Asymmetric synthesis of andavadoic acid via base-catalyzed 5-exo-tet cyclization of a β-hydroperoxy epoxide
作者:Bogdan Barnych、Bernard Fenet、Jean-Michel Vatèle
DOI:10.1016/j.tet.2012.10.022
日期:2013.1
The first total synthesis of andavadoic acid, a naturally occurring five-membered ring peroxide, and its absolute configuration assignment are reported. Central to this venture was the development of an effective synthesis of a key β-hydroperoxy epoxy ester from (R)-epichlorohydrin via chemoselective methylenation with Nysted reagent in the presence of Ti(Oi-Pr)2Cl2 and chemo- and regioselective Mukaiyama–Isayama
报道了天然存在的五元环过氧化物安达伏酸的第一个全合成及其绝对构型分配。该项目的核心是在(Ti)(O i -Pr)2 Cl 2以及化学和区域选择性的存在下,通过与Nysted试剂进行化学选择性亚甲基化反应,由(R)-表氯醇有效合成关键的β-氢过氧环氧酯。Mukaiyama–Isayama过氧化。该方法还具有通过氢过氧基团通过有效的碱促进的5- exo环氧开口来构造1,2-二氧戊环环系统的特征。