(2R)-2-amino-3-tritylsulfanylpropanamide

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

Procedure: Part C: To a solution of 2.93 grams (8.1 mmol) of S-trityl-L-cysteine amide in 50 mL of dry methylene chloride was added 2 equivalents of triethylamine followed by 2.29 grams (8.1 mmol) of 4-(4′-methoxyphenyl)phenylsulfonyl chloride. The solution was stirred at room temperature for one hour, then concentrated on a rotory evaporator. The resulting slurry was partitioned between ethyl acetate and water. The organics were washed with 5% potassium hydrogen sulfate, saturated sodium bicarbonate, and brine, dried over sodium sulfate, filtered and concentrated to give 4.2 grams of crude product. The crude material was purified by silica gel chromatography using 1:1 ethyl acetate:hexane as the eluent to yield 3.36 grams of pure N-(4-(4′methoxyphenyl)-benzenesulfonyl-S-trityl-L-cysteine amide as a white solid. concentrated on a rotory evaporator The resulting slurry was partitioned between ethyl acetate and water The organics were washed with 5% potassium hydrogen sulfate, saturated sodium bicarbonate, and brine dried over sodium sulfate filtered concentrated to give 4.2 grams of crude product The crude material was purified by silica gel chromatography

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

Procedure: To a solution of 3-methyl-N-(2,2-diphenylacetyl-L-phenylalanine (see example 302, 1.0 g, 2.68 mmol), 1-hydroxybenzotriazole hydrate (0.41 g, 2.68 mmol) and N-methylmorpholine (0.74 mL, 6.69 mmol) in CH2Cl2 (80 mL) is added 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide.HCl (0.77 g, 4.02 mmol) in one portion. After stirring 30 minutes at room temperature, S-trityl-L-cysteinamide (0.97 g, 2.68 mmol) is added to the solution in one portion, and the solution is stirred for 16 hours. The solution is evaporated, and the residue partitioned between water (80 mL) and ethyl acetate (80 mL). The aqueous layer is washed with EtOAc (2×80 mL), and the combined organic layers are then washed with 1 N HCl (100 mL), saturated aqueous NaHCO3 (1×50 mL), water (1×50 mL) and brine (1×50 mL), dried over MgSO4, and evaporated. The residue is triturated with Et2O/hexane (1:1) to yield N-[3-methyl-N-(2,2-diphenylacetyl)-L-phenylalanyl]-S-trityl-L-cysteinamide as a white solid. the solution is stirred for 16 hours The solution is evaporated the residue partitioned between water (80 mL) and ethyl acetate (80 mL) The aqueous layer is washed with EtOAc (2×80 mL) the combined organic layers are then washed with 1 N HCl (100 mL), saturated aqueous NaHCO3 (1×50 mL), water (1×50 mL) and brine (1×50 mL) dried over MgSO4 evaporated The residue is triturated with Et2O/hexane (1:1)

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

Procedure: To a solution of 3-methyl-N-(2,2-diphenylacetyl-L-phenylalanine (see example 302, 1.0 g, 2.68 mmol), 1-hydroxybenzotriazole hydrate (0.41 g, 2.68 mmol) and N-methylmorpholine (0.74 mL, 6.69 mmol) in CH2Cl2 (80 mL) is added 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide.HCl (0.77 g, 4.02 mmol) in one portion. After stirring 30 minutes at room temperature, S-trityl-L-cysteinamide (0.97 g, 2.68 mmol) is added to the solution in one portion, and the solution is stirred for 16 hours. The solution is evaporated, and the residue partitioned between water (80 mL) and ethyl acetate (80 mL). The aqueous layer is washed with EtOAc (2×80 mL), and the combined organic layers are then washed with 1 N HCl (100 mL), saturated aqueous NaHCO3 (1×50 mL), water (1×50 mL) and brine (1×50 mL), dried over MgSO4, and evaporated. The residue is triturated with Et2O/hexane (1:1) to yield N-[3-methyl-N-(2,2-diphenylacetyl)-L-phenylalanyl]-S-trityl-L-cysteinamide as a white solid. the solution is stirred for 16 hours The solution is evaporated the residue partitioned between water (80 mL) and ethyl acetate (80 mL) The aqueous layer is washed with EtOAc (2×80 mL) the combined organic layers are then washed with 1 N HCl (100 mL), saturated aqueous NaHCO3 (1×50 mL), water (1×50 mL) and brine (1×50 mL) dried over MgSO4 evaporated The residue is triturated with Et2O/hexane (1:1)

