Selective synthesis of 4,5-dihydroimidazo- and imidazo[1,5-a]quinoxalines via modified Pictet–Spengler reaction
摘要:
An efficient tandem approach for the selective synthesis of 4,5-dihydroimidazo[1,5-a]quinoxalines 6a-g and imidazo[1,5-a]quinoxalines 7a-h by the reaction of 2-imidazolyl anilines 4a-c with aryl aldehydes 5a-k under mild reaction conditions is described. Introduction of electron releasing alkyl groups in substrates 4a-b was found to be instrumental for the success of the reaction. (C) 2013 Elsevier Ltd. All rights reserved.
Selective synthesis of 4,5-dihydroimidazo- and imidazo[1,5-a]quinoxalines via modified Pictet–Spengler reaction
作者:Akhilesh Kumar Verma、Rajeev Ranjan Jha、V. Kasi Sankar、Raj Pal Singh
DOI:10.1016/j.tetlet.2013.08.052
日期:2013.11
An efficient tandem approach for the selective synthesis of 4,5-dihydroimidazo[1,5-a]quinoxalines 6a-g and imidazo[1,5-a]quinoxalines 7a-h by the reaction of 2-imidazolyl anilines 4a-c with aryl aldehydes 5a-k under mild reaction conditions is described. Introduction of electron releasing alkyl groups in substrates 4a-b was found to be instrumental for the success of the reaction. (C) 2013 Elsevier Ltd. All rights reserved.