作者:Junfeng Yang、Yuto Mori、Masahiro Yamanaka、Naohiko Yoshikai
DOI:10.1002/chem.202001223
日期:2020.7.2
cobalt‐diphosphine catalyst has been found to efficiently promote intramolecular cyclization of ortho‐cyclopropylvinyl‐ and cyclopropylidenemethyl‐substituted benzaldehydes into benzocyclooctadienone and benzocycloheptadienone derivatives, respectively. This ring‐opening hydroacylation likely involves aldehyde C−H oxidative addition, olefin insertion, cyclopropane cleavage by β‐carbon elimination, and
已发现一种简单的钴二膦催化剂可有效地促进邻环丙基丙基乙烯基和环丙基亚甲基甲基取代的苯甲醛分别在分子内环化成苯并环辛二烯酮和苯并环庚二烯酮衍生物。在机械实验和DFT计算的支持下,这种开环加氢酰化反应可能涉及醛CH的氧化加成,烯烃的插入,通过β碳的消除引起的环丙烷裂解以及CC键形成的还原性消除。