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

Procedure: 1.23 g (2.23 mmol) of the compound from example 24A was dissolved in 25 ml dichloromethane. 0.81 g (2.23 mmol) S-Trityl-L-cysteinamide, 0.39 ml (2.23 mmol) N,N-diisopropylethylamine and 0.85 g (2.23 mmol) HATU were added. The reaction mixture was stirred at room temperature for 3 h. From the reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.). The raw product was dissolved in dichloromethane and chromatographed over approx. 70 ml silica gel. Solvents used were dicloromethane/methanol 20/1 to dichloromethane/methanol 5/1. The product-containing fractions were combined and concentrated to dryness under reduced pressure. This gave 2.38 g (2.03 mmol, 91% of theory, 76% purity) of the desired product. From the reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.) The raw product was dissolved in dichloromethane chromatographed over approx. 70 ml silica gel concentrated to dryness under reduced pressure

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3.00 g (5.30 mmol) of the compound from example 13A was dissolved in 120 ml dichloromethane. 1.92 g (5.30 mmol) S-Trityl-L-cysteinamide, 0.92 ml (5.30 mmol) N,N-diisopropylethylamine and 2.02 g (5.30 mmol) HATU were added. The reaction mixture was split into 6 portions. The portions were heated for 30 min in a sealed tube at 60° C. in a microwave synthesizer. From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.). The raw product was dissolved in dichloromethane and chromatographed over approx. 800 ml silica gel. Solvents used were dichloromethane/ethyl acetate 2/1, dichloromethane/ethyl acetate 1/1. The product-containing fractions were combined and concentrated to dryness under reduced pressure. This gave 4.91 g (3.73 mmol, 70% of theory, 69% purity) of the desired product. The reaction mixture was split into 6 portions From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.) The raw product was dissolved in dichloromethane chromatographed over approx. 800 ml silica gel concentrated to dryness under reduced pressure

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3.00 g (5.30 mmol) of the compound from example 13A was dissolved in 120 ml dichloromethane. 1.92 g (5.30 mmol) S-Trityl-L-cysteinamide, 0.92 ml (5.30 mmol) N,N-diisopropylethylamine and 2.02 g (5.30 mmol) HATU were added. The reaction mixture was split into 6 portions. The portions were heated for 30 min in a sealed tube at 60° C. in a microwave synthesizer. From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.). The raw product was dissolved in dichloromethane and chromatographed over approx. 800 ml silica gel. Solvents used were dichloromethane/ethyl acetate 2/1, dichloromethane/ethyl acetate 1/1. The product-containing fractions were combined and concentrated to dryness under reduced pressure. This gave 4.91 g (3.73 mmol, 70% of theory, 69% purity) of the desired product. The reaction mixture was split into 6 portions From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.) The raw product was dissolved in dichloromethane chromatographed over approx. 800 ml silica gel concentrated to dryness under reduced pressure

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1.50 g (2.59 mmol) of the compound from example 11A was dissolved in 60 ml dichloromethane. 0.940 g (2.59 mmol) S-Trityl-L-cysteinamide, 0.45 ml (2.60 mmol) N,N-diisopropylethylamine and 0.984 g (2.59 mmol) HATU were added. The reaction mixture was split into 3 portions. The portions were heated for 30 min in a sealed tube at 60° C. in a microwave synthesizer. From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.). The raw product was dissolved in dichloromethane and chromatographed over approx. 400 ml silica gel. Solvents used were dichloromethane/ethyl acetate 2/1, dichloromethane/ethyl acetate 1/1. The product-containing fractions were combined and concentrated to dryness under reduced pressure. This gave 1.72 g (1.64 mmol, 63% of theory, 88% purity) of the desired product. The reaction mixture was split into 3 portions From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.) The raw product was dissolved in dichloromethane chromatographed over approx. 400 ml silica gel concentrated to dryness under reduced pressure

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1.50 g (2.59 mmol) of the compound from example 11A was dissolved in 60 ml dichloromethane. 0.940 g (2.59 mmol) S-Trityl-L-cysteinamide, 0.45 ml (2.60 mmol) N,N-diisopropylethylamine and 0.984 g (2.59 mmol) HATU were added. The reaction mixture was split into 3 portions. The portions were heated for 30 min in a sealed tube at 60° C. in a microwave synthesizer. From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.). The raw product was dissolved in dichloromethane and chromatographed over approx. 400 ml silica gel. Solvents used were dichloromethane/ethyl acetate 2/1, dichloromethane/ethyl acetate 1/1. The product-containing fractions were combined and concentrated to dryness under reduced pressure. This gave 1.72 g (1.64 mmol, 63% of theory, 88% purity) of the desired product. The reaction mixture was split into 3 portions From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.) The raw product was dissolved in dichloromethane chromatographed over approx. 400 ml silica gel concentrated to dryness under reduced pressure

