Synthesis of Mannich type products via a three-component coupling reaction

被引:162
作者
Pandey, G [1 ]
Singh, RP [1 ]
Garg, A [1 ]
Singh, VK [1 ]
机构
[1] Indian Inst Technol, Dept Chem, Kanpur 208016, Uttar Pradesh, India
关键词
D O I
10.1016/j.tetlet.2005.01.118
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The reactions of alkyl nitriles, acetyl chloride, aldehydes and beta-ketoesters or simple ketones was studied for the one-pot synthesis of beta-acetamido carbonyl compounds. It was observed that the reaction proceeds in the absence of Lewis acids. However, a Lewis acid catalyzes the reaction and several were tested. It was found that whereas Cu(OTf)(2) is suitable for the coupling of beta-ketoesters with aldehydes, Sc(OTf)(3) is the best for ketones. A possible mechanism is proposed based on the isolation and characterization of an intermediate. (C) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2137 / 2140
页数:4
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