Phosphine-catalyzed regioselective heteroaromatization between activated alkynes and isocyanides leading to pyrroles
作者:Shin Kamijo、Chikashi Kanazawa、Yoshinori Yamamoto
DOI:10.1016/j.tetlet.2005.02.104
日期:2005.4
The organophosphine catalyzed reaction of activated alkynes with isocyanides produces the corresponding heteroaromatization products, pyrroles, regioselectively in good yields. The reaction proceeds most probably through the 1,4-addition of the nucleophilic phosphine catalyst to the alkynes, followed by a [3+2] cycloaddition between the resulting alkenyl phosphine intermediates and a carbanion derived from the isocyanides. (c) 2005 Elsevier Ltd. All rights reserved.