Rh(I)-Catalyzed Olefin Hydroarylation with Electron-Deficient Perfluoroarenes
摘要:
Assisted by a partially aqueous media, a catalyst system of [Rh(cod)(OH)](2) and DPPBenzene ligand effectively promotes direct conjugate additions by perfluoroarenes. This formal C-H alkylation process represents a rare example of olefin hydroarylation with electron-deficient arenes. The catalyst system can be modified to selectively form the corresponding olefination products under anhydrous conditions.
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.