作者:Tetsuaki Fujihara、Yuko Katafuchi、Tomohiro Iwai、Jun Terao、Yasushi Tsuji
DOI:10.1021/ja910038p
日期:2010.2.17
system for an intermolecular addition of formamides to alkynes has been developed. The reaction of formamides with internal alkynes in the presence of a palladium catalyst with acid chloride as an additive afforded (E)-alpha,beta-unsaturated amides regio- and stereoselectively. The same catalyst system realized the first example of the addition of formamides to terminal alkynes giving the corresponding
已经开发了一种用于将甲酰胺分子间加成到炔烃的新型钯系统。甲酰胺与内部炔烃在钯催化剂存在下以酰基氯作为添加剂反应,可区域选择性和立体选择性地提供 (E)-α,β-不饱和酰胺。相同的催化剂体系实现了甲酰胺加成到末端炔烃的第一个例子,得到相应的带有末端亚甲基部分的α,β-不饱和酰胺作为主要产物。本反应广泛适用于具有各种功能的底物。该方法也适用于N,N-二取代甲酰胺与降冰片烯的反应。在反应条件下,氢化钯物种将作为关键中间体与原位生成的 HCl 形成。