作者:Tomohiro Igarashi、Shigeru Arai、Atsushi Nishida
DOI:10.1021/jo400342y
日期:2013.5.3
Anti carbocyanative cyclization using 1,6-enynes under nickel catalysis is described. This reaction is triggered by hydronickelation to alkenes followed by carbometalation. Steric repulsion caused by the bulky substituents on alkynes promotes isomerization of the carbon–carbon double bond geometry in an organonickel intermediate to introduce both alkyl and cyano groups in an anti fashion.
描述了在镍催化下使用1,6-烯炔的抗碳氰化环化反应。该反应由加氢镍化为烯烃然后进行碳金属化引发。炔烃上大量取代基引起的立体排斥促进了有机镍中间体中碳-碳双键几何结构的异构化,从而以反方式同时引入了烷基和氰基。