Synthesis of 2,5-di(2-thienyl)-1H-pyrrole N-linked with conjugated bridges
作者:P.E Just、K.I Chane-Ching、P.C Lacaze
DOI:10.1016/s0040-4020(02)00328-9
日期:2002.4
The Knorr-Paal reaction of 1,4-di(2-thienyl)-1,4-butanedione with anilines to yield N-substituted-2,5-di-(2-thienyl)-1H-pyrroles (SNS derivatives) was tested by using different acid catalysts in toluene and acetic acid. Di-SNS derivatives were also synthesized in toluene at reflux in the presence of propionic acid, these mild conditions giving acceptable yields in a one-step procedure. (C) 2002 Elsevier Science Ltd. All rights reserved.