4-Methylmorpholine → HCID 7031902, compound

Participants

Reaction Conditions

Reaction Steps

0.1 g of L-alanine methyl ester hydrochloride (0.7 mmol), 0.2 g of N-acetyl-L-phenylalanine (1 mmol) and 0.55 ml of N-methylmorpholine (5 mmol) are dissolved in 50 ml of dichloromethane and cooled to −10° C. 0.5 g of CPA from example 1 (50% in CH2Cl2; 0.8 mmol) is added slowly, and the mixture is stirred under cold conditions for 3 h and at room temperature for 72 h. The solution is concentrated by evaporation and extracted with ethyl acetate and 1 N HCl solution, sat. NaHCO3, sat. NaCl and dist. water. The organic phase is dried over magnesium sulfate, filtered off and concentrated by evaporation. 0.18 g of the white N-acetyl-L-phenylalaninyl-L-alanine methyl ester is obtained (88%).

Provenance & Evidence