Herein we present a continuous improvement of visible-lightmediated N-dealkylative addition of tertiary amines to dimethyl acetylenedicarboxylates (DMAD) using alkyl halogenides as external oxidants together with base additives. This method is highlighted by excellent tolerance with various tertiary amines and good to excellent yields in short reaction time under mild conditions.
An efficient dealkylative addition of trialkylamines to dialkyl acetylenedicarboxylates in the presence of a metallic chloride
作者:Chan Sik Cho
DOI:10.1016/j.tetlet.2005.01.034
日期:2005.2
Dialkyl acetylenedicarboxylates react effectively with an array of trialkylamines in dioxane at 80degreesC in the presence of a metallic chloride to afford the corresponding aminomaleates in good yields. (C) 2005 Elsevier Ltd. All rights reserved.