One-Step Continuous Flow Synthesis of Highly Substituted Pyrrole-3-carboxylic Acid Derivatives via in Situ Hydrolysis of <i>tert-</i>Butyl Esters
作者:Ananda Herath、Nicholas D. P. Cosford
DOI:10.1021/ol102216x
日期:2010.11.19
one-step, continuous flow synthesis of pyrrole-3-carboxylicacids directly from tert-butyl acetoacetates, amines, and 2-bromoketones is reported. The HBr generated as a byproduct in the Hantzsch reaction was utilized in the flow method to hydrolyze the t-butyl esters in situ to provide the corresponding acids in a single microreactor. The protocol was used in the multistep synthesis of pyrrole-3-carboxamides