure 17 depicts the synthesis of Compound 7: (a) 30% piperidine/DMF; (b) Fmoc-Dpr(Boc)-OH/HBTU/HOBt/NMM; (c) <strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>- OH/HBTU/HOBt/NMM; (d) Fmoc-F2Pmp-OH/HBTU/HOBt/NMM; (e) 3-bromo-4- methylbenzoic acid/HBTU/HOBt/NMM; (f) Pd(0)/NMM/AcOH; (g) 3 -iodobenzoic acid/HBTU/HOBt/NMM; (h) 95% TFA/H2O/TIS; (i) homovanillic acid/HBTU/HOBt/NMM.0.39, 37.76, 29.54, 26.96, 23.03. MS (ESI): calculated for [M], 1084, found [M+H]+ 1085. HPLC purity analysis: > 95% (UV, lambda = 254 nm). |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 12% | General procedure: General Procedure A for Rink Amide Resin Activation. Rink amide resin (Advanced ChemTech) was mixed with DCM (1 mL per 100 mg resin) and then shaken for 30 minutes. After activation, resin was washed three times with DMF (1 mL per 100 mg resin). [0079] General Procedure B for the Removal of the Fmoc Group from the Rink Amide Resin. Rink amide resin was mixed with 20% piperidine in DMF (1 mL per 100 mg resin) and shaken for 30 minutes, and then washed with DMF (1 mL per 100 mg resin, 3 times), isopropanol (1 mL per 100 mg resin, 3 times), and DCM (1 mL per 100 mg resin, 3 times) sequentially. The removal of the Fmoc group was confirmed by the ninhydrin test.General Procedure C for the Removal the Alloc Group from the Rink Amide Resin. The resin (200 mg) was washed with DCM (2 mL, 5 times) and shaken under 2 overnight with a solution of tetrakis(triphenylphosphine)palladium(0) (10 mg), AcOH (0.5 mL), and NMM (0.2 mL) in DCM (10 mL). The resin was then washed with DMF (2 mL, 3 times), isopropanol (2 mL, 3 times), and DCM (2 mL, 3 times). The removal of the Alloc group was confirmed by the ninhydrin test.General Procedure E for the Coupling of Carboxylic Acids to the Rink Amide Resin. Carboxylic acids (5 equiv, 0.5 M in DMF) were first mixed with HBTU (5 equiv, 0.5 M in DMF), HOBt (5 equiv, 0.5 M in DMF), and NMM (15 equiv, 1.5 M inDMF). The mixed solution was then added to the resin and shaken for 2 hours. The resin was then washed with DMF (1 mL per 100 mg resin, 3 times), isopropanol (1 mL per 100 mg resin, 3 times), and DCM (1 mL per 100 mg resin, 3 times). The completion of the coupling reaction was confirmed by the ninhydrin test. [0083] General Procedure F for Peptide Cleavage from the Rink Amide Resin. The resin was washed with DCM (1 mL per 100 mg resin, 5 times) and subsequently shaken with a solution of 95% TFA, 2.5% TIS, and 2.5% H20 (1 mL per 100 mg resin) for 2 hours. The resin was removed by filtration, and the TFA was evaporated under vacuum. The crude peptide was obtained after trituration with diethyl ether (5 mL per 100 mg resin, 2 times). Compound 5 was synthesized using standard Fmoc chemistry on the Rink amide resin (Figure 15). The resin (200 mg, 0.7 mmol/g loading, 0.14 mmole) was first activated by DCM (General procedure A). The Fmoc group on the resin was removed by piperidine in DMF (General procedure B). The resin was then coupled with <strong>[147290-11-7]<strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>-OH</strong> (general procedure E). The Fmoc group was removed (General procedure B) and Fmoc-F2Pmp-OH was attached to resin (General procedure E). The Fmoc group was again removed (general procedure B) and the resin was couple with BMBA (general procedure E). The resin was treated with Pd(0) for the deprotection of Alloc group (general procedure C). 3-Iodobenzoic acid (mlBA) was attached to resin (general procedure E). Compound 5 was cleaved from beads (General procedure F). Crude peptide was purified by HPLC to afford 5 (13.6 mg, 12% yield). The assignment of proton NMR utilized additional information from COSY. 1H NMR (500 MHz, CD3OD): delta= 8.14 (s, 1 H, mlBA-ArH), 7.98 (s, 1 H, BMBA-ArH), 7.84 (d, J= 7.9 Hz, 1 H, mlBA-ArH), 7.76 (d, J= 7.9 Hz, 1 H, mlBA-ArH) 7.64 (d, J= 8.2 Hz, 1 H, BMBA-ArH), 7.51 (d, J= 7.9 Hz, 2 H, F2Pmp- ArH), 7.38 (d, J= 7.9 Hz, 2 H, F2 Pmp- ArH) 7.31 (d, J= 8.2 Hz, 1 H, BMBA-ArH), 7.21-7.17 (m, 1 H, mlBA-ArH), 4.79-4.73 (m, 1 H, F2Pmp-CaH), 4.41-4.34 (m, 1 H, Orn-CaH), 3.40-3.32 (m, 2 H, Orn-C5H2 ), 3.20- 3.15 (m, 2 H, F2Pmp-CpH2), 2.41 (s, 3 H, BMBA-Ar-CH3). 1.82-1.75 (m, 1 H, Orn- CpHH'), 1.75-1.61 (m, 3 H, Orn-CpHH', Orn-CYH2). 13C NMR (125 MHz, CD3OD): delta= 173.28, 168.65, 143.18, 141.53, 137.75, 137.39, 134.53, 132.51, 131.98, 131.36, 130.35, 127.64, 127.59, 125.70, 94.75, 57.05, 40.40, 38.44, 30.44, 26.76, 23.07. MS (ESI):calculated for [M], 834, found [M+H]+ 835. HPLC purity analysis: > 95% (UV, lambda = 254 nm).Figure 15 depicts the synthesis of Compound 5: (a) 30% piperidine/DMF; (b) <strong>[147290-11-7]<strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>-OH</strong>/HBTU/HOBt/NMM; (c) Fmoc-F2Pmp-OH/HBTU/HOBt/NMM; (d) 3-bromo-4-methylbenzoic acid/HBTU/HOBt/NMM; (e) Pd(0)/NMM/AcOH; (f) 3- iodobenzoic acid /HBTU/HOBt/NMM; (g) 95% TFA/H2O/TIS. |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 16% | General procedure: Compound 3 was synthesized using standard Fmoc chemistry on the Rink amide resin (Figure 13). The resin (200 mg, 0.7 mmol/g loading, 0.14 mmol) was first activated by DCM (General procedure A). The Fmoc group on the resin was removed by piperidine in DMF (General procedure B). The resin was then coupled with <strong>[147290-11-7]<strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>-OH</strong> (general procedure E). The Fmoc group was removed (General procedure B) and Fmoc-F2Pmp-OH was attached to resin (General procedure E). The Fmoc group was again removed (general procedure B) and the amine group on the F2Pmp residue was capped by AcOH (general procedure E). The resin was treated with Pd(0) for the deprotection of Alloc group (general procedure C). 3- Iodobenzoic acid (mlBA) was attached to resin (general procedure E). Compound 3 was cleaved from beads (General procedure F). Crude peptide was purified by HPLC to afford 3 (15.1 mg, 16% yield). The assignment of proton NMR utilized additional information from COSY. NMR (500 MHz, CD3 OD): delta= 8.17 (s, 1 H, mlBA-ArH), 7.87 (d, J= 7.9 Hz, 1 H, mlBA-ArH) 7.79 (d, J= 7.9 Hz, 1 H, mlBA-ArH) 7.50 (d, J= 7.9 Hz, 2 H, F2Pmp-ArH), 7.33 (d, J= 7.9 Hz, 2 H, F2Pmp-ArH), 7.24-7.20 (m, 1 H, mlBA-ArH), 4.59- 4.53 (m, 1 H, F2Pmp-CaH), 4.37-4.32 (m, 1 H, Orn-CaH), 3.40-3.32 (m, 2 H, Orn-C6H2 ), 3.07-3.02 (m, 2 H, F2Pmp-CpH2 ), 1.94 (s, 3 H, - COCH3). 1.80-1.71 (m, 1 H, Orn- CpHH'), 1.68-1.54 (m, 3 H, Orn-CpHH', Orn-CYH2). 13C NMR (125 MHz, CD30D): delta= 173.32, 173.16, 141.53, 140.72, 137.78, 137.35, 131.36, 130.32, 127.59, 94.68, 56.43, 40.36, 38.63, 30.40, 26.72, 22.37. MS (ESI): calculated for [M], 680, found [M+H]+ 681. HPLC purity analysis: > 95% (UV, lambda = 254 nm).Figure 13 depicts the synthesis of Compound 3: (a) 30% piperidine/DMF; (b) <strong>[147290-11-7]<strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>-OH</strong>/HBTU/HOBt/NMM; (c) Fmoc-F2Pmp-OH/HBTU/HOBt/NMM; (d) AcOH/HBTU/HOBt/NMM; (e) Pd(0)/NMM/AcOH; (f) 3-iodobenzoic acid /HBTU/HOBt/NMM; (g) 95% TFA/H2O/TIS. |
[ 205526-34-7 ]

