In Situ-Generated Formamidine as a Carbon/Nitrogen Source for Enaminone Formation: One-Pot Synthesis of Functionalized 4-Acyl-1,2,3-triazoles

原位生成的甲脒作为碳/氮源用于烯胺酮的形成:功能化4-酰基-1,2,3-三唑的一锅法合成

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Abstract

N,N-Dimethylformamide was reacted with hexamethyldisilazane to generate an N,N-dimethylformimidamide intermediate; thereafter, a reaction with acetophenones/β-diketones was induced to form enaminones. The one-pot synthetic protocol described in this paper can be applied to synthesize 1,4-disubstituted 1,2,3-triazoles and 1,4,5-trisubstituted 1,2,3-triazoles, in which organic azides are used as substrates under optimized conditions. Furthermore, this protocol uses readily available materials, is nearly free of solvent, can be applied to gram-scale operations, and leads to the formation of structurally diverse products with favorable yields.

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