Synthesis of α-aryl enaminones through reactions of β-aryl enones with benzyl azide
摘要:
Reaction of benzalacetones and dibenzalacetones with benzyl azide promoted by BF3 center dot OEt2 afforded Z and E densely substituted acyclic alpha-aryl enaminones in 21-95% yield. For benzalacetones major Z-isomers were obtained, while E-isomers were the tendency for dibenzalacetones. The synthesis involves domino 1,3-dipolar cycloaddition and 1,2-aryl migration, and is the first metal free practical alternative to the preparation of acyclic alpha-aryl enaminones from commercial available or easily prepared starting materials. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis of α-aryl enaminones through reactions of β-aryl enones with benzyl azide
作者:Silvio Cunha、Amenson Trindade Gomes
DOI:10.1016/j.tetlet.2012.09.125
日期:2012.12
Reaction of benzalacetones and dibenzalacetones with benzyl azide promoted by BF3 center dot OEt2 afforded Z and E densely substituted acyclic alpha-aryl enaminones in 21-95% yield. For benzalacetones major Z-isomers were obtained, while E-isomers were the tendency for dibenzalacetones. The synthesis involves domino 1,3-dipolar cycloaddition and 1,2-aryl migration, and is the first metal free practical alternative to the preparation of acyclic alpha-aryl enaminones from commercial available or easily prepared starting materials. (C) 2012 Elsevier Ltd. All rights reserved.