Palladium-Catalyzed Synthesis of Triphenylenes via Sequential C–H Activation and Decarboxylation
作者:Yuzhong Yang、Bang Zhou、Xiaoming Zhu、Guobo Deng、Yun Liang、Yuan Yang
DOI:10.1021/acs.orglett.8b02310
日期:2018.9.7
A novel tandem intermolecular decarboxylative coupling reaction of o-bromobenzoic acids and aryl iodides has been developed. The method affords a range of unsymmetrically triphenylenes and displays unique regioselectivity and broad substrate scope. Mechanistically, palladium/norbornene-catalyzed C–H activation and subsequent double decarboxylative coupling reactions were involved. Moreover, the triphenylenes
已开发出一种新颖的邻溴代苯甲酸与芳基碘化物的串联分子间脱羧偶联反应。该方法提供了一系列不对称的亚苯并显示出独特的区域选择性和广泛的底物范围。从机理上讲,涉及钯/降冰片烯催化的CH活化和随后的双脱羧偶联反应。此外,三苯撑也可以在无降冰片烯条件下由2-碘代联苯和邻溴苯甲酸合成。