634907-01-0

Upstream product

• 104-88-1 4-chlorobenzaldehyde 
• 634907-00-9 4,7-dihydrazino(1,2,3)triazino[4'',5'':4',5']thieno[3',2':4,5]thieno[3,2-d][1,2,3]triazine 
• 133180-61-7 (1,2,3)triazino[4'',5'':4',5']thieno[3',2':4,5]thieno[3,2-d][1,2,3]triazine-4,7-diol 
• 634906-93-7 4,7-dichloro(1,2,3)triazino[4'',5'':4',5']thieno[3',2':4,5]thieno[3,2-d][1,2,3]triazine 
• 92305-06-1 3,4-diamino-2,5-dicarboxamidothieno(2,3-b)thiophene 

Relevant academic research and scientific papers

Synthesis of some new polyfused thienothiophenes part 4: Synthesis of thienopyrimidine, thienotriazine, thienoimidazotriazine, thienotriazolotriazine, and thienotetrazolotriazine derivatives

3,4-Diamino-2,5-dicarboxamidothieno(2,3-b)thiophene 1 was allowed to react with CS2, carbonyl compounds, ethyl chloroformate, S,S-acetals, and oxallyl chloride to give thienopyrimidines 2-6 and thieno1,4-diazepine 7. Treatment of compound 1 with nitrous acid afforded compound 8, which converted into the corresponding chloro derivative 9 by using PCl5. Compound 9 was reacted with amino reagents to afford the corresponding thienoimidazotriazines 10 and 11, thienotriazolotriazines 12 and 13 and 4-hydrazinothienotriazine 14. Treatment of compound 14 with aldehydes, triethyl orthoformate, CS2, nitrous acid and ylidenemalononitriles, afforded thienotriazolotriazine 16-18, thienotetrazolotriazine 19, and 4-pyrazolyl-thienotriazine 20-22 derivatives respectively.