Palladium-Catalyzed [4 + 3] or [2 + 2 + 3] Annulation via C–H Activation and Subsequent Decarboxylation: Access to Heptagon-Embedded Polycyclic Aromatic Hydrocarbons
作者:Xiumei Yang、Xiahong Chen、Yankun Xu、Minghao Zhang、Guobo Deng、Yuan Yang、Yun Liang
DOI:10.1021/acs.orglett.1c00520
日期:2021.4.2
attractive challenge. Herein a novel palladium-catalyzed [4 + 3] decarboxylative annulation of 2-iodobiphenyls with 2-(2-halophenyl)acrylic acids is reported, which provides an efficient approach for assembling various tribenzo[7]annulenes via a C–H activation and decarboxylation process. Moreover, tribenzo[7]annulenes can be also synthesized via a [2 + 2 + 3] decarboxylative annulation strategy by employing
在多环芳烃骨架中构造七元环仍然是一个众所周知的难题,但仍是一个有吸引力的挑战。本文报道了一种新颖的钯催化2-碘联苯与2-(2-卤代苯基)丙烯酸的[4 + 3]脱羧环化反应,它提供了一种通过C–H活化和组装各种三苯并[7]环烯的有效方法。脱羧过程。而且,三苯并[7]环戊烯还可以通过[2 + 2 + 3]脱羧环化策略,通过使用容易获得的1,2-卤代苯,苯基硼酸和2-(2-卤代苯基)丙烯酸来合成。