Potassium‐Zincate‐Catalyzed Benzylic C−H Bond Addition of Diarylmethanes to Styrenes
作者:Yu‐Feng Liu、Dan‐Dan Zhai、Xiang‐Yu Zhang、Bing‐Tao Guan
DOI:10.1002/anie.201713165
日期:2018.7.2
for the synthesis of diarylmethine‐containing compounds. However, the methods developed to date for this purpose require a stoichiometric amount (usually more) of either a strong base or an oxidant. Reported here is the first catalytic benzylic C−H bond addition of diarylmethanes to styrenes and conjugated dienes. A potassium zincate complex, generated from potassium benzyl and zinc amide, acts as
二芳基甲烷的苄基CH键的直接官能化是合成含二芳基次甲基化合物的重要策略。但是,迄今为止为此目的开发的方法需要化学计量的量(通常更多)的强碱或氧化剂。此处报道的是二芳基甲烷向苯乙烯和共轭二烯的第一个催化苄基CH键加成。由苄基钾和酰胺化锌生成的锌酸钾络合物充当催化剂,并显示出良好的活性和化学选择性。考虑到反应的原子经济性和催化剂的现成性,该反应构成了合成二芳基烷烃的实用,有效的方法。