Direct Electrophilic Acylation of N-Substituted Pyrazoles by Anhydrides of Carboxylic Acids
作者:Ilya Taydakov、Sergey Krasnoselskiy
DOI:10.1055/s-0033-1338923
日期:——
the method are discussed. A simple, convenient and scalable approach to 1-substituted 4-acylpyrazoles through direct acylation of pyrazoles by anhydrides of aliphatic, aromatic and fluorinated carboxylic acids in the presence of concentrated sulfuric acid as a catalyst is described. Target ketones were obtained in 41–86% isolated yields in high purity without laborious purification. The scope and limitations