325170-85-2

Upstream product

• 128462-42-0 ethyl 5-amino-3,4-diphenylthieno[2,3-c]pyridazine-6-carbohydrazide 
• 555-16-8 4-nitrobenzaldehdye 
• 325170-33-0 3-amino-4,5-diphenylthieno[2,3-c]pyridazine-2-carbohydrazide 

Downstream Products

• 325170-47-6 3,4-diphenyl-8-oxopyridazo[3',4':4,5]thieno[2,3-d][1,3]thiazin-6(5H)thione 

Relevant academic research and scientific papers

Synthesis of pyridazothienothiazine and pyrimidothienopyridazines

3-amino-4,5-diphenylthieno[2,3-c]pyridazine-2-arylcarboxamide 2 underwent cyclization with triethyl orthoformate and with nitrous acid to give the pyrimidothienopyridazines 3a-c, 4b respectively, 3-amino-4,5-diphenylthieno[2,3-c] pyridazine-2-carbohydrazide 6 reacted with aromatic aldehydes to give the corresponding carbohydrazones 7a-c. Compound 7 reacts with triethyl orthoformate, acetic anhydride or with CS2/pyridine to produce pyrimidothienopyridazines 8,9 and pyridazothienothiazine 11.