Allylcyanation of Alkynes: Regio- and Stereoselective Access to Functionalized Di- or Trisubstituted Acrylonitriles
作者:Yoshiaki Nakao、Tomoya Yukawa、Yasuhiro Hirata、Shinichi Oda、Jun Satoh、Tamejiro Hiyama
DOI:10.1021/ja060519g
日期:2006.6.1
Allyl cyanides are found to add across alkynes in the presence of a nickel catalyst prepared from Ni(cod)2 and P(4-CF3-C6H4)3 in situ to give variously functionalized di- or trisubstituted acrylonitriles in highly stereoselective manners possibly via a pi-allylnickel species as an intermediate. alpha-Siloxyallyl cyanides also react at the gamma-position of a cyano group with both internal and terminal
发现在由 Ni(cod)2 和 P(4-CF3-C6H4)3 原位制备的镍催化剂存在下,烯丙基氰化物在炔烃上加成,以高度立体选择性的方式得到各种官能化的二或三取代丙烯腈,可能通过pi-烯丙基镍物种作为中间体。α-甲硅烷氧基烯丙基氰化物还在氰基的γ-位与具有各种官能团的内部和末端炔反应生成甲硅烷基烯醇醚,其在水解时生成相应的醛或酮。