Structure of 3-Iodobenzoic acid
CAS No.: 618-51-9
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The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
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CAS No. : | 618-51-9 |
Formula : | C7H5IO2 |
M.W : | 248.02 |
SMILES Code : | O=C(O)C1=CC=CC(I)=C1 |
MDL No. : | MFCD00002496 |
InChI Key : | KVBWBCRPWVKFQT-UHFFFAOYSA-N |
Pubchem ID : | 12060 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
Num. heavy atoms | 10 |
Num. arom. heavy atoms | 6 |
Fraction Csp3 | 0.0 |
Num. rotatable bonds | 1 |
Num. H-bond acceptors | 2.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 46.12 |
TPSA ? Topological Polar Surface Area: Calculated from |
37.3 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.03 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
3.13 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
1.99 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
2.52 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
2.18 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
2.17 |
Log S (ESOL):? ESOL: Topological method implemented from |
-3.73 |
Solubility | 0.0464 mg/ml ; 0.000187 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-3.58 |
Solubility | 0.0649 mg/ml ; 0.000262 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-2.73 |
Solubility | 0.465 mg/ml ; 0.00187 mol/l |
Class? Solubility class: Log S scale |
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 |
Yes |
P-gp substrate? P-glycoprotein substrate: SVM model built on 1033 molecules (training set) |
No |
CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) |
No |
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) |
No |
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) |
No |
Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-5.59 cm/s |
Lipinski? Lipinski (Pfizer) filter: implemented from |
0.0 |
Ghose? Ghose filter: implemented from |
None |
Veber? Veber (GSK) filter: implemented from |
0.0 |
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 |
1.0 alert: heavy_metal |
Leadlikeness? Leadlikeness: implemented from |
No; 1 violation:MW<1.0 |
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
1.46 |
* 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.
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. |
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. |
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. |
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. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
83% | With triphenyl phosphite; chloro(1,5-cyclooctadiene)rhodium(I) dimer; caesium carbonate; In toluene;Reflux; Inert atmosphere; | In a 250 ml reaction flask, 10 g of <strong>[186663-74-1]tert-butyl N-(2-hydroxyphenyl)carbamate</strong> and 13 g of 3-iodobenzoic acid were added.0.85 g RhCl(cod) 2, 1.5 g triphenyloxyphosphine, 46 g cesium carbonate and 100 ml toluene,The reaction was refluxed under nitrogen and the reaction was monitored by TLC.Add 100 ml of water, extract with ethyl acetate, dry and concentrate to give the product(13 g, yield: 83%, HPLC purity: 97%). |
Tags: 618-51-9 synthesis path| 618-51-9 SDS| 618-51-9 COA| 618-51-9 purity| 618-51-9 application| 618-51-9 NMR| 618-51-9 COA| 618-51-9 structure
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