The present invention relates to a process for the preparation of threo-3,4-epoxy-2- amino-1-substituted butane derivatives represented by general Formula I which comprises reacting compound of Formula III or salt thereof with an active ester of acid of Formula IV and treating the product thereof with base. The carbon atom bonded to the radical R3 in Formula I and IV is in the (R)-, (S)- or (R,S)-configuration. The compounds of Formula I and III, particularly in their (2S,3R) configuration are useful intermediates for the preparation of atazanavir bisulfate.
本发明涉及一种制备一般式I所代表的threo-3,4-环
氧-2-
氨基-1-取代
丁烷衍
生物的方法,包括将一般式III化合物或其盐与一般式IV酸的活性
酯反应,并用碱处理其产物。在公式I和IV中与基团R3键合的
碳原子处于(R)-、(S)-或(R,S)-构型。公式I和III的化合物,特别是它们的(2S,3R)构型,可用作atazanavir
硫酸盐的
中间体。