Regioselective control using a catalyst switch in the reaction of diarylmethyl chlorides with allyltributylstannane
作者:Bo Peng、Xiujuan Feng、Xin Zhang、Liyun Ji、Ming Bao
DOI:10.1016/j.tet.2010.06.019
日期:2010.8
is described. The reaction pathway (allylative dearomatization vs cross-coupling) can be easily controlled using different catalysts. When reactions are performed in the presence of Pd2(dba)3 and PPh3, allylative dearomatization proceeds to provide satisfactory yield of the desired products. However, when Cy3P·HBF4 is employed as a catalyst instead of palladium, a Stille-type cross-coupling reaction
描述了在二芳基甲基氯化物5a与烯丙基三丁基锡反应中的区域选择性控制。可以使用不同的催化剂轻松控制反应途径(烯丙基脱芳香化与交叉偶联)。当在Pd 2(dba)3和PPh 3的存在下进行反应时,进行烯丙基脱芳构作用以提供所需产物的令人满意的产率。然而,当使用Cy 3 P·HBF 4代替钯作为催化剂时,仅进行斯蒂勒型交叉偶联反应,以提供优异的相应产物收率。