(2S)-2-aminopropanamide

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 4-[3-(1-quinolin-6-ylcyclopropyl)[1,2,4]triazolo[4,3-b][1,2,4]triazin-6-yl]benzoic acid (10 mg, 0.02 mmol), (2S)-2-aminopropanamide (3.2 mg, 0.037 mmol), benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (13 mg, 0.029 mmol), and N,N-diisopropylethylamine (13 μL, 0.073 mmol) in methylene chloride (0.5 mL) was stirred at RT overnight. The solvent was evaporated. The residue was dissolved in methanol, and purified by RP-HPLC (pH=10) to afford the desired product. Analytical LCMS: (M+H)+=479.0. The solvent was evaporated The residue was dissolved in methanol purified by RP-HPLC (pH=10)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 4-[3-(1-quinolin-6-ylcyclopropyl)[1,2,4]triazolo[4,3-b][1,2,4]triazin-6-yl]benzoic acid (10 mg, 0.02 mmol), (2S)-2-aminopropanamide (3.2 mg, 0.037 mmol), benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (13 mg, 0.029 mmol), and N,N-diisopropylethylamine (13 μL, 0.073 mmol) in methylene chloride (0.5 mL) was stirred at RT overnight. The solvent was evaporated. The residue was dissolved in methanol, and purified by RP-HPLC (pH=10) to afford the desired product. Analytical LCMS: (M+H)+=479.0. The solvent was evaporated The residue was dissolved in methanol purified by RP-HPLC (pH=10)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: An equimolar solution of AcPhe-OEt (acceptor) and Ala-NH2 (donor) was dissolved in dioxane containing 5 vol % tertiary amine and approximately 1 vol % water at 23° C. The solution was shaken at 25 oscillations/min and approximately 10 units of poly(2-N-methacrylamido-2-deoxy-D-glucose) α-chymotrypsin conjugate was added. The reaction was monitored using HPLC analysis on a C18 column using 25% acetonitrile aqueous solution with 0.1% TFA as the eluent. After 12 hours, HPLC analysis found a quantitative yield of AcPheAla-NH2. The solution was then filtered, the dioxane reduced in vacuo and the product purified by recrystallization obtaining a 97% yield of AcPheAla-NH2. Additional examples of the use of protease-polymer conjugates for the formation of peptide bonds are contained in Table 2. Note that despite the presence of organic solvent, peptide bond formation can be accomplished at elevated temperatures. The use of protease-polymer conjugates for the synthesis of peptide bonds is important, not only for the preparation of peptides and proteins, but also because the chemistry demonstrates the stability of protein-polymer conjugates in organic solvents. Under the same conditions and at the same activity levels used for the preparation of peptide bonds using protease-polymer conjugates, the native enzymes gave less than 5% of the desired product. was added

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: An equimolar solution of AcPhe-OEt (acceptor) and Ala-NH2 (donor) was dissolved in dioxane containing 5 vol % tertiary amine and approximately 1 vol % water at 23° C. The solution was shaken at 25 oscillations/min and approximately 10 units of poly(2-N-methacrylamido-2-deoxy-D-glucose) α-chymotrypsin conjugate was added. The reaction was monitored using HPLC analysis on a C18 column using 25% acetonitrile aqueous solution with 0.1% TFA as the eluent. After 12 hours, HPLC analysis found a quantitative yield of AcPheAla-NH2. The solution was then filtered, the dioxane reduced in vacuo and the product purified by recrystallization obtaining a 97% yield of AcPheAla-NH2. Additional examples of the use of protease-polymer conjugates for the formation of peptide bonds are contained in Table 2. Note that despite the presence of organic solvent, peptide bond formation can be accomplished at elevated temperatures. The use of protease-polymer conjugates for the synthesis of peptide bonds is important, not only for the preparation of peptides and proteins, but also because the chemistry demonstrates the stability of protein-polymer conjugates in organic solvents. Under the same conditions and at the same activity levels used for the preparation of peptide bonds using protease-polymer conjugates, the native enzymes gave less than 5% of the desired product. was added

