491602-36-9Relevant articles and documents
A convenient synthesis for some new pyrido [4′,3′:4,5]thieno[2,3-d]pyrimidines and related fused 1,2,4-triazolo and 1,3,4-thiadiazolo-derivatives
Ahmed, Essam Kh.
, p. 1323 - 1336 (2007/10/03)
Diethyl 2-isothiocyanato-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3,6-dicarboxylate 1 is a convenient and useful starting matrial for the constructions of heterocyclic systems. It was utilized to synthesize derivatives of the novel heterocyclic systems pyrido[4′,3′:4,5]thieno-[2,3-d]pyrimidine 4,10, pyrido[4′,3′:4,5]thieno[2,3-d]-[1,2,4]triazolo-[1,5-a]pyrimidine 7,11a-e and pyrido[4′,3′:4,5]thieno[2,3-d][1,3,4]-thiadiazolo[3,2- a]pyrimidine 12-14.