Synthesis of thiazolo[3,2-a]pyridines from enaminoesters by tandem conjugate addition-cyclization
摘要:
Several representative compounds with the new heterocyclic system thiazolo[3,2-a]pyridine have been obtained by condensation between alpha,beta-unsaturated ketoesters and the N-mercaptoethylenamines of beta-ketoesters in a tandem conjugate addition-cyclization process. The stereochemistry of these products is different from that observed for the products obtained from related N-hydroxyethylenamines. (C) 1997 Elsevier Science Ltd. All rights reserved.