[ 35737-15-6 ]
[ 64-19-7 ]
[ 133464-46-7 ]

[ 147290-11-7 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 10% | 6.1 Specific Peptides. (0263) Peptides of the following structures were synthesized by the general methods described above, and except where indicated MC1-R Ki and MC4-R Ki values for each peptide were determined in competitive binding assays using [I125]-NDP-alpha-MSH as described in 7.1 below. All peptides were prepared in the TFA acid salt form, except for the peptides of Examples 43, 46 and 67, which were prepared in the acetate salt form. (0264) The syntheses of some specific peptides of the invention are illustrated below. These peptides were prepared using solid phase peptide synthesis by means of a Symphony Multiplex Peptide Synthesizer (Rainin Instrument Company/Protein Technologies Inc) automated peptide synthesizer. Step 1: Coupling of Orn (0265) The Sierber resin 9-Fmoc-Aminoxanthen-3-yloxy-polystyrene resin (0.39 mol/g, ChemPep Inc., 151902) was swelled in 3×5 mL of DMF for 10 min. Thereafter, Fmoc was deprotected using 2×5 mL of 20% piperidine in DMF for 10 min. The resin was then washed in 6×5 mL DMF for 30 sec. 5 mL of 200 mM <strong>[147290-11-7]<strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>-OH</strong> in DMF and 5 mL 200 mM HBTU containing 400 mM NMM in DMF was added and after 30 min the resin was washed with 3×5 mL DMF for 30 sec. Step 2: Coupling of Next 6 Amino Acids (AA) (0266) The resin from step 1 was first swelled in 3×5 mL of DMF for 30 sec, Fmoc was deprotected using 2×5 mL of 20% piperidine in DMF for 10 min and then washed with 6×5 mL DMF for 30 sec. 5 mL of 200 mM Fmoc-AA-OH solution and 5 mL 200 mM HBTU containing 400 mM NMM in DMF was added and after 30 min the resin was washed with 3×5 mL DMF for 30 sec. (0267) This step was repeated for each amino acid (AA). Step 3: Acetylation (0268) Fmoc was deprotected using 2×5 mL of 20% piperidine in DMF for 10 min and the resin was then washed with 3×5 mL DMF for 30 sec. Thereafter, 5 mL of 50% Ac2O/DMF solution was added and after 30 min the peptide resin was washed with 3×5 mL DMF for 30 sec and 6×5 mL DCM for 30 sec. Step 4: Allyl/Alloc Deprotection (0269) The peptide resin (0.6 mmol) was mixed with phenylsilane (Oakwood Chemical, S13600) (20 eq.) in 20 mL of DCM and bubbled with nitrogen for 5 min. (0270) Tetrakis(triphenylphosphine)-palladium(0) (Strem Chemicals, Inc., 46-2150) (0.2 eq.) was added and the mixture was agitated with nitrogen for 1 hour. The procedure was repeated one time for 1 hour and an additional time for 30 min with fresh reagents. The treated peptide resin was then washed with DCM x 3 and DMF x 3. Step 5: Lactam Formation (0271) The lactam ring was formed on the peptide resin using TBTU (2 eq.) and ethyldiisopropylamine (DIEA) (4 eq.) in 20 mL DMF for 1 hour. A second coupling may be needed if a positive Kaiser Ninhydrin test is observed. Step 6: Peptide Cleavage (0272) The peptide resin (0.6 mmol) was mixed with 20 mL of 5% sodium diethyldithio-carbamate trihydrate (NaCS2NEt2, Aldrich, 228680) in DMF for 20 min and then washed with DMF×3, DCM×3 and diethyl ether×2. (0273) The resin (0.6 mmol) was then stirred in a 25 mL of TFA/TIS/H2O (90:5.0:5.0 v/v/v) for 2.5 hours. The resin was filtered. The filtrate was concentrated to about 10 mL in volume and about 140 mL of cold diethyl ether (pre-cooled to about 0 C.) was added. (0274) The mixture was vortexed, and then placed in the refrigerator (about -4 C.) for 1 h, centrifuged for 5 min at 2800 rpm, and the ether layer was decanted. (0275) The peptide was washed with 90 mL of cold diethyl ether (pre-cooled to about 0 C.), vortexed, centrifuged for 5 min at 2800 rpm, and ether layer decanted. (0276) The resulting solid was dissolved in 50% AcOH/H2O and stored at room temperature overnight. (0277) The crude peptide solution was concentrated to afford solid crude peptide for HPLC purification. (0278) After HPLC purification, the peptide TFA salt was converted to peptide acetate salt using ion exchange (×100 eq.). The anion exchange resin used was Dowex SBR LC NG, OH-form (Supelco, Cat14036-U). Example 46 (0279) [table-us-00008-en] (SEQIDNO:51) Ac-Arg-cyclo(Glu-Gln-D-Phe(4-CN)-Arg-Trp-Orn)-NH2 (0280) The procedure described above was followed in the preparation of the title peptide. (0281) The amino acids added in step 2 were, in the order of being coupled, Fmoc-Trp(Boc)-OH, Fmoc-Arg(Pbf)-OH, Fmoc-D-Phe(4-CN)-OH, Fmoc-Gln(Trt)-OH, Fmoc-Glu(OAll)-OH, and Fmoc-Arg(Pbf)-OH. (0282) The resulting peptide was purified by HPLC (column: Atlantis dC18 OBD 19×100 mm (5mu., Waters part 186001367) using 10% MeOH/H2O containing 0.1% TFA (solvent A) and 90% MeOH/H2O containing 0.1% TFA (solvent B). A gradient of 0%-5% of solvent B for 5 min and 5%-35% of solvent B for 30 min was used. (0283) The peptide yield was 10%. |
[ 177966-64-2 ]
[ 71989-31-6 ]
[ 35737-15-6 ]
[ 64-19-7 ]
[ 133464-46-7 ]