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: An equimolar solution of AcPhe-OEt (acceptor) and Ala-NH2 (donor) was dissolved in dioxane containing 5 vol % tertiary amine and approximately 1 vol % water at 23° C. The solution was shaken at 25 oscillations/min and approximately 10 units of poly(2-N-methacrylamido-2-deoxy-D-glucose) α-chymotrypsin conjugate was added. The reaction was monitored using HPLC analysis on a C18 column using 25% acetonitrile aqueous solution with 0.1% TFA as the eluent. After 12 hours, HPLC analysis found a quantitative yield of AcPheAla-NH2. The solution was then filtered, the dioxane reduced in vacuo and the product purified by recrystallization obtaining a 97% yield of AcPheAla-NH2. Additional examples of the use of protease-polymer conjugates for the formation of peptide bonds are contained in Table 2. Note that despite the presence of organic solvent, peptide bond formation can be accomplished at elevated temperatures. The use of protease-polymer conjugates for the synthesis of peptide bonds is important, not only for the preparation of peptides and proteins, but also because the chemistry demonstrates the stability of protein-polymer conjugates in organic solvents. Under the same conditions and at the same activity levels used for the preparation of peptide bonds using protease-polymer conjugates, the native enzymes gave less than 5% of the desired product. was added

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: An equimolar solution of AcPhe-OEt (acceptor) and Ala-NH2 (donor) was dissolved in dioxane containing 5 vol % tertiary amine and approximately 1 vol % water at 23° C. The solution was shaken at 25 oscillations/min and approximately 10 units of poly(2-N-methacrylamido-2-deoxy-D-glucose) α-chymotrypsin conjugate was added. The reaction was monitored using HPLC analysis on a C18 column using 25% acetonitrile aqueous solution with 0.1% TFA as the eluent. After 12 hours, HPLC analysis found a quantitative yield of AcPheAla-NH2. The solution was then filtered, the dioxane reduced in vacuo and the product purified by recrystallization obtaining a 97% yield of AcPheAla-NH2. Additional examples of the use of protease-polymer conjugates for the formation of peptide bonds are contained in Table 2. Note that despite the presence of organic solvent, peptide bond formation can be accomplished at elevated temperatures. The use of protease-polymer conjugates for the synthesis of peptide bonds is important, not only for the preparation of peptides and proteins, but also because the chemistry demonstrates the stability of protein-polymer conjugates in organic solvents. Under the same conditions and at the same activity levels used for the preparation of peptide bonds using protease-polymer conjugates, the native enzymes gave less than 5% of the desired product. was added

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: An equimolar solution of AcPhe-OEt (acceptor) and Ala-NH2 (donor) was dissolved in dioxane containing 5 vol % tertiary amine and approximately 1 vol % water at 23° C. The solution was shaken at 25 oscillations/min and approximately 10 units of poly(2-N-methacrylamido-2-deoxy-D-glucose) α-chymotrypsin conjugate was added. The reaction was monitored using HPLC analysis on a C18 column using 25% acetonitrile aqueous solution with 0.1% TFA as the eluent. After 12 hours, HPLC analysis found a quantitative yield of AcPheAla-NH2. The solution was then filtered, the dioxane reduced in vacuo and the product purified by recrystallization obtaining a 97% yield of AcPheAla-NH2. Additional examples of the use of protease-polymer conjugates for the formation of peptide bonds are contained in Table 2. Note that despite the presence of organic solvent, peptide bond formation can be accomplished at elevated temperatures. The use of protease-polymer conjugates for the synthesis of peptide bonds is important, not only for the preparation of peptides and proteins, but also because the chemistry demonstrates the stability of protein-polymer conjugates in organic solvents. Under the same conditions and at the same activity levels used for the preparation of peptide bonds using protease-polymer conjugates, the native enzymes gave less than 5% of the desired product. was added

