作者:Ilya Taydakov、Sergey Krasnoselskiy
DOI:10.1002/jhet.869
日期:2012.11
A simple and versatile general method for the preparation of N‐substituted 3‐, 4‐, or 5‐acetylpyrazoles from corresponding acids via hydrolysis and decarboxylation of substituted diethyl [(1‐alkyl‐1H‐pyrazolyl)carbonyl]malonates was developed. Title compounds were prepared in three steps without isolation of intermediates in 48–82% overall yield.
开发了一种简单通用的通用方法,可通过相应的酸通过取代的[(1-烷基-1 H-吡唑基)羰基]丙二酸二乙酯的水解和脱羧反应,从相应的酸制备N-取代的3-,4-或5-乙酰基吡唑。分三步制备标题化合物,无需分离中间体,总产率为48-82%。