[ 147290-11-7 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 16% | 6.1 Specific Peptides. (0263) Peptides of the following structures were synthesized by the general methods described above, and except where indicated MC1-R Ki and MC4-R Ki values for each peptide were determined in competitive binding assays using [I125]-NDP-alpha-MSH as described in 7.1 below. All peptides were prepared in the TFA acid salt form, except for the peptides of Examples 43, 46 and 67, which were prepared in the acetate salt form. (0264) The syntheses of some specific peptides of the invention are illustrated below. These peptides were prepared using solid phase peptide synthesis by means of a Symphony Multiplex Peptide Synthesizer (Rainin Instrument Company/Protein Technologies Inc) automated peptide synthesizer. Step 1: Coupling of Orn (0265) The Sierber resin 9-Fmoc-Aminoxanthen-3-yloxy-polystyrene resin (0.39 mol/g, ChemPep Inc., 151902) was swelled in 3×5 mL of DMF for 10 min. Thereafter, Fmoc was deprotected using 2×5 mL of 20% piperidine in DMF for 10 min. The resin was then washed in 6×5 mL DMF for 30 sec. 5 mL of 200 mM <strong>[147290-11-7]<strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>-OH</strong> in DMF and 5 mL 200 mM HBTU containing 400 mM NMM in DMF was added and after 30 min the resin was washed with 3×5 mL DMF for 30 sec. Step 2: Coupling of Next 6 Amino Acids (AA) (0266) The resin from step 1 was first swelled in 3×5 mL of DMF for 30 sec, Fmoc was deprotected using 2×5 mL of 20% piperidine in DMF for 10 min and then washed with 6×5 mL DMF for 30 sec. 5 mL of 200 mM Fmoc-AA-OH solution and 5 mL 200 mM HBTU containing 400 mM NMM in DMF was added and after 30 min the resin was washed with 3×5 mL DMF for 30 sec. (0267) This step was repeated for each amino acid (AA). Step 3: Acetylation (0268) Fmoc was deprotected using 2×5 mL of 20% piperidine in DMF for 10 min and the resin was then washed with 3×5 mL DMF for 30 sec. Thereafter, 5 mL of 50% Ac2O/DMF solution was added and after 30 min the peptide resin was washed with 3×5 mL DMF for 30 sec and 6×5 mL DCM for 30 sec. Step 4: Allyl/Alloc Deprotection (0269) The peptide resin (0.6 mmol) was mixed with phenylsilane (Oakwood Chemical, S13600) (20 eq.) in 20 mL of DCM and bubbled with nitrogen for 5 min. (0270) Tetrakis(triphenylphosphine)-palladium(0) (Strem Chemicals, Inc., 46-2150) (0.2 eq.) was added and the mixture was agitated with nitrogen for 1 hour. The procedure was repeated one time for 1 hour and an additional time for 30 min with fresh reagents. The treated peptide resin was then washed with DCM x 3 and DMF x 3. Step 5: Lactam Formation (0271) The lactam ring was formed on the peptide resin using TBTU (2 eq.) and ethyldiisopropylamine (DIEA) (4 eq.) in 20 mL DMF for 1 hour. A second coupling may be needed if a positive Kaiser Ninhydrin test is observed. Step 6: Peptide Cleavage (0272) The peptide resin (0.6 mmol) was mixed with 20 mL of 5% sodium diethyldithio-carbamate trihydrate (NaCS2NEt2, Aldrich, 228680) in DMF for 20 min and then washed with DMF×3, DCM×3 and diethyl ether×2. (0273) The resin (0.6 mmol) was then stirred in a 25 mL of TFA/TIS/H2O (90:5.0:5.0 v/v/v) for 2.5 hours. The resin was filtered. The filtrate was concentrated to about 10 mL in volume and about 140 mL of cold diethyl ether (pre-cooled to about 0 C.) was added. (0274) The mixture was vortexed, and then placed in the refrigerator (about -4 C.) for 1 h, centrifuged for 5 min at 2800 rpm, and the ether layer was decanted. (0275) The peptide was washed with 90 mL of cold diethyl ether (pre-cooled to about 0 C.), vortexed, centrifuged for 5 min at 2800 rpm, and ether layer decanted. (0276) The resulting solid was dissolved in 50% AcOH/H2O and stored at room temperature overnight. (0277) The crude peptide solution was concentrated to afford solid crude peptide for HPLC purification. (0278) After HPLC purification, the peptide TFA salt was converted to peptide acetate salt using ion exchange (×100 eq.). The anion exchange resin used was Dowex SBR LC NG, OH-form (Supelco, Cat14036-U). Example 67 (0284) [table-us-00009-en] (SEQIDNO:72) Ac-Arg-cyclo(Glu-Pro-D-Phe(4-F)-Arg-Trp-Orn)-NH2 (0285) The procedure described above was followed in the preparation of the title peptide except for that 15 mL of 5% sodium diethyldithio-carbamate trihydrate in DMF, 16 mL of TFA/TIS/H2O and 90 mL+60 mL of diethyl ether were used in step 6. Moreover, the filtrate was concentrated to 5 mL. (0286) The amino acids added in step 2 were, in the order of being coupled, Fmoc-Trp(Boc)-OH, Fmoc-Arg(Pbf)-OH, Fmoc-D-Phe(4-F)-OH, Fmoc-Pro-OH, Fmoc-Glu(OAll)-OH, and Fmoc-Arg(Pbf)-OH. (0287) The resulting peptide was purified by HPLC (column: Atlantis dC18 OBD 19×100 mm (5mu., Waters part 186001367) using 10% MeOH/H2O containing 0.1% TFA (solvent A) and 90% MeOH/H2O containing 0.1% TFA (solvent B). A gradient of 5%-10% of solvent B for 5 min and 10%-40% of solvent B for 30 min was used. (0288) The peptide yield was 16%. |
[ 205526-22-3 ]
[ 35737-15-6 ]
[ 133464-46-7 ]
[ 76-05-1 ]

