Structure of Fmoc-1-Nal-OH
CAS No.: 96402-49-2
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| CAS No. : | 96402-49-2 |
| Formula : | C28H23NO4 |
| M.W : | 437.49 |
| SMILES Code : | [H][C@@](CC1=CC=CC2=C1C=CC=C2)(NC(=O)OCC1C2=C(C=CC=C2)C2=C1C=CC=C2)C(O)=O |
| MDL No. : | MFCD00151914 |
| InChI Key : | ORWNVJDLEMVDLV-SANMLTNESA-N |
| Pubchem ID : | 2734474 |
| GHS Pictogram: |
|
| Signal Word: | Warning |
| Hazard Statements: | H315-H319-H335 |
| Precautionary Statements: | P261-P305+P351+P338 |
| Num. heavy atoms | 33 |
| Num. arom. heavy atoms | 22 |
| Fraction Csp3 | 0.14 |
| Num. rotatable bonds | 8 |
| Num. H-bond acceptors | 4.0 |
| Num. H-bond donors | 2.0 |
| Molar Refractivity | 127.16 |
| TPSA ? Topological Polar Surface Area: Calculated from |
75.63 Ų |
| Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
2.8 |
| Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
5.89 |
| Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
5.37 |
| Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
4.06 |
| Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
5.09 |
| Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
4.64 |
| Log S (ESOL):? ESOL: Topological method implemented from |
-6.23 |
| Solubility | 0.000259 mg/ml ; 0.000000591 mol/l |
| Class? Solubility class: Log S scale |
Poorly soluble |
| Log S (Ali)? Ali: Topological method implemented from |
-7.25 |
| Solubility | 0.0000245 mg/ml ; 0.000000056 mol/l |
| Class? Solubility class: Log S scale |
Poorly soluble |
| Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-9.01 |
| Solubility | 0.00000043 mg/ml ; 0.000000001 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) |
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) |
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) |
No |
| Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-4.79 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 |
1.0 |
| 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 |
0.0 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) |
4.18 |
* 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.

[ 66-77-3 ]
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| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| Each of the reaction wells contained 0.0675 mmol of Rink Amide MBHA resin(substitution = 0.72 mmol/g, Novabiochem, San Diego, CA). The following Fmoc amino acids (Novabiochem, San Diego, CA; Chem-Impex International, Wood Dale, IL; SyntheTech, Albany, OR; Pharma Core, High Point, NC) were used: Fmoc-Lys(Boc)-OH, EPO <DP n="112"/>Fmoc-Phe-OH, Fmoc-H-Inp-OH, Fmoc-D-lNal-OH, Fmoc-D-2Nal-OH, Fmoc-D- TrP(BoC)-OH, Fmoc-3Pal-OH, Fmoc-4Pal-OH/ FmOc-Om(BoC)-OH, Fmoc-D-Bip-OH, FmOC-ThT(BzI)-OH, Fmoc-Pff-OH, Fmoc-2Thi-OH, Fmoc-Taz-OH, Fmoc-D-Dip-OH, Fmoc-D-Bpa-OH, Fmoc-D-Bal-OH, and Fmoc-Apc(Boc)-OH.Each of the Fmoc amino acids was dissolved in a 0.3 N solution of HOBt in DMF wherein the concentration of the resulting Fmoc amino acid was 0.3 N. A four fold excess (0.27 mmol, 0.9 mL of the 0.3 N solution) of Fmoc amino acid was used for each coupling. DIC (0.27 mmol, 0.6 mL of 0.45N DIC solution in DMF) was used as the coupling reagent for each coupling. Deprotection was performed by using 20percent piperidine in DMF (2 X 1.5 mL per residue). The peptides were cleaved from the resin by treating the