Cp2ZrCl2-catalyzed synthesis of 2-aminovinyl benzimidazoles under microwave conditions
摘要:
A microwave-assisted general method for the synthesis of 2-aminovinyl benzimidazoles has been developed. Treatment of the 1,2-phenylenediamines and N-arylated/N,N-diallcylated 3-aminoacroleins with bis(cyclopentadienyl)zirconium(IV) dichloride (Cp(2)ZECl(2)) as the catalyst under microwave irradiation for 3-5 min followed by in situ MnO2 oxidation afforded thirteen 2-aminovinyl benzimidazoles in good yields. (C) 2014 Qi Sun and Hong-Bin Sun. Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. All rights reserved.