New synthesis of 2',3'-dideoxy-3'-C-cyano-2'-substituted thymidines by michael addition reactions
作者:J.-C. Wu、J. Chattopadhyaya
DOI:10.1016/0040-4020(89)80117-6
日期:1989.1
A new high-yielding preparation of appropriately protected 3'-enenitrile of thymidine 5 has been devised directly from the 3'-keto thymidine 2. The 3'-enenitrile 5 has been subsequently subjected to various Michael addition reactions with ammonia, primary amines (methylamine and benzylamine), secondary amines (pyrrolidine, piperidine and morpholine) and carbon-nucleophiles (sodium dimethylmalonate
直接从3'-酮胸苷2设计了一种新的高产的,经过适当保护的5'胸腺嘧啶5的腈。随后使3'-乙腈5与氨,伯胺(甲胺和苄胺),仲胺(吡咯烷,哌啶和吗啉)和碳亲核试剂(二甲基丙二酸钠和硝基甲烷的共轭碱)进行各种迈克尔加成反应合成新的2',3'-二脱氧-3'-C-氰基-2'-取代的胸苷衍生物,该衍生物不能用任何已知方法制备。这些亲核加成反应大多数使反式异构体成为唯一产物,例如7d–7g或作为主要产物7a–7c&h与顺式异构体8a-8c&h一起,除了5与氨的反应(其中以顺式异构体9e为主要产物)外。迈克尔加合物最终经过5'脱保护,以高收率得到核苷9a–9h,10a–10c和h。本文所述的具有游离5'-羟基功能的化合物是HIV逆转录酶促进的c-DNA合成的潜在抑制剂