91319-36-7

Basic information

• Product Name: 5,6-dihydro-2-phenyl-6-(3,5-dioxo-4-phenyl-1,2,4-triazolin-1-yl)thieno<3,2-c><1,2,4>triazolo<1,2-a>pyridazine-1,3-dione
• CAS NO: 91319-36-7
• Molecular Weight: 460.473
• Mol File: 91319-36-7.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 5,6-dihydro-2-phenyl-6-(3,5-dioxo-4-phenyl-1,2,4-triazolin-1-yl)thieno<3,2-c><1,2,4>triazolo<1,2-a>pyridazine-1,3-dione(CAS DataBase Reference)
• NIST Chemistry Reference: 5,6-dihydro-2-phenyl-6-(3,5-dioxo-4-phenyl-1,2,4-triazolin-1-yl)thieno<3,2-c><1,2,4>triazolo<1,2-a>pyridazine-1,3-dione(91319-36-7)
• EPA Substance Registry System: 5,6-dihydro-2-phenyl-6-(3,5-dioxo-4-phenyl-1,2,4-triazolin-1-yl)thieno<3,2-c><1,2,4>triazolo<1,2-a>pyridazine-1,3-dione(91319-36-7)

Safety Data

• Hazardous Substances Data: 91319-36-7(Hazardous Substances Data)

Upstream product

• 1918-82-7 2-vinylthiophene 
• 4233-33-4 4-Phenyl-1,2,4-triazolidine-3,5-dione 

Relevant articles and documents

Ring Cleavage of a 3-Azidothiophene: Novel Extrusion of Acetylene

Mild thermal decomposition of ethyl 2-azido-3-(3-azido-2-thienyl)propenoate (8) results in the cleavage of the thiophene ring with extrusion of acetylene and formation of ethyl 5-cyanoisothiazole-3-carboxylate (10), together with ethyl thienopyridazine-3-carboxylate (9).The former reaction represents the first fragmentation of a five-membered heteroaromatic β-nitrene to extrude an acetylene, and the latter reaction is a rare example of formal intramolecular coupling of nitrenes in solution themolysis.This vinyl azide group is necessary for this cleavage of the thiophene ring and a mechanism is proposed in which the derived nitrene co-ordinates with the thiophene sulphur atom to facilitate ring fragmentation.The analogous furan does not fragment similarly.Diels-Alder cycloadditions of 4-phenyl-1,2,4-triazole-3,5-dione to 2-vinylthiophenes were investigated as an independent approach to the thienopyridazine system, but the fused 4-phenyl-1,2,4-triazoline-3,5-dione ring proved resistant to hydrolytic cleavage.