Recyclable gallium(III) triflate-catalyzed [4+3] cycloaddition for synthesis of 2,4-disubstituted-3H-benzo[b][1,4]diazepines
作者:Shi-Gang Huang、Hai-Feng Mao、Shao-Fang Zhou、Jian-Ping Zou、Wei Zhang
DOI:10.1016/j.tetlet.2013.08.092
日期:2013.11
Simple and efficient Ga(OTf)(3)-catalyzed [4+3] cycloaddition of 1,3-diarylpropynones and o-phenylenediamines is developed for the preparation of 2,4-disubstituted-3H-benzo[b][1,4]diazepines. The reaction has advantages of using a green solvent, generating a minimal amount of waste, and easy catalyst recycle. (C) 2013 Elsevier Ltd. All rights reserved.