Microwave-Accelerated <i>O</i>-Alkylation of Carboxylic Acids with <i>O</i>-Alkylisoureas
作者:Stefano Crosignani、Peter D. White、Bruno Linclau
DOI:10.1021/ol0263705
日期:2002.8.1
Microwave-assisted beta-alkylations of several carboxylic acids have been performed with three different beta-alkylisoureas. All reactions are significantly faster compared to conventionally heated reactions, while retaining high chemoselectivity. The combination of microwave technology with the use of the solid-supported isourea 3 enables the synthetic chemist to obtain the pure methyl esters starting from the corresponding acids in less than an hour.