[ 147290-11-7 ]

| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 6.1 Specific Peptides. (0263) Peptides of the following structures were synthesized by the general methods described above, and except where indicated MC1-R Ki and MC4-R Ki values for each peptide were determined in competitive binding assays using [I125]-NDP-alpha-MSH as described in 7.1 below. All peptides were prepared in the TFA acid salt form, except for the peptides of Examples 43, 46 and 67, which were prepared in the acetate salt form. (0264) The syntheses of some specific peptides of the invention are illustrated below. These peptides were prepared using solid phase peptide synthesis by means of a Symphony Multiplex Peptide Synthesizer (Rainin Instrument Company/Protein Technologies Inc) automated peptide synthesizer. Step 1: Coupling of Orn (0265) The Sierber resin 9-Fmoc-Aminoxanthen-3-yloxy-polystyrene resin (0.39 mol/g, ChemPep Inc., 151902) was swelled in 3×5 mL of DMF for 10 min. Thereafter, Fmoc was deprotected using 2×5 mL of 20% piperidine in DMF for 10 min. The resin was then washed in 6×5 mL DMF for 30 sec. 5 mL of 200 mM <strong>[147290-11-7]<strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>-OH</strong> in DMF and 5 mL 200 mM HBTU containing 400 mM NMM in DMF was added and after 30 min the resin was washed with 3×5 mL DMF for 30 sec. Step 2: Coupling of Next 6 Amino Acids (AA) (0266) The resin from step 1 was first swelled in 3×5 mL of DMF for 30 sec, Fmoc was deprotected using 2×5 mL of 20% piperidine in DMF for 10 min and then washed with 6×5 mL DMF for 30 sec. 5 mL of 200 mM Fmoc-AA-OH solution and 5 mL 200 mM HBTU containing 400 mM NMM in DMF was added and after 30 min the resin was washed with 3×5 mL DMF for 30 sec. (0267) This step was repeated for each amino acid (AA). Step 3: Acetylation (0268) Fmoc was deprotected using 2×5 mL of 20% piperidine in DMF for 10 min and the resin was then washed with 3×5 mL DMF for 30 sec. Thereafter, 5 mL of 50% Ac2O/DMF solution was added and after 30 min the peptide resin was washed with 3×5 mL DMF for 30 sec and 6×5 mL DCM for 30 sec. Step 4: Allyl/Alloc Deprotection (0269) The peptide resin (0.6 mmol) was mixed with phenylsilane (Oakwood Chemical, S13600) (20 eq.) in 20 mL of DCM and bubbled with nitrogen for 5 min. (0270) Tetrakis(triphenylphosphine)-palladium(0) (Strem Chemicals, Inc., 46-2150) (0.2 eq.) was added and the mixture was agitated with nitrogen for 1 hour. The procedure was repeated one time for 1 hour and an additional time for 30 min with fresh reagents. The treated peptide resin was then washed with DCM x 3 and DMF x 3. Step 5: Lactam Formation (0271) The lactam ring was formed on the peptide resin using TBTU (2 eq.) and ethyldiisopropylamine (DIEA) (4 eq.) in 20 mL DMF for 1 hour. A second coupling may be needed if a positive Kaiser Ninhydrin test is observed. Step 6: Peptide Cleavage (0272) The peptide resin (0.6 mmol) was mixed with 20 mL of 5% sodium diethyldithio-carbamate trihydrate (NaCS2NEt2, Aldrich, 228680) in DMF for 20 min and then washed with DMF×3, DCM×3 and diethyl ether×2. (0273) The resin (0.6 mmol) was then stirred in a 25 mL of TFA/TIS/H2O (90:5.0:5.0 v/v/v) for 2.5 hours. The resin was filtered. The filtrate was concentrated to about 10 mL in volume and about 140 mL of cold diethyl ether (pre-cooled to about 0 C.) was added. (0274) The mixture was vortexed, and then placed in the refrigerator (about -4 C.) for 1 h, centrifuged for 5 min at 2800 rpm, and the ether layer was decanted. (0275) The peptide was washed with 90 mL of cold diethyl ether (pre-cooled to about 0 C.), vortexed, centrifuged for 5 min at 2800 rpm, and ether layer decanted. (0276) The resulting solid was dissolved in 50% AcOH/H2O and stored at room temperature overnight. (0277) The crude peptide solution was concentrated to afford solid crude peptide for HPLC purification. (0278) After HPLC purification, the peptide TFA salt was converted to peptide acetate salt using ion exchange (×100 eq.). The anion exchange resin used was Dowex SBR LC NG, OH-form (Supelco, Cat14036-U). |



[ 143824-78-6 ]

