作者:Akira Yada、Shiro Ebata、Hiroaki Idei、Di Zhang、Yoshiaki Nakao、Tamejiro Hiyama
DOI:10.1246/bcsj.20100068
日期:2010.10.15
Lewis acid cocatalysts such as organoaluminum and -boron compounds dramatically improve the efficiency of the nickel-catalyzed arylcyanation of alkynes. Electron-rich aryl cyanides, which exhibit poor reactivity in the absence of Lewis acids, smoothly undergo the arylcyanation reaction under the nickel/Lewis acid dual catalysis. Excellent chemoselectivity is observed for aryl cyanides having a chloro or bromo group, which allows a single-step access to a synthetic intermediate of P-3622, a squalene synthetase inhibitor. The scope of the arylcyanation is also expanded to norbornadiene. Alkenylcyanation of alkynes is achieved under the nickel/Lewis acid dual catalysis to give cyano-substituted 1,3-dienes stereoselectively.
路易斯酸共催化剂,如有机铝和有机硼化合物,显著提高了镍催化的炔烃芳腈化反应的效率。在没有路易斯酸的情况下表现出较差反应性的富电子芳腈,在镍/路易斯酸双重催化下顺利进行芳腈化反应。对于带有氯或溴基团的芳腈,观察到优异的化学选择性,从而可以一步合成P-3622的合成中间体,一种蔗糖合成酶抑制剂。芳腈化反应的适用范围也扩展到诺尔苯二烯。在镍/路易斯酸双重催化下实现了对炔烃的烯炔腈化反应,选择性地生成氰基取代的1,3-二烯。