peptide-resins with 8percent trsopropylsilane (TIP) in trifluoroacetic acid (TFA) (1.5 mL per reaction well) at room temperature for 2h. The resin was removed by filtration. Each filtrate was diluted to 25 mL with ether in a centrifuge tube. The resulting precipitate in each tube was centrifuged and the solvents were decanted from the precipitate. The precipitate in each tube was then dissolved in methanol (3 mL) and diluted with water (1 mL). The purification of the crude products was done on a reverse-phase preparative HPLC using a column (100 X 21.20 mm, 5mu) of LUNA 5mu C8(2) (Phenomenex, Torrance, CA). For each peptide, the column was eluted with a linear gradient from 85percent A and 15percent B to 25percent A and 75percent B in 15 min with a flow rate of 25 mL/min. A was 0.1percent TFA in water and B was 0.1percent TFA in acetonitrile/water (80/20, v/v). The fractions were checked by analytical HPLC and those containing the pure product were combined and lyophilized to dryness.Yields ranged from 13percent to 71percent and purity of each of Examples 1 - 65 exceeded 94percent based upon analytical HPLC analysis. Electro-spray ionization mass spectrometry (ES-MS) analysis was performed and observed molecular weights were in agreement with calculated molecular weights. The results are detailed in Table I, below |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| With benzotriazol-1-ol; In dichloromethane; for 0.166667h; | The forgoing solution of the intermediate product IB was divided into four equal portions and coupled with the pre-activated HOBT esters of FMOC protected amino acids, as summarized in reaction schemes 1C, ID, IE, and IF, below. The amino acid used: FMOC-D-2Nal-OH (130mg, 0.30mmole) (Synthetech Albany, Oregon) Each of the immediately foregoing amino acids was pre-activated with HOBT (46mg, 0.30mmole) and DIC (38mg, 0.30mmole) in DCM (5ml) for ten minutes before addition to one of the four portions of the forgoing solution of the intermediate product IB. The coupling reaction was then allowed to proceed for 30 minutes at room temperature. |

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| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| Example 9: Preparing the Tripeptide Ac-(D-Msa)-Val-Nal-NH2; A syringe was provided with 100 mg (0.06 mmol) of Rink amide resin; it was conditioned with CH2CL2 (5 x 1 min) and DMF (5 x 1 min). The synthesis was carried out by means of a standard Fmoc/tBu strategy, using diisopropylcarbodiimide (DIPCDI) as a coupling agent and hydroxybenzotriazole (HOBt) as an additive. Fmoc-3-(1-naphthyl)-L-Ala-OH (Fmoc-Nal) (78.75 mg, 0.18 mmol, 3 eq), Fmoc-L-Val-OH (61.2 mg, 0.18 mmol, 3 eq) and Fmoc-D-Mesityl alanine-OH (Fmoc-D-Msa) (77.4 mg, 0.18 mmol, 3 eq) were used, and the successive incorporation of amino acids was corroborated with ninhydrin tests. After incorporating the third amino acid, the Fmoc group was removed with a mixture of piperidine in DMF and the free amino end was acetylated with Ac2O - diisopropyldiethylamine (DIEA). The resin was finally filtered and thoroughly washed with DMF (5 x 1 min), CH2CL2 (5 x 1 min) and methanol (5 x 1 min). To cleave the tripeptide, it was treated with a trifluoroacetic-water-triisopropylsilane (TFA-H2O-TIS) (95:2.5:2.5) solution for 1 hour and the resulting filtrate was evaporated. It was characterized by reverse-phase chromatography (HPLC) and by EM. After 9 synthesis steps and with no intermediate purification; the obtained crude product had a 39percent purity. It was purified with a semi-preparative HPLC (gradient 20-50 in 10 min and 50-100 in 15 min) obtaining 3.4 mg of the tripeptide with an 86percent purity (lambda = 220 nm). HPLC-MS: tr (H2O 0.1percent HCOOH; ACN 0.07percent HCOOH)=4.830 min. ES+:545.65 (calc. C32H40N4O4, 544.30). |
