Starting with ethyl 5-amino-3,4-diphenylthieno[2,3-c]pyridazine-6-carboxyl-ate, the syntheses of 2-methyl-8,9-diphenyl-4H-pyridazino[4′,3′:4,5]thieno[3,2-d]-1,3-oxazin-4-one (1), 7-amino-6-methyl-8-oxo-3,4-diphenyl-7,8-dihydropyrimido-[4′,5′:4,5]thieno[2,3-c]pyridazine (3), and some related compounds are described.
Phosphorus, Sulfur, and Silicon and the Related Elements
Volume 181, 2006 - Issue 1
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Related Research Data
Utility of ethyl 5-aminothieno[2,3-c]pyridazine-6-carboxylate in heterocyclic synthesis
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