Water → Methyl 2-bromo-N-(methoxycarbonyl)-D-phenylalaninate

Participants

Reaction Conditions

Reaction Steps

Add water (2.94 L) and sodium hydrogen carbonate (648.25 g, 7.64 mol) to methyl 2-bromo-D-phenylalaninate hydrochloride (580 g, 1.91 mol) in dichloromethane (9.86 L) at 10° C. in an appropriate vessel. After 5 minutes add methyl chloroformate (198.53 g, 2.10 mol) and stir the mixture at 20° C. After 3 hours add water (2.5 L) and separate the layers. Extract the aqueous with dichloromethane, dry the combined organic extracts over sodium sulfate and concentrate under reduced pressure to give the title compound (556 g, 1.74 mol). MS (m/z): 315.8 (M+1 (79Br)), 317.8 (M+1 (81Br)).

Provenance & Evidence