A Novel and Convenient Synthesis of Cyclopent-1-enecarboxylates by an Intramolecular Horner-Wadsworth-Emmons Reaction
作者:Henryk Krawczyk、Łukasz Albrecht
DOI:10.1055/s-0028-1083242
日期:2008.12
A general and efficient method for the preparation of 2-diethoxyphosphoryl-6-oxohexanoates is presented. This approach is based on the Michael addition of [2-(1,3-dioxolan-2-yl)ethyl]magnesium bromide to various 3-substituted tert-butyl (E)-2-(diethoxyphosphoryl)alk-2-enoates as a key step. Application of the 2-diethoxyphosphoryl-6-oxohexanoates obtained in the intramolecular Horner-Wadsworth-Emmons reaction for the preparation of 5-substituted tert-butyl cyclopent-1-enecarboxylates is also reported.
本文介绍了一种制备2-二乙氧基磷酰基-6-氧代己酸酯的通用且有效的方法。该方法的关键步骤是基于[2-(1,3-二氧戊环-2-基)乙基]溴化镁与各种3-取代叔丁基(E)-2-(二乙氧基磷酰基)烯酸酯的迈克尔加成反应。此外,本文还报道了在分子内霍纳-沃兹沃思-埃蒙斯反应中获得的2-二乙氧基磷酰基-6-氧代己酸酯在制备5-取代叔丁基环戊-1-烯羧酸酯中的应用。