A. Deeb, M. El-Abbasy
Feb 1, 2006
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Influential Citations
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Journal
Phosphorus, Sulfur, and Silicon and the Related Elements
Abstract
7-substituted 3,4-diphenylpyrimido[4′,5′:4,5]thieno[2,3-c]pyridazines were synthesized starting from 5-amino-3,4-diphenylthieno[2,3-c]pyridazine-6-carbohydrazide (1). Reaction of carbohydrazide 1 with phthalic anhydride afforded 12,13-diphenyl-6H-pyridazino-[3″,4″: 5′,4′]thieno[3′,2′:4,5]pyrimido-[2,1-a]phthalazine-5,6-dione, (6) which underwent further transformation to the related compounds.