Fujiwara-Moritani 反应是通过 Pd 催化的 C-H 活化进行芳烃烯化的有力工具。然而,由于需要超化学计量的有毒化学氧化剂,因此从环境和原子经济角度来看,该反应没有吸引力。在此,我们报告了通过电氧化藤原-森谷反应实现简单芳烃的第一个非定向和区域选择性烯化。这种操作友好的方法的多功能性通过广泛的底物范围得到了证明,其中包括芳烃、杂芳烃和各种烯烃。电分析研究表明 Pd( II )/Pd( IV ) 催化循环通过Pd( III ) 中间体参与。
Rhodium-Mediated Decarboxylative Conjugate Addition of Fluorinated Benzoic Acids: Stoichiometric and Catalytic Transformations
作者:Zhong-Ming Sun、Pinjing Zhao
DOI:10.1002/anie.200901097
日期:2009.8.24
Depending on the bisphosphine ligand, the decarboxylation of 2,6‐difluorinated benzoic acids with a RhI catalyst in the presence of an acrylic ester or acrylamide led preferentially to conjugate addition (product 1) or Heck–Mizoroki arylation (product 2; binap=2,2′‐bis(diphenylphosphanyl)‐1,1′‐binaphthyl, diop=4,5‐bis(diphenylphosphanylmethyl)‐2,2‐dimethyl‐1,3‐dioxolane).
Rh(I)-Catalyzed Decarboxylative Transformations of Arenecarboxylic Acids: Ligand- and Reagent-Controlled Selectivity toward Hydrodecarboxylation or Heck−Mizoroki Products
作者:Zhong-Ming Sun、Jing Zhang、Pinjing Zhao
DOI:10.1021/ol100001b
日期:2010.3.5
A Rh(I)-based catalyst system has been developed to promote three types of decarboxylative transformations of arenecarboxylic acids: (1) hydrodecarboxylation, (2) Heck-Mizoroki olefination, and (3) conjugate addition. Scopes of reactions (1) and (2) were studied, and the ligand and reagent dependence of selectivity was explored.