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1.20 g (2.07 mmol) of the compound from example 9A was dissolved in 48 ml dichloromethane. 0.750 g (2.07 mmol) S-Trityl-L-cysteinamide, 0.36 ml (2.07 mmol) N,N-diisopropylethylamine and 0.787 g (2.07 mmol) HATU were added. The reaction mixture was split into 3 portions. The portions were heated for 30 min in a sealed tube at 60° C. in a microwave synthesizer. From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.). The raw product was dissolved in dichloromethane and chromatographed over approx. 400 ml silica gel. Solvents used were dichloromethane/ethyl acetate 2/1, dichloromethane/ethyl acetate 1/1. The product-containing fractions were combined and concentrated to dryness under reduced pressure. This gave 1.30 g (1.5 mmol, 56% of theory, 82% purity) of the desired product. The reaction mixture was split into 3 portions From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.) The raw product was dissolved in dichloromethane chromatographed over approx. 400 ml silica gel concentrated to dryness under reduced pressure

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1.20 g (2.07 mmol) of the compound from example 9A was dissolved in 48 ml dichloromethane. 0.750 g (2.07 mmol) S-Trityl-L-cysteinamide, 0.36 ml (2.07 mmol) N,N-diisopropylethylamine and 0.787 g (2.07 mmol) HATU were added. The reaction mixture was split into 3 portions. The portions were heated for 30 min in a sealed tube at 60° C. in a microwave synthesizer. From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.). The raw product was dissolved in dichloromethane and chromatographed over approx. 400 ml silica gel. Solvents used were dichloromethane/ethyl acetate 2/1, dichloromethane/ethyl acetate 1/1. The product-containing fractions were combined and concentrated to dryness under reduced pressure. This gave 1.30 g (1.5 mmol, 56% of theory, 82% purity) of the desired product. The reaction mixture was split into 3 portions From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.) The raw product was dissolved in dichloromethane chromatographed over approx. 400 ml silica gel concentrated to dryness under reduced pressure

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2.24 g (3.86 mmol) of the compound from example 7A was dissolved in 100 ml dichloromethane. 1.401 g (3.86 mmol) S-Trityl-L-cysteinamide, 0.67 ml (3.86 mmol) N,N-diisopropylethylamine and 1.47 g (3.86 mmol) HATU were added. The reaction mixture was split into 5 portions. The portions were heated for 30 min in a sealed tube at 60° C. in a microwave synthesizer. From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.). The raw product was purified by preparative RP-HPLC on a C18 column with a water methanol gradient from 9/1 to 1/9. The product-containing fractions were combined and concentrated to dryness under reduced pressure. This gave 3.26 g (2.75 mmol, 71% of theory, 78% purity) of the desired product as a mixture of diastereomers. The reaction mixture was split into 5 portions From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.) The raw product was purified by preparative RP-HPLC on a C18 column with a water methanol gradient from 9/1 to 1/9 concentrated to dryness under reduced pressure This gave 3.26 g (2.75 mmol, 71% of theory, 78% purity) of the desired product as a mixture of diastereomers

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2.24 g (3.86 mmol) of the compound from example 7A was dissolved in 100 ml dichloromethane. 1.401 g (3.86 mmol) S-Trityl-L-cysteinamide, 0.67 ml (3.86 mmol) N,N-diisopropylethylamine and 1.47 g (3.86 mmol) HATU were added. The reaction mixture was split into 5 portions. The portions were heated for 30 min in a sealed tube at 60° C. in a microwave synthesizer. From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.). The raw product was purified by preparative RP-HPLC on a C18 column with a water methanol gradient from 9/1 to 1/9. The product-containing fractions were combined and concentrated to dryness under reduced pressure. This gave 3.26 g (2.75 mmol, 71% of theory, 78% purity) of the desired product as a mixture of diastereomers. The reaction mixture was split into 5 portions From the combined reaction mixture the solvent was removed by rotary evaporation (approx. 40° C., approx. 200 mbar, approx. 30 min.) The raw product was purified by preparative RP-HPLC on a C18 column with a water methanol gradient from 9/1 to 1/9 concentrated to dryness under reduced pressure This gave 3.26 g (2.75 mmol, 71% of theory, 78% purity) of the desired product as a mixture of diastereomers