157139-76-9Relevant articles and documents
A Synthesis of Heterocyclic Ring Systems. Pyridothienopyrrolizine and Pyridodithienodipyrrolizine
Peinador, Carlos,Veiga, M. Carmen,Vilar, Juan,Quintela, Jose M.
, p. 1299 - 1306 (2007/10/02)
A synthesis for two new polycyclic heterocyclic ring systems is reported.Cyclization of pyrrolidinocarboxamide derivatives of ethyl 3-(pyrrol-1-yl)thienopyridine-2-carboxylate (4) and ethyl 3,5-di(pyrrol-1-yl)dithienopyridine-2,6-dicarboxylate (11) afford iminium salts that were transformed into the new heteropolycyclic compounds (6) and (13), respectively.