PROCESS FOR THE PREPARATION OF 3,4-EPOXY-2-AMINO-1-SUBSTITUTED BUTANE DERIVATIVES AND INTERMEDIATE COMPOUNDS THEREOF
申请人:Singh Rakesh
公开号:US20110178305A1
公开(公告)日:2011-07-21
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 R
3
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所表示的threo-3,4-环氧-2-氨基-1-取代丁烷衍生物的过程,该过程包括将一般式III化合物或其盐与一般式IV的酸的活性酯反应,然后用碱处理其产物。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。一般式I和III的化合物,特别是它们的(2S,3R)构型,是制备阿扎那韦双硫酸盐的有用中间体。