Double-coupling of dibromo arenes with aryltriolborates for synthesis of diaryl-substituted planar frameworks
摘要:
A new method for simple and practical synthesis of diaryl-substituted arenes using potassium aryltriolborates was developed. Double-cross-coupling of dibromo arenes with aryltriolborates was carried out in the presence of a palladium catalyst, such as Pd(OAc)(2), Pd(PPh3)(4) or Pd(OAc)(2)/BIPHEP. The use of CuCl (40 mol %) with a palladium catalyst was found to be highly effective to give diaryl-substituted aromatic compounds in good yields. (C) 2011 Elsevier Ltd. All rights reserved.
Photo-oxidative Cross-Dehydrogenative Coupling-Type Reaction of Thiophenes with α-Position of Carbonyls Using a Catalytic Amount of Molecular Iodine
作者:Yusuke Sudo、Eiji Yamaguchi、Akichika Itoh
DOI:10.1021/acs.orglett.7b00428
日期:2017.4.7
A metal-free photo-oxidative intermolecular C–H/C–H coupling reaction of thiophenes is demonstrated with carbonylsusing a catalytic amount of molecular iodine. In this system, molecular oxygen in the air acted as a terminal oxidant to regenerate molecular iodine. A mechanistic study was also performed.