[ 147290-11-7 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 79% | General procedure: In a SPPS tube, CTC resin (CAS 42074-68-0, commercially available from Chemlmpex, catalogue number 04250, 1.0-1.7 meqlg,1.O equiv.) was mixed with a solution of a selected Fmoc-protected amino acid (1.1 equiv.) and DIPEA (6 equiv.) in a mixed solvent of DMF/DCM (1:10 v/v7 12 ml/mmol of CTC resin). The mixture was shaken at r.t. for 5 h. Anhydrous methanol (16 equiv.) was then added to cap any unreacted CTCresin. After being shaken at r.t. for another 30 mm, the resin was filtered out, washed with DMF (3x10 ml), DCM (3x10 ml), MeOH (3x10 ml), and DMF (3x10 ml). For Fmoc removal the resin was then treated with 20% v/v piperidine in DMF (10 ml) at r.t. on a shaking bed for 30 mm. The resin was then filtered, washed with DMF (3x10 ml), DCM (3x1 0 ml), MeOH (3x1 0 ml) and dried completely under vacuum to afford the CTC resin15 bound amino acid, which was used in solid phase synthesis directly without any furtherpurification. The resin loading rate was estimated based on the weight increase compared to the non-loaded CTC resin.; rP-Fmoc-N6-allyloxycarbonyl-L-ornithine (1.0 equiv) was loaded onto CTC resin using Method B. In a SPPS tube the resin-bound N6-allyloxycarbonyl-L-ornithine was mixed with an N-protected amino acid (1.2 equiv.), HBTU (1.2 equiv.) and DMF (12 ml/mmol), and shaken at r.t. on a shaking bed for about 1 h or until LC-MS indicated the completion of the reaction using Method A. The resin was filtered, washed with DMF(3x10 ml), DCM (3x10 ml) and MeOH (3x10 ml), then dried undervacuum.Alloxycarbonyl removalThe resin-bound dipeptide (1.0 equiv) was transferred to a round bottom flask equipped with magnetic stirrer. Under an atmosphere of nitrogen, DCM (8-9 ml/mmol), phenylsilane (16 equiv.) and tetrakis(triphenylphosphine)palladium (0.12 equiv.) were added sequentially. The resulting mixture was gently stirred (about 50 rpm) at r.t. for 1 h under N2, then the resin-bound product was filtered, washed with DCM (3x10 ml), DMF (3x10 ml) and MeOH (3x10 ml), then dried under vacuum to afford the resin-bound dipeptide with a free ornithine 5-amino group.Further coupling of amino acidsThe resin-bound dipeptide with a free ornithine 5-amino group was transferred into aSPPS tube, then a Fmoc-protected amino acid (1.5 equiv.), HBTU (1.5 equiv.), DMF(12 ml) and DIPEA (3 equiv.) were added. The SPPS tube was capped and shaken atr.t. on a shaking bed for 2 h or until LC-MS indicated completion of the reaction usingMethod A. The reaction solution was then removed from the SPPS tube by vacuum filtration to afford the resin-bound product, which was rinsed with DMF (3x10 ml), DCM (3x10 ml), MeOH (3x10 ml) and DMF (3x10 ml). For FMOC removal, the resin was subsequently treated with 10 ml of 20% v/v piperidine in DMF at r.t. and placed on ashaking bed for 30 mm or until LC-MS indicated completion of the reaction using Method A. The resin was vacuum filtered and rinsed with DMF (3x12 ml), DCM (3x12 ml) and MeOH (3x10 ml), then dried under vacuum to afford the resin-bound peptide with a free terminal amino group, which was used directly in the next amino acidcoupling reaction without any further purification.The above coupling/de-Fmoc procedure was repeated three more times, each time using a different amino acid respectively to afford the CTC resin-bound linear hexapeptide sequence with a free terminal amino group.; The resin-bound pentapeptide or hexapeptide was treated with a solution of HFIPA in DCM (20% v/v7 12 ml/mmol of loaded resin) in an SPPS tube with shaking on a shaking bed at r.t. for 30 mm. The resin was filtered off and the filtrate collected. Volatiles were evaporated under vacuum to afford the linear pentapeptide or hexapeptide.; Following Method B, was loaded onto 2- chlorotrityl resin (CTC resin, 1.0 meq, 1.0 g, 1.0 mmol) and subsequently treated with piperidine in DMF (20% v/v) to afford the CTC resin-bound N6-allyloxycarbonyl-L-ornithine (1.0 mmol).The hexapeptide linear sequence was subsequently assembled by following the coupling and Fmoc removal procedures described in Method F using sequentially Na (((9H-fluoren-9-yl)methoxy)carbonyl)-N1?-((2,2,4,6, 7-pentamethyl-2,3-dihydrobenzofuran-5-yl)sulfonyl)-L-arginine (973 mg, 1 .5 equiv.), Na(((9Hfluoren9 yl)methoxy)carbonyl)-1 -(tert-butoxycarbonyl)-L-tryptophan (790 mg, 1.5 equiv.), N-(9- fluorenylmethyloxycarbonyl)-3-(cis-4-hydroxycyclohexyl)-D-alanine (614 mg, 1.3 equiv.), and (2S,4R)-1 -(((9H-fluoren-9-yl)methoxy)carbonyl)-4-(2-(tert-butoxy)-2- oxoethoxy)pyrrolidine-2-carboxylic acid (701 mg, 1.5 equiv.) to afford the linearhexapeptide on resin. This resin-bound product was subjected to cleavage conditions described in general procedure H to afford the linear hexapeptide as a white solid, 775 mg, 79%. LC-MS (Method A, 3 mm run) tR 1.97 mm, ESI+[M+H] calculated for C80H118N2020S 1585.9; found 1585.8. |


[ 143824-78-6 ]

