反应详情

Tert-butyl 4-[[(2S)-oxiran-2-yl]methyl]piperazine-1-carboxylate 20a (9.20 g, 38 mmol) was dissolved in 60 mL of ethanol followed by the addition of 50 mL of aqueous ammonia. The reaction solution was stirred for 12 hours. The reaction solution was concentrated under reduced pressure to obtain the crude title compound tert-butyl 4-[(2R)-3-amino-2-hydroxy-propyl]piperazine-1-carboxylate 20b (9 g, as a white solid), which was used in the next step without further furification.

1. concentrationThe reaction solution was concentrated under reduced pressure