Synthesis of (±)-3-Methoxyestra-1,3,5(10)-trienes by the Repetitive Use of Negishi Reagent
作者:Pavel Herrmann、Martin Kotora、Miloš Buděšínský、David Šaman、Ivana Císařová
DOI:10.1021/ol053119r
日期:2006.3.1
repetitive use of Cp(2)ZrBu(2) (Negishi reagent) was applied in the synthesis of three 3-methoxyestra-1,3,5(10)-trienone isomers within four steps from the advanced intermediate 11. The overall synthesis is based on three zirconium-mediated reactions: (a) oxidative addition of a benzyl ether, (b) cyclization of an allyl-ene compound, and (c) cyclocarbonylation of a diene. The presented synthesis demonstrates
[反应:请参见文本]在先进技术的四个步骤内,重复使用Cp(2)ZrBu(2)(Negishi试剂)来合成三个3-甲氧基-1,3,5(10)-三烯酮异构体中间体11。整个合成基于三个锆介导的反应:(a)苄基醚的氧化加成;(b)烯丙烯化合物的环化;以及(c)二烯的环羰基化。提出的合成证明,可以通过重复使用一种试剂来制备复杂的有机化合物。