L-Phenylalanine → Benzyl N,N-dibenzyl-L-phenylalaninate

Participants

Reaction Conditions

Reaction Steps

Twenty-five grams (151.3 mmol) of (L)-phenylalanine and 66.67 g (482.4 mmol) of potassium carbonate were dissolved in 100 ml of water, and 57.51 g (454.3 mmol) of benzyl chloride were added thereto. The mixture was heat-stirred at 95° C. for 19 hours. After the reaction mixture was cooled to room temperature, 67 ml of n-heptane and 50 ml of water were added thereto. The organic layer was washed twice with 50 ml of a mixture of methanol and water at a volume ratio of 1:2 and was then dried over anhydrous sodium sulfate. The dried substance was filtered and concentrated to give 61.64 g (90%, 121.8 mmol) of the above-mentioned compound (Ia) in a yield of 84.7%.

Provenance & Evidence