A novel synthesis of some 1,4-phenylene-bis-heterocyclic carboxamide derivatives
作者:Fathy M. Abdelrazek、Nadia H. Metwally、Nazmi A. Kassab、Nehal A. Sobhy
DOI:10.1002/jhet.257
日期:2009.11
4‐phenylene)bis(5‐cyano‐6‐oxo‐2‐phenyl‐1,6‐dihydropyridine‐3‐carboxamide) 9a while 8b was cyclized to afford the 6‐thioxo analogue 9b. Compound 2 reacts with hydrazine derivatives 10a, 10b in refluxing ethanol/piperidine to afford the hydrazinylacrylamide derivatives 11a, 11b, which have been cyclized to the corresponding N,N′‐(1,4‐phenylene)bis(1H‐pyrazole‐4‐carboxamide) derivatives 12a, 12b, respectively. Compound