METHOD FOR PREPARING AZETIDINONE COMPOUND AND INTERMEDIATE OF AZETIDINONE COMPOUND
申请人:Zhejiang Hisun Pharmaceutical Co., Ltd.
公开号:US20170121281A1
公开(公告)日:2017-05-04
Disclosed is a new method for preparing an azetidinone compound represented by formula (I). The carboxylic ketoester represented by formula (II) serves as the raw material and is subjected to Grignard addition, stereoselective dehydration, ester group reduction, hydroxyl group protection, addition with imine after condensation with a chiral auxiliary, cyclization and deprotection to obtain the compound represented by formula (I). The present invention has advantages of easily available raw material, a few synthetic steps, simple operation, high yield, good stereoselectivity and low cost, and can be used for industrial production.
揭示了一种制备由化学式(I)表示的氮杂环丙酮化合物的新方法。由化学式(II)表示的羧基酮酯作为原料,经格氏试剂加成、立体选择性脱水、酯基还原、羟基保护、与手性辅助剂缩合后与亚胺加成、环化和脱保护等步骤,得到了由化学式(I)表示的化合物。该发明具有原料易得、合成步骤少、操作简单、产率高、立体选择性好、成本低等优点,可用于工业生产。