[ 147290-11-7 ]
[ 266359-42-6 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 78% | In an SPPS vessel equipped with an overhead mechanical stirrer, CTC resin (1.0-1.7meq/g,1 .0 equiv.) was mixed with a solution of a selected Fmoc-protected amino acid(1.1 equiv.) and DIPEA (6 equiv.) in a mixed solvent of DMF/DCM (1:10 v/v76.6 ml/mmol of CTC resin). The mixture was gently stirred at r.t. for 5 h. Anhydrousmethanol (16 equiv.) was added to cap any unreacted CTC resin. After being stirred atr.t. for another 30 mm, the solution was removed from the resin by vacuum filtration.The resin-bound product was washed with DMF (3x200 ml), DCM (3x200 ml), MeOH(3x200 ml), and DMF (3x200 ml). For Fmoc removal the resin was then treated with20% v/v piperidine in DMF (300 ml) at r.t. with gentle stirring for 30 mm. The resin wasthen filtered under vacuum, washed with DMF (3x200 ml), DCM (3x200 ml), MeOH (3x100 ml) and dried completely under vacuum to afford the CTC resin-bound amino acid which was used in solid phase synthesis directly without any further purification. The resin loading rate was estimated based on the weight increase compared to the non-loaded resin.; The resin-bound pentapeptide or hexapeptide was treated with a solution of HFIPA inDCM (20% v/v7 12 ml/mmol of substrate) in an SPPS vessel with gentle stirring at r.t. for30 mm. The mixture was filtered and filtrate collected. The resin was treated withanother identical volume of 20% v/v HFIPA in DCM at r.t. upon gentle stirring for another 30 mm, and filtered again. The filtrates were combined and evaporated under vacuum to dryness to afford the linear pentapeptide or hexapeptide.; (1.0 equiv.) was loaded onto CTC resin using Method C. In a SPPS vessel equipped with overhead mechanical stirrer, the resin15 bound N6-allyloxycarbonyl-L-ornithine was mixed with a N-protected amino acid(1.3 equiv), HBTU (1.3 equiv.) and DMF (6-6.6 ml/mmol of loaded resin). The mixture was gently stirred at r.t. for about 2 h or until LC-MS indicated the completion of the reaction using Method A. The resin was filtered, washed with DMF (3x200 ml), DCM (3x200 ml) and MeOH (3x100 ml), then dried under vacuum.; Loading.Following Method C, (33.6 g, 76 mmol, 1.5equiv.), CTC resin (1.7 meq, 30.0 g, 51.1 mmol, 1.0 equiv.), DIPEA (72 ml, 406 mmol, 8equiv.) and a mixed solvent of DMF and DCM (1:10 v/v7 330 ml) were used. Themixture was gently stirred at r.t. for 5 h and capped by addition of MeOH (33 ml). Loading rate was estimated to be 81% or 41.3 mmol, based on weight increase of the resin. The resin was then treated with piperidine in DMF (20% v/v) to remove the Fmoc group to afford the CTC resin-bound N6-allyloxycarbonyl-L-ornithine.Side chain amino acid installation.CTC resin-bound N6-allyloxycarbonyl-L-ornithine (46.6 g, 41.3 mmol), N-(2-(tert-butoxy)-2-oxoethyl)-N-(tert-butoxycarbonyl)-L-phenylalanine (20.4 g, 53.7 mmol, 1.30 equiv.),HBTU (21.0 g, 53.7 mmol, 1.30 equiv.), DIPEA (22.6 ml, 128 mmol, 3.1 equiv.) andDMF (250 ml) were gently stirred at r.t. for 120 mm when LC-MS (Method A) indicatedcompletion of the reaction. LC-MS (Method A, 3 mm run): tR 1.92 mm, ESI- [M-H] calculated for C29H41N309 576.6; found 576.5.Alloxycarbonyl removal.The resin-bound dipeptide (S)-5-(((allyloxy)carbonyl)am ino)-2-((S)-2-((2-(tert-butoxy)-2- oxoethyl)(tert-butoxycarbonyl)am ino)-3-phenylpropanam ido)pentanoic acid (47.7 g, 34.2 mmol, 1.0 equiv.) was suspended in DCM (285 ml). The mixture was stirred with phenylsilane (70 ml, 547 mmol, 16 equiv.) and tetrakis(triphenylphosphine)palladium (4.74 g, 4.10 mmol, 0.12 equiv.) at r.t. for 1 h when LC-MS (Method A) indicatedcompletion of the reaction. The resin was filtered out, washed, dried to afford resin- bound (S)-5-am ino-2-((S)-2-((2-(tert-butoxy)-2-oxoethyl)(tert-butoxycarbonyl)am ino)-3- phenylpropanamido)pentanoic acid. LC-MS (Method A, 3 mm run): tR 1.22 mm, ESI[M-H] calculated for C25H37N307 491.6; found 492.4.Further coupling of amino acids and cleavage of linear peptide from the resin.Preparation of (3R,6S,9S, 1 5S)-1 5-((S)-2-((2-(tert-butoxy)-2-oxoethyl)(tert-butoxycarbonyl)am ino)-3-phenylpropanam ido)-1 -((2S,4R)-4-(tert-butoxy)pyrrolidin-2-yl)- 6-((1 -(tert-butoxycarbonyl)-1 H-indol-3-yl)methyl)-3-(((1 s,4S)-4-hydroxycyclohexyl)methyl)-1 4,7,1 0-tetraoxo-9-(3-(3-((2,2,4,6,7-pentamethyl-2,3-dihydrobenzofuran-5-yI)sulfonyl)guanidino)propyl)-2,5,8,1 1 -tetraazahexadecan-1 6-oic acid (the linear hexapeptide).Resin-bound (S)-5-am ino-2-((S)-2-((2-(tert-butoxy)-2-oxoethyl)(tert-butoxycarbonyl)amino)-3-phenylpropanamido)pentanoic acid (28.5 mmol, 1.0 equiv.) was subject to the solid phase coupling and Fmoc removal procedures described in Method G sequentially with pentamethyl-2,3-dihydrobenzofuran-5-yl)sulfonyl)-L-arginine (33.3 g, 42 mmol, 1.5 equiv.), -(tert-butoxycarbonyl)-L-tryptophan(30.0 g, 57 mmol, 2.0 equiv.), N-(9-Fluorenylmethyloxycarbonyl)-3-(cis-4- hydroxycyclohexyl)-D-alanine (15.2 g, 37 mmol, 1.3 equiv.), and trans-3-t-butoxy-N-(9- fluorenylmethyloxycarbonyl)-L-proline (15.2 g, 37 mmol, 1.3 equiv.) to afford the... |


[ 143824-78-6 ]

