A Versatile Route to 2-Substituted Cyclic 1,3-Dienes via a Copper(I)-Catalyzed Cross-Coupling Reaction of Dienyl Triflates with Grignard Reagents
作者:A. Sofia E. Karlström、Magnus Rönn、Atli Thorarensen、Jan-E. Bäckvall
DOI:10.1021/jo971737i
日期:1998.4.1
A general synthesis of 2-substituted cyclic 1,3-dienes in two steps from alpha,beta-unsaturated ketones has been developed. Formation of a dien-2-yl triflate followed by a copper(I)-catalyzed cross-coupling reaction with a Grignard reagent gives 2-substituted dienes in fair to excellent yields. Alkyl, aryl, and allyl Grignard reagents can be used.
已经开发了由α,β-不饱和酮分两步合成2-取代的环状1,3-二烯的一般方法。形成三氟甲磺酸二烯-2-基酯,然后与格氏试剂进行铜(I)催化的交叉偶联反应,可以公平地获得优异产率的2-取代二烯。可以使用烷基,芳基和烯丙基格氏试剂。