Chemoenzymatic synthesis of (3S,4S)- and (3R,4R)-3-methoxy-4-methylaminopyrrolidine
作者:Ahmed Kamal、Ahmad Ali Shaik、Mahendra Sandbhor、M. Shaheer Malik、Harumi Kaga
DOI:10.1016/j.tetlet.2004.08.167
日期:2004.10
Facile chemoenzymatic enantioselective synthesis of (3S,4S)-3-methoxy-4-methylaminopyrrolidine, a key intermediate for a new quinolone antitumor compound AG-7352 has been described. This methodology illustrates the preparation of 3-azido-1-benzyloxycarbonyl-4-hydroxypyrrolidine starting from diallylamine via 1-benzyloxycarbonyl-3-pyrroline obtained by ring-closing metathesis (RCM) employing Grubbs’
已经描述了容易的化学酶对映选择性合成(3 S,4 S)-3-甲氧基-4-甲基氨基吡咯烷,这是新型喹诺酮抗肿瘤化合物AG-7352的关键中间体。该方法论证了通过使用格鲁布斯催化剂通过闭环易位(RCM)获得的1-苄氧基羰基-3-吡咯啉,从二烯丙基胺开始制备3-叠氮基-1-苄氧基羰基-4-羟基吡咯烷。使用PS-C脂肪酶进行酶促酯交换反应,得到> 99%ee的(3 S,4 S)-3-叠氮基1-苄氧基羰基-4-羟基吡咯烷酮,在羟基甲基化后进行顺序反应,得到所需的中间体,( 3 S,4 S)-1-叔-丁氧基羰基-3-叔叔丁氧基羰基氨基-4-甲氧基吡咯烷。