325170-33-0

Upstream product

• 94011-79-7 3-chloro-5,6-diphenylpyridazine-4-carbonitrile 
• 850075-65-9 ethyl 5-acetylamino-3,4-diphenylthieno[2,3-c]pyridazine-6-carboxylate 

Downstream Products

• 325170-66-9 3-amino-2-[2-mercaptooxadiazol-5-yl]-4,5-diphenylthieno[2,3-c]pyridazine 
• 325170-87-4 5-Amino-3,4-diphenyl-thieno[2,3-c]pyridazine-6-carboxylic acid [1-(4-chloro-phenyl)-meth-(E)-ylidene]-hydrazide 
• 325170-85-2 5-Amino-3,4-diphenyl-thieno[2,3-c]pyridazine-6-carboxylic acid [1-(4-nitro-phenyl)-meth-(E)-ylidene]-hydrazide 
• 325170-37-4 5-amino-3,4-diphenylthieno[2,3-c]pyridazine-6-benzylidenecarbohydrazide 
• 135127-79-6 8,9-diphenylpyrimido<4',5':4,5>thieno<2,3-c>pyridazin-4(3H)-one 
• 189894-90-4 8-chloro-3,4-diphenylpyrimido[4',5':4,5]thieno[2,3-c]pyridazine 

Relevant academic research and scientific papers

Pyridazine derivatives and related compounds. Part 11: 1Synthesis of some pyrimido[4′,5′:4,5]thieno[2,3-c] pyridazines

3-Substituted pyrimido[4′,5′:4,5]thieno[2,3-c/pyridazine-2,4- di-ones and 3-amino-2-methylpyrimido[4′,5′:4,5]thieno[2,3-c] pyridazine-4-ones were synthesized starting from ethyl 5-aminothieno[2,3-c] pyridazine-6-carboxylate 1. Reaction of amino ester 1 with phenyl isothiocyanate affords thiourea derivative 10 which undergo further transformation to the related fused heterocyclic systems.