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[ 1213773-24-0 ]| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 8.5% | General procedure: Dipeptidyl moieties were synthesized by using solid-phase peptide synthesis (SPPS). Rink Amide MBHA resin was swelled in 1.5 mL of DMF for 10 min. Then the Fmoc group was removed from resin by treatment with 1.5 mL of 20percent piperidine in DMF (2 x 10 min), followed by washing with 1.5 mL of DMF (3 times), 1.5 mL of DCM (5 times), and 1.5 mL of DMF (3 times). The resulting amine was treated with activated Fmoc-amino acid (6 equiv.), PyBOP ((benzotriazol-1-yloxy)tripyrrolidinophosphonium hexafluorophosphate, 6 equiv.), 100percent N,N-diisopropylethylamine(DIPEA , 6 equiv.) for 2 h in DMF followed by washing with 1.5 mL of DMF (3x), 1.5 mL of DCM (3x), 1.5 mL of DMF (3x). This procedure was repeated for the introduction of the second amino acid. In the synthesis of Butyrate-sp-X1X2, the pre-loaded dipeptide resin (50 mg, 0.028 mmol) was swelled for 10 min in 1.5 mL of DMF, treated with 1.5 mL of 20percent piperidine/DMF (2 x 10 min) and washed with 1.5 mL of DMF (3 times), 1.5 mL of DCM (3 times), and 1.5 ml of DMF (3 times). The resulting free amine resin was treated with 3 (15 mg, 2 equiv.), 2-(6-chloro-1H-benzotriazole-1-yl)-1,1,3,3-tetramethylaminium hexafluorophosphate (HCTU, 23.1 mg, 2 equiv.), hydroxybenzotriazole (HOBt, 7.5 mg, 2 equiv.) and DIPEA (30 mL, 6 equiv.) in 1.5 mL of DMF for 2 h and washed with 1.5 mL of DMF (3 times), 1.5 mL of DCM (3 times), and 1.5 of DMF (3 times). Resin bound Butyrate-sp-X1X2 was cleaved from the resin by treatment with the 1 mL of cleavage cocktail (TFA:H2O:TIS= 95:2.5:2.5) for 1 h, and purified by using reverse phase HPLC (Agilent 1100 series and 1260 series.) on a Zorbax C18 (3.5 mm, 4.6 x 150 mm) column. For the mobile phase, buffer A (water with 0.1percent v/v TFA) and buffer B (acetonitrile with 0.1percent v/v TFA) were used as a gradient. The gradient conditions are as follows: 5 min, 5percent B followed by linear gradient 5-70percent B over 30 min and 70-100percent for 30-40 min. The structures of individual library members were confirmed by using an Auto Flex II MALDI-TOF/TOF mass spectrometer (Bruker Daltonics, Germany). |
[ 1377324-42-9 ]
[ 96402-49-2 ]

[ 1377324-54-3 ]| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 15% | General procedure: Dipeptidyl moieties were synthesized by using solid-phase peptide synthesis (SPPS). Rink Amide MBHA resin was swelled in 1.5 mL of DMF for 10 min. Then the Fmoc group was removed from resin by treatment with 1.5 mL of 20percent piperidine in DMF (2 x 10 min), followed by washing with 1.5 mL of DMF (3 times), 1.5 mL of DCM (5 times), and 1.5 mL of DMF (3 times). The resulting amine was treated with activated Fmoc-amino acid (6 equiv.), PyBOP ((benzotriazol-1-yloxy)tripyrrolidinophosphonium hexafluorophosphate, 6 equiv.), 100percent N,N-diisopropylethylamine(DIPEA , 6 equiv.) for 2 h in DMF followed by washing with 1.5 mL of DMF (3x), 1.5 mL of DCM (3x), 1.5 mL of DMF (3x). This procedure was repeated for the introduction of the second amino acid. In the synthesis of Butyrate-sp-X1X2, the pre-loaded dipeptide resin (50 mg, 0.028 mmol) was swelled for 10 min in 1.5 mL of DMF, treated with 1.5 mL of 20percent piperidine/DMF (2 x 10 min) and washed with 1.5 mL of DMF (3 times), 1.5 mL of DCM (3 times), and 1.5 ml of DMF (3 times). The resulting free amine resin was treated with 3 (15 mg, 2 equiv.), 2-(6-chloro-1H-benzotriazole-1-yl)-1,1,3,3-tetramethylaminium hexafluorophosphate (HCTU, 23.1 mg, 2 equiv.), hydroxybenzotriazole (HOBt, 7.5 mg, 2 equiv.) and DIPEA (30 mL, 6 equiv.) in 1.5 mL of DMF for 2 h and washed with 1.5 mL of DMF (3 times), 1.5 mL of DCM (3 times), and 1.5 of DMF (3 times). Resin bound Butyrate-sp-X1X2 was cleaved from the resin by treatment with the 1 mL of cleavage cocktail (TFA:H2O:TIS= 95:2.5:2.5) for 1 h, and purified by using reverse phase HPLC (Agilent 1100 series and 1260 series.) on a Zorbax C18 (3.5 mm, 4.6 x 150 mm) column. For the mobile phase, buffer A (water with 0.1percent v/v TFA) and buffer B (acetonitrile with 0.1percent v/v TFA) were used as a gradient. The gradient conditions are as follows: 5 min, 5percent B followed by linear gradient 5-70percent B over 30 min and 70-100percent for 30-40 min. The structures of individual library members were confirmed by using an Auto Flex II MALDI-TOF/TOF mass spectrometer (Bruker Daltonics, Germany). |
[ 1377324-42-9 ]
[ 96402-49-2 ]

[ 1377324-53-2 ]| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 9.5% | General procedure: Dipeptidyl moieties were synthesized by using solid-phase peptide synthesis (SPPS). Rink Amide MBHA resin was swelled in 1.5 mL of DMF for 10 min. Then the Fmoc group was removed from resin by treatment with 1.5 mL of 20percent piperidine in DMF (2 x 10 min), followed by washing with 1.5 mL of DMF (3 times), 1.5 mL of DCM (5 times), and 1.5 mL of DMF (3 times). The resulting amine was treated with activated Fmoc-amino acid (6 equiv.), PyBOP ((benzotriazol-1-yloxy)tripyrrolidinophosphonium hexafluorophosphate, 6 equiv.), 100percent N,N-diisopropylethylamine(DIPEA , 6 equiv.) for 2 h in DMF followed by washing with 1.5 mL of DMF (3x), 1.5 mL of DCM (3x), 1.5 mL of DMF (3x). This procedure was repeated for the introduction of the second amino acid. In the synthesis of Butyrate-sp-X1X2, the pre-loaded dipeptide resin (50 mg, 0.028 mmol) was swelled for 10 min in 1.5 mL of DMF, treated with 1.5 mL of 20percent piperidine/DMF (2 x 10 min) and washed with 1.5 mL of DMF (3 times), 1.5 mL of DCM (3 times), and 1.5 ml of DMF (3 times). The resulting free amine resin was treated with 3 (15 mg, 2 equiv.), 2-(6-chloro-1H-benzotriazole-1-yl)-1,1,3,3-tetramethylaminium hexafluorophosphate (HCTU, 23.1 mg, 2 equiv.), hydroxybenzotriazole (HOBt, 7.5 mg, 2 equiv.) and DIPEA (30 mL, 6 equiv.) in 1.5 mL of DMF for 2 h and washed with 1.5 mL of DMF (3 times), 1.5 mL of DCM (3 times), and 1.5 of DMF (3 times). Resin bound Butyrate-sp-X1X2 was cleaved from the resin by treatment with the 1 mL of cleavage cocktail (TFA:H2O:TIS= 95:2.5:2.5) for 