[ 221352-74-5 ]
[ 147290-11-7 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 100% | General procedure: In an SPPS vessel equipped with an overhead mechanical stirrer, CTC resin (1.0-1.7meq/g,1 .0 equiv.) was mixed with a solution of a selected Fmoc-protected amino acid(1.1 equiv.) and DIPEA (6 equiv.) in a mixed solvent of DMF/DCM (1:10 v/v76.6 ml/mmol of CTC resin). The mixture was gently stirred at r.t. for 5 h. Anhydrousmethanol (16 equiv.) was added to cap any unreacted CTC resin. After being stirred atr.t. for another 30 mm, the solution was removed from the resin by vacuum filtration.The resin-bound product was washed with DMF (3x200 ml), DCM (3x200 ml), MeOH(3x200 ml), and DMF (3x200 ml). For Fmoc removal the resin was then treated with20% v/v piperidine in DMF (300 ml) at r.t. with gentle stirring for 30 mm. The resin wasthen filtered under vacuum, washed with DMF (3x200 ml), DCM (3x200 ml), MeOH (3x100 ml) and dried completely under vacuum to afford the CTC resin-bound amino acid which was used in solid phase synthesis directly without any further purification. The resin loading rate was estimated based on the weight increase compared to the non-loaded resin.; (1.0 equiv.) was loaded onto CTC resin using Method C. In a SPPS vessel equipped with overhead mechanical stirrer, the resin15 bound N6-allyloxycarbonyl-L-ornithine was mixed with a N-protected amino acid(1.3 equiv), HBTU (1.3 equiv.) and DMF (6-6.6 ml/mmol of loaded resin). The mixture was gently stirred at r.t. for about 2 h or until LC-MS indicated the completion of the reaction using Method A. The resin was filtered, washed with DMF (3x200 ml), DCM (3x200 ml) and MeOH (3x100 ml), then dried under vacuum. Alloxycarbonyl removalTo the SPPS vessel containing the resin-bound dipeptide (1.0 equiv) was added DCM(8-9 ml/mmol), phenyl silane (16 equiv.) and tetrakis(triphenylphosphine)palladium(0.12 equiv.) sequentially. The resulting mixture was gently stirred (about 50 rpm) at r.t.for 1 h under N2 The resin-bound product was filtered, washed with DCM (3x200 ml),DMF (3x200 ml) and MeOH (3x100 ml) and then dried under vacuum to afford the resin- bound dipeptide with a free ornithine 5-amino group.Further coupling of amino acidsTo the SPPS vessel containing the resin-bound dipeptide with a free ornithine 5-amino group was added a Fmoc-protected amino acid (1.5 equiv.), HBTU (1.5 equiv.), DMF (6-7 ml/mmol of loaded resin) and DIPEA (3 equiv.). The mixture was stirred gently at r.t. for 2 h or until LC-MS indicated completion of the reaction using Method A. The reaction solution was then removed from the SPPS vessel by vacuum filtration to affordthe resin-bound product, which was rinsed with DMF (3x200 ml), DCM (3x200 ml), MeOH (3x100 ml) and DMF (3x100 ml). For FMOC removal, the resin was subsequently treated with 20% v/v piperidine in DMF (8-9 ml/mmol of loaded resin) at r.t. with gentle stirring for 30 mm or until LC-MS indicated completion of the reactionusing Method A. The resin was vacuum filtered and rinsed with DMF (3x200 ml), DCM (3x200 ml) and MeOH (3x100 ml), then dried under vacuum to afford the resin-bound peptide with a free terminal amino group, which was used directly in the next amino acid coupling reaction without any further purification.The above coupling/de-Fmoc procedure was repeated three more times, each time using a different amino acid respectively to afford the CTC resin-bound linear hexapeptide sequence with a free terminal amino group.; The resin-bound pentapeptide or hexapeptide was treated with a solution of HFIPA inDCM (20% v/v7 12 ml/mmol of substrate) in an SPPS vessel with gentle stirring at r.t. for30 mm. The mixture was filtered and filtrate collected. The resin was treated withanother identical volume of 20% v/v HFIPA in DCM at r.t. upon gentle stirring for another 30 mm, and filtered again. The filtrates were combined and evaporated under vacuum to dryness to afford the linear pentapeptide or hexapeptide.; Following Method C, was loaded onto 2- chlorotrityl resin (CTC resin, 1.0 meq, 3.0 g, 3.0 mmol) and subsequently treated with piperidine in DMF (20% v/v) to afford the CTC resin-bound N6-allyloxycarbonyl-L- ornithine (3.0 mmol).The hexapeptide linear sequence was subsequently assembled by following theprocedures described in Method G using sequentially N-(2-(tert-butoxy)-2-oxoethyl)-N-(tert-butoxycarbonyl)-L-phenylalanine (1.71 g, 4.5 mmol, 1.5 equiv.), Na(((9Hfluoren9yl)methoxy)carbonyl)-N1?-((2,2,4,6, 7-pentamethyl-2, 3-dihydrobenzofuran-5-yl)sulfonyl)-L-arginine (2.92 g, 4.5 mmol, 1.5 equiv.),(tert-butoxycarbonyl)-L-tryptophan (1.92 g, 4.5 mmol, 1.5 equiv.), N-(9-fluorenylmethyloxycarbonyl)-3-(cis-4-hydroxycyclohexyl)-D-alanine (1.80 g, 4.5 mmol,1.5 equiv.) and (2S,4S)-i -(((9H-fluoren-9-yl)methoxy)carbonyl)-4-((tert-butoxycarbonyl)amino)pyrrolidine-2-carboxylic acid (2.03 g, 4.5 mmol, 1.5 equiv.) toafford the resin-bound linear hexapeptide. This resin-bound product was subject to thecleavage conditions described in Method I to afford the linear hexapeptide as an oil,4.41 g, 100%. LC-MS (... |
[ 35661-39-3 ]
[ 122889-11-6 ]
[ 71989-31-6 ]
[ 71989-23-6 ]
[ 35737-15-6 ]
[ 71989-31-6 ]
[ 117872-75-0 ]
[ 161420-87-7 ]
[ 147290-11-7 ]

[ 29022-11-5 ]
[ 68858-20-8 ]
[ 35661-60-0 ]
[ 35661-39-3 ]

[ 71989-31-6 ]
[ 35661-40-6 ]
[ 71989-33-8 ]
[ 71989-14-5 ]
[ 71989-18-9 ]
[ 71989-23-6 ]
[ 71989-26-9 ]
[ 71989-35-0 ]
[ 71989-28-1 ]
[ 132388-59-1 ]
[ 132327-80-1 ]
[ 109425-51-6 ]
[ 143824-78-6 ]

