Recherches en série hétérocyclique. XXVII. Etude de la condensation de l'azidoacétate d'éthyle sur les thiophènedicarbaldéhydes-2,5, -2,4 et -3,4

Abstract

Ethyl azidoacetate reacts with 2,5-, 2,4-, and 3,4-thiophenedialdehydes to yield products of both mono- and dicondensation. Cyclization of the thiophene derivatives thus obtained leads to substituted thienopyrroles, to systems involving two pyrrole rings orthocondensed to one thiophene ring, or to thieno[3,4-c]pyridones and pyridines. The structures of the compounds obtained from various syntheses were established by nmr. [Journal translation]