Enantio- and diastereoselective synthesis of 4′-α-substituted carbocyclic nucleosides
作者:Keisuke Kato、Hisaki Suzuki、Hiromichi Tanaka、Tadashi Miyasaka
DOI:10.1016/s0957-4166(98)00065-2
日期:1998.3
Enantio-and diastereoselective synthesis of 4-alpha-alkylcarbovir derivatives 5 were achieved based on Sakai's asymmetric alkylation of beta-keto esters. The key carbocyclic intermediate 14 was synthesized from 8 via an eleven-step sequence. Coupling of 14 with 2-amino-6-chloropurine followed by desilylation and subsequent hydrolysis gave the target compounds 5 in moderate yields. (C) 1998 Elsevier Science Ltd. All rights reserved.