Sequential Double Olefination of 2-(Arylmethylidene)-2-phosphonoacetonitrile with Dimsyl Lithium and Aldehydes: A Domino Route to Densely Substituted 1,3-Butadienes
作者:Raghunath Chowdhury、Sunil K. Ghosh
DOI:10.1002/ejoc.200800385
日期:2008.8
stereoselective synthesis of densely substituted 1,3-dienes has been achieved which entails a sequential double olefination of 2-(arylmethylidene)-2-phosphonoacetonitriles by a one-pot domino process involving Michael addition of dimsyllithium to 2-(arylmethylidene)-2-phosphonoacetonitrile, Horner–Wadsworth–Emmons reaction of the resulting phosphonate ylide with the added aldehyde followed by base induced
已经实现了密集取代的 1,3-二烯的高效和高度立体选择性合成,该合成需要通过一锅多米诺法对 2-(芳基亚甲基)-2-膦酰基乙腈进行顺序双烯化,包括二甲基锂与 2-(芳基亚甲基)的迈克尔加成)-2-膦酰基乙腈,生成的膦酸盐叶立德与添加的醛的 Horner-Wadsworth-Emmons 反应,然后是碱诱导的甲基亚磺氧基消除。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)