A Facile Method for the Stereoselective Preparation of (1<i>Z</i>,3<i>E</i>)-Dienyl Ethers via 1,4-Elimination of 1,4-Dialkoxy-(2<i>Z</i>)-alkenes with <i>n</i>-Butyllithium
作者:Eiji Tayama、Sayaka Sugai
DOI:10.1055/s-2006-939053
日期:——
Treatment of 1-alkoxy-4-methoxy-(2Z)-alkenes or 1-siloxy-4-methoxy-(2Z)-alkenes with n-butyllithium in diethyl ether is shown to afford the corresponding (1Z,3E)-dienyl, alkyl or silyl ethers, respectively, in high stereoselectivity via a facile 1,4-elimination. The scope and the regio- and stereochemical features of the synthetic method are described.
显示在乙醚中用正丁基锂处理 1-烷氧基-4-甲氧基-(2Z)-烯烃或 1-甲硅烷氧基-4-甲氧基-(2Z)-烯烃得到相应的 (1Z,3E)-二烯基,通过简单的 1,4-消除,分别具有高立体选择性的烷基或甲硅烷基醚。描述了合成方法的范围和区域和立体化学特征。