1 h, and purified by using reverse phase HPLC (Agilent 1100 series and 1260 series.) on a Zorbax C18 (3.5 mm, 4.6 x 150 mm) column. For the mobile phase, buffer A (water with 0.1percent v/v TFA) and buffer B (acetonitrile with 0.1percent v/v TFA) were used as a gradient. The gradient conditions are as follows: 5 min, 5percent B followed by linear gradient 5-70percent B over 30 min and 70-100percent for 30-40 min. The structures of individual library members were confirmed by using an Auto Flex II MALDI-TOF/TOF mass spectrometer (Bruker Daltonics, Germany). |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| [0078] To a solution of amino acid (3 equivalents based on resin loading) and HATU (3 equivalents based on resin loading in NMP (5mL/mmole of amino acid) was added D PEA (6 equivalents based on resin loading). The reaction mixture was agitated for 5 minutes then added to a pre-swelled (with DMF) portion of resin in a solid phase reactor and stirred for 4 hours. The resin was filtered and washed with DMF, DCM, DMF, IP A, DMF, DCM and DMF. [00105] NovaPEG Rink Amide Resin (81.1mg, 3(^moles loading) was placed in an 8mL solid phase reactor. (S)-N-Fmoc-l-Naphthylalanine-OH (39.4mg, 9(^moles) was attached according to procedure (C) using HATU (34.2mg, 9(^moles), NMP (450mu1,) and DIPEA (31.4muIota,, 180mumoles). The terminal Fmoc group was removed according to procedure (J) using 20percent piperidine in DMF (900muEpsilon). |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| General procedure: Step c: To resin 4 was added Fmoc-D,L-homo-[ala-4-pip(N-Boc)] (1.5 equiv), TBTU (1.5 equiv), HOBT (1.5 equiv), and finally DIPEA (3.0 equiv) in DMF. The reaction slurry was shaken at rt for 3.5 h. The resin was filtered and rinsed with 6 x DMF and then with 3 x (1 x DCM + 1 x MeOH). Completion of the coupling was confirmed by Kaiser test (Kaiser, E.; Colescot, R. L.; Bossinge, C. D.; Cook, P.I. Anal. Biochem. 1970, 34, 595) on a few beads. The resin was dried under vacuum for 16 h and engaged in the next step. Step d: The resin was washed with 3 x DMF and subsequently treated at rt with a solution of DMF/1M TBAF in THF) 4:1 (v/v) for 3 x 2 minutes. The resin was then washed thoroughly with 6 x DMF, 2 x (DMF/H2O 1:1 (v/v), 2 x H2O, 2 x (DMF/H2O 1:1 (v/v), 2 x DMF and finally 3 x (1 x DCM + 1 x MeOH). The resin was dried under vacuum for 2 h and engaged in the next step. Step e: To the resin was added 13 (1.5 equiv), TBTU (1.5 equiv), HOBT(1.5 equiv), and finally DIPEA (3 equiv) in DMF. The reaction slurry was shaken at rt for 4 h. The resin was filtered and rinsed with 6 x DMF and then with 3 x (1 x DCM + 1 x MeOH). Completion of the coupling was confirmed by Kaiser test on a few beads. The resin was dried under vacuum for 16 h and engaged in the next step. Step f: The resin was treated with TFA/DCM/water 49:49:2 for 1 h. The resi nwas filtered and the treatment was repeated once. The resin was then rinsed thoroughly with cycles of MeCN and DCM. The combined solvent fractions were concentrated to give a crude which was purified by preparative HPLC(Kromasil C8, 10 lm, 250 21.2 mm ID, flow 20 mL/min., detection by UV at254 nm) using a gradient of solvent A: 95percent 0.1 M ammonium acetate/5percent MeCN in solvent B: MeCN. Relevant fraction were pooled and freeze-dried. |