Flow synthesis of oxadiazoles coupled with sequential in-line extraction and chromatography
作者:Kian Donnelly、Marcus Baumann
DOI:10.3762/bjoc.18.27
日期:——
continuous flow process is reported for the synthesis of various 1,3,4-oxadiazoles via an iodine-mediated oxidative cyclisation approach. This entails the use of a heated packed-bed reactor filled with solid K2CO3 as a base. Using DMSO as solvent, this flow method generates the target heterocycles within short residence times of 10 minutes and in yields up to 93%. Scale-up of this flow process was