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 4-[3-(1-quinolin-6-ylcyclopropyl)[1,2,4]triazolo[4,3-b][1,2,4]triazin-6-yl]benzoic acid (10 mg, 0.02 mmol), (2S)-2-aminopropanamide (3.2 mg, 0.037 mmol), benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (13 mg, 0.029 mmol), and N,N-diisopropylethylamine (13 μL, 0.073 mmol) in methylene chloride (0.5 mL) was stirred at RT overnight. The solvent was evaporated. The residue was dissolved in methanol, and purified by RP-HPLC (pH=10) to afford the desired product. Analytical LCMS: (M+H)+=479.0. The solvent was evaporated The residue was dissolved in methanol purified by RP-HPLC (pH=10)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 4-[3-(1-quinolin-6-ylcyclopropyl)[1,2,4]triazolo[4,3-b][1,2,4]triazin-6-yl]benzoic acid (10 mg, 0.02 mmol), (2S)-2-aminopropanamide (3.2 mg, 0.037 mmol), benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (13 mg, 0.029 mmol), and N,N-diisopropylethylamine (13 μL, 0.073 mmol) in methylene chloride (0.5 mL) was stirred at RT overnight. The solvent was evaporated. The residue was dissolved in methanol, and purified by RP-HPLC (pH=10) to afford the desired product. Analytical LCMS: (M+H)+=479.0. The solvent was evaporated The residue was dissolved in methanol purified by RP-HPLC (pH=10)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 4-[3-(1-quinolin-6-ylcyclopropyl)[1,2,4]triazolo[4,3-b][1,2,4]triazin-6-yl]benzoic acid (10 mg, 0.02 mmol), (2S)-2-aminopropanamide (3.2 mg, 0.037 mmol), benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (13 mg, 0.029 mmol), and N,N-diisopropylethylamine (13 μL, 0.073 mmol) in methylene chloride (0.5 mL) was stirred at RT overnight. The solvent was evaporated. The residue was dissolved in methanol, and purified by RP-HPLC (pH=10) to afford the desired product. Analytical LCMS: (M+H)+=479.0. The solvent was evaporated The residue was dissolved in methanol purified by RP-HPLC (pH=10)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In all cases, the reaction of L-Ala-NH2 (6) with Z-L-Phe-OBn (1) was slower than Gly-NH2 (5) with Z-L-Phe-OBn (1). Further, after 24 hours, Z-L-Phe-Ala-NH2 (11) was obtained in moderate yield (33-57%) using WT, S166C—SCH2C6H5, —SCH2C6F5, and —SCH2(p-COOH—C6H4) as the catalysts. However, Z-L-Phe-Ala-NH2 (11) was obtained in 88% yield in the case of S166C—SCH2CH2NH3+. Unlike S166C—SCH2CH2NH3+, the use of M222C—SCH2CH2NH3+ did not improve the yield of the dipeptide product as compared to the WT-catalyzed reaction; only a low 22% yield of Z-L-Phe-Ala-NH2 (11) was obtained. This was possibly due to the steric interaction of this residue at the binding site, S1pocket, with the P1 substrate as mentioned above.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 100 mg (0.23 mmol) of Compound 402a, 86 mg (0.69 mmol) of L-alaninamide, 322 mg (0.69 mmol) of PyBroP, 84 mg (0.69 mmol) DMAP and 89 mg (0.69 mmol) DIEA in 5 mL anhydrous CH2Cl2 was stirred at room temperature for 24 h. To this solution was added 214 mg (0.92 mmol) of CSA. The solution was stirred for another 24 h, diluted with 10 mL CH2Cl2 and washed with 10 mL H2O. The solvent was dried and evaporated. The residue was chromatographed on silica gel using first hexane/EtOAc then CH2Cl2/MeOH as eluent yielding 50 mg yellow oil. MS: 514.28 (M+H+). washed with 10 mL H2O The solvent was dried evaporated The residue was chromatographed on silica gel using first hexane/EtOAc