Efficient synthesis of 2-(pyrazol-3-yl)benzimidazoles from 3-arylacylidene-3,4-dihydroquinoxalin-2(1H)-ones and hydrazine hydrate via a novel rearrangement
作者:Vakhid A. Mamedov、Anna M. Murtazina、Aidar T. Gubaidullin、Elena A. Hafizova、Il’dar Kh. Rizvanov
DOI:10.1016/j.tetlet.2009.05.116
日期:2009.9
A highly efficient method for the synthesis of 2-(pyrazol-3-yl)benzimidazoles has been developed on the basis of the novel ring contraction of 3-arylacylidene-3,4-dihydroquinoxalin-2(1H)-ones with hydrazine hydrate.