[ 147290-11-7 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 47 mg | Taking 5g Fmoc-Rink MBHA Amide resin, 20% piperidine/DMF was used for the removal of Fmoc, HOBT/DIC was used as the coupling reagent, and the reactive solvent was DMF. The reaction was monitored by employing the ninhydrin detection method, successively connecting the following protected amino acids onto Rink MBHA Amide resin: <strong>[147290-11-7]<strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>-OH</strong>, Fmoc-Ser(tBu)-OH, Fmoc-Pro-OH, Fmoc-Pro-OH, Fmoc-Pro-OH, Fmoc-Ala-OH, Fmoc-Gly-OH, Fmoc-Ser(tBu)-OH, Fmoc-Ser(tBu)-OH, Fmoc-Pro-OH, Fmoc-Gly-OH, Fmoc-Gly-OH, Fmoc-Asn(Trt)-OH, Fmoc-Lys(Boc)-OH, Fmoc-Leu-OH, Fmoc-Trp(Boc)-OH, Fmoc-Glu(OtBu)-OH, Fmoc-Ile-OH, Fmoc-Phe-OH, Fmoc-Leu-OH, Fmoc-Arg (Pbf)-OH, Fmoc-Val-OH, Fmoc-Ala-OH, Fmoc-Glu(OtBu)-OH, Fmoc-Glu(OtBu)-OH, Fmoc-Glu(OtBu)-OH, Fmoc-Met-OH, Fmoc-Gln(Trt)-OH, Fmoc-Lys(Boc)-OH, Fmoc-Ser(tBu)-OH, Fmoc-Leu-OH, Fmoc-Asp(OtBu)OH, Fmoc-Ser(tBu)-OH, Fmoc-Thr(tBu)-OH, Fmoc-Phe-OH, Fmoc-Thr(tBu)-OH, Fmoc-Gly-OH, Fmoc-Glu(OtBu)-OH, Fmoc-Gly-OH, Fmoc-His(Trt)-OH, (Boc)2O (using DIEA, dichloromethane). They were washed with DMF, washed with methanol, washed with dichloromethane, and then dried to give 7.8g Exendin-4(1-39)-Orn40(Alloc)-NH2 resin. 1.5g Exendin-4(1-39)-Orn40(Alloc)-NH2 resin was swelled in DMF, into which was then added 3eq solution of Pd (PPh3)4 in CHCl3: AcOH:NMM (18:1:0.5). They were reacted for 2h, then washed with chloroform (6 times, 20ml chloroform for each time), 20% solution of HOAc in dichloromethane (6 times, 20ml 20% solution of HOAc in dichloromethane for each time), washed with dichloromethane (6 times, 20ml dichloromethane for each time) and washed with DMF (6 times, 20ml DMF for each time). When it was detected with ninhydrin as positive, 5ml DMF, 528mg compound BP103m53, 150mg HOAT, 150ul DIC were reacted for 4h; and when it was detected with ninhydrin as negative, indicting that the side chain BP103m53 has connected onto Exendin-4(1-39)-Orn40-NH2 resin. The pyrolysis of the resin was carried out by employing 82.5% TFA/5% phenol/5% water/2.5% EDT/5% thioanisole, and then they were precipitated with ice-cold methyl tert-butyl ether (MTBE), and washed. Crude products were purified by HPLC to give 47mg target compound. MS(ESI+, m/e): 5104.72[M+H]+ |
[ 29022-11-5 ]
[ 68858-20-8 ]
[ 35661-60-0 ]
[ 35661-39-3 ]

[ 71989-31-6 ]
[ 35661-40-6 ]
[ 71989-33-8 ]
[ 71989-14-5 ]
[ 71989-18-9 ]
[ 71989-23-6 ]
[ 71989-26-9 ]
[ 71989-35-0 ]
[ 71989-28-1 ]
[ 132388-59-1 ]
[ 132327-80-1 ]
[ 109425-51-6 ]
[ 143824-78-6 ]

[ 147290-11-7 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 41 mg | Taking 5g Fmoc-Rink MBHA Amide resin, 20% piperidine/DMF was used for the removal of Fmoc, HOBT/DIC was used as the coupling reagent, and the reactive solvent was DMF. The reaction was monitored by employing the ninhydrin detection method, successively connecting the following protected amino acids onto Rink MBHA Amide resin: <strong>[147290-11-7]<strong>[147290-11-7]Fmoc-Orn(Alloc)</strong>-OH</strong>, Fmoc-Ser(tBu)-OH, Fmoc-Pro-OH, Fmoc-Pro-OH, Fmoc-Pro-OH, Fmoc-Ala-OH, Fmoc-Gly-OH, Fmoc-Ser(tBu)-OH, Fmoc-Ser(tBu)-OH, Fmoc-Pro-OH, Fmoc-Gly-OH, Fmoc-Gly-OH, Fmoc-Asn(Trt)-OH, Fmoc-Lys(Boc)-OH, Fmoc-Leu-OH, Fmoc-Trp(Boc)-OH, Fmoc-Glu(OtBu)-OH, Fmoc-Ile-OH, Fmoc-Phe-OH, Fmoc-Leu-OH, Fmoc-Arg (Pbf)-OH, Fmoc-Val-OH, Fmoc-Ala-OH, Fmoc-Glu(OtBu)-OH, Fmoc-Glu(OtBu)-OH, Fmoc-Glu(OtBu)-OH, Fmoc-Met-OH, Fmoc-Gln(Trt)-OH, Fmoc-Lys(Boc)-OH, Fmoc-Ser(tBu)-OH, Fmoc-Leu-OH, Fmoc-Asp(OtBu)OH, Fmoc-Ser(tBu)-OH, Fmoc-Thr(tBu)-OH, Fmoc-Phe-OH, Fmoc-Thr(tBu)-OH, Fmoc-Gly-OH, Fmoc-Glu(OtBu)-OH, Fmoc-Gly-OH, Fmoc-His(Trt)-OH, (Boc)2O (using DIEA, dichloromethane). They were washed with DMF, washed with methanol, washed with dichloromethane, and then dried to give 7.8g Exendin-4(1-39)-Orn40(Alloc)-NH2 resin. (0197) 1.5g Exendin-4(1-39)-Orn40(Alloc)-NH2 resin was swelled in DMF, into which was then added 3eq solution of Pd(PPh3)4 in CHCl3: AcOH:NMM (18:1:0.5). They were reacted for 2h, then washed with chloroform (6 times, 20ml chloroform for each time), washed with 20% solution of HOAc in dichloromethane (6 times, 20ml 20% solution of HOAc in dichloromethane for each time), washed with dichloromethane (6 times, 20ml dichloromethane for each time) and washed with DMF (6 times, 20ml DMF for each time). When it was detected with ninhydrin as positive, 5ml DMF, 415mg compound BP103m60, 150mg HOAT, and 150ul DIC were added and reacted for 4h; and when it was detected with ninhydrin as negative, indicting that the side chain BP103m60 has connected onto Exendin-4(1-39)-Orn40-NH2 resin. The pyrolysis of the resin was carried out by employing 82.5% TFA/5% phenol/5% water/2.5% EDT/5% thioanisole, and then they were precipitated with ice-cold methyl tert-butyl ether (MTBE), and washed. Crude products were purified by HPLC to give 41mg target compound. MS(ESI+, m/e): 4915.61[M+H]+ |