Synthesis of 2-Arylbenzothiazole Derivatives Based on Activated Carbon/Oxygen Oxidation Followed by Suzuki-Miyaura Coupling
摘要:
A variety of 2-arylbenzothiazole derivatives were synthesized by the reaction of 2-aminobenzenethiol with substituted benzaldehydes in the presence of activated carbon and molecular oxygen system followed by Suzuki-Miyaura coupling using 2-phenylimidazole-PdCl2 complex.
Facile access to libraries of diversely substituted 2-aryl-benzoxazoles/benzothiazoles from readily accessible aldimines via cyclization/cross coupling in imidazolium-ILs with Pd(OAc)2 or NiCl2 (dppp) as catalyst
作者:Shruti S. Malunavar、Suraj M. Sutar、Hemantkumar M. Savanur、Rajesh G. Kalkhambkar、Kenneth K. Laali
DOI:10.1016/j.tetlet.2019.151509
日期:2020.2
p-bromophenyl-aldimines to 2-bromophenyl-benzoxazole/benzothiazole in [BMIM][PF6] or [BMIM][BF4] as solvent, followed by the Suzuki, Heck, and Sonogashira cross-couplingreactions catalyzed by Pd or Ni is described that generates libraries of diversely substituted 2-aryl-/heteroaryl-benzoxazoles/benzothiazoles in respectable isolated yields under mild reaction conditions. The feasibility to perform the two-steps in