Improved protection and esterification of a precursor of the taxotere® and taxol side chains
作者:A. Commerçon、D. Bézard、F. Bernard、J.D. Bourzat
DOI:10.1016/s0040-4039(00)79128-3
日期:1992.9
esterified by conveniently protected baccatins 9a,b. Smooth deprotection in formic acid gave the N-deprotected intermediates of Taxotere® and taxol. This protocol did not generate any epimerization at C-2′ and constitutes a pratical method to prepare Taxotere®, taxol and analogs.
制备(4S,5R)-N-BOC-2,2-二甲基-4-苯基-5-恶唑烷羧酸8,并通过方便地保护的baccatins 9a,b有效地酯化。在甲酸中顺利地脱保护得到Taxotere®和紫杉醇的N-脱保护中间体。该方案未在C-2'处产生任何差向异构,并构成了制备Taxotere®,紫杉醇和类似物的实用方法。