An efficient synthesis of cyclophellitol utilizing unusual regioselectivity of oxirane ring opening with Mes2BCH2Li
作者:Hideyo Takahashi、Takamasa Iimori、Shiro Ikegami
DOI:10.1016/s0040-4039(98)01458-0
日期:1998.9
Cyclophellitol has been synthesized from 5,6-enoglucoside efficiently. The carbacyclic skeleton was constructed through a Ferrier reaction mediated by PdCl2. The regioselectivity on the oxirane ring opening with Mes(2)BCH(2)Li at the key step is found to be controlled by the hydroxy protecting group. (C) 1998 Elsevier Science Ltd. All rights reserved.
A Divergent Route for a Total Synthesis of Cyclophellitol and Epicyclophellitol from a [2.2.2]Oxabicyclic Glycoside Prepared from D-Glucal
作者:R. E. McDevitt、B Fraser-Reid
DOI:10.1021/jo00091a004
日期:1994.6
D-Glucal has been used for syntheses of Tatsuta's penultimate intermediate for cyclophellitol and epicyclophellitol via a 6-exo-trig radical cyclization of 2-deoxy-2-iodo-6-alkynyl glycoside, the diastereomeric mixture produced thereby being separated into two sets, each of which leads to one or other target materials.