40995-50-4

Basic information

• Product Name: 4H-Pyrazolo[3,4-d]pyridazin-4-one, 1,5-dihydro-1,5-dimethyl-
• CAS NO: 40995-50-4
• Molecular Formula: C7H8N4O
• Mol File: 40995-50-4.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: 4H-Pyrazolo[3,4-d]pyridazin-4-one, 1,5-dihydro-1,5-dimethyl-(CAS DataBase Reference)
• NIST Chemistry Reference: 4H-Pyrazolo[3,4-d]pyridazin-4-one, 1,5-dihydro-1,5-dimethyl-(40995-50-4)
• EPA Substance Registry System: 4H-Pyrazolo[3,4-d]pyridazin-4-one, 1,5-dihydro-1,5-dimethyl-(40995-50-4)

Safety Data

• Hazardous Substances Data: 40995-50-4(Hazardous Substances Data)

Upstream product

• 186581-53-3 diazomethane 
• 22687-56-5 2-methylpyridazin-3(2H)-one 
• 67264-09-9 5-Bromo-2-methyl-2H-pyridazin-3-one 
• 14628-34-3 5-chloro-2-methyl-3(2H)-pyridazinone 

Relevant articles and documents

1,3-Dipolar cycloaddition of diazomethane to differently substituted 2-methylpyridazin-3(2H)-ones

Cycloaddition of diazomethane to 4- or 5-substituted 2-methylpyridazin-3 (2H)-ones 1,2 occurs in a practically regiospecific manner to give the expected adducts, which are not stable enough to be isolated and under the reaction conditions are transformed into N, N′-dimethylpyrazolopyridazinones and/or 2,4 (or 2,5)-dimethylpyridazin-3(2H)-ones, depending on the nature and position of the substituents. The regiochemistry of the cycloaddition and the reactivity of pyridazin-3 (2H)-ones 1,2 have been accounted for theoretically by the FMO approach.