Synthesis of unsaturated esters from aldehydes: An inexpensive, practical alternative to the Horner-Emmons reaction under neutral conditions
作者:Brian E. Ledford、Erick M. Carreira
DOI:10.1016/s0040-4039(97)10182-4
日期:1997.11
A practical, efficient, and mild process is described for the synthesis of unsaturated esters from aldehydes in good yields and diastereoselectivities. All of the reagents used in the protocol are commercially available at a nominal price: N2CHCO2Et, catalytic (1 mol%) ReOCl3(PPh3)2, and (EtO)3P. Additionally, the reaction process can be carried out successfully in good yields (85%) and diastereoselectivities
描述了一种实用,有效且温和的方法,用于以良好的收率和非对映选择性从醛合成不饱和酯。所有在协议中使用的试剂是市售的以名义价格:N 2 CHCO 2的Et,催化(1摩尔%)ReOCl 3(PPH 3)2,和(ETO)3此外P.,反应过程可以是使用试剂级溶剂成功进行,收率很高(85%),非对映选择性(> 20:1),无需事先纯化试剂。