79080-32-3Relevant articles and documents
Competing Pathways in the Phototransposition of Pyrazoles
Barltrop, John A.,Day, A. Colin,Mack, Arthur G.,Shahrisa, Aziz,Wakamatsu, Shigeru
, p. 604 - 606 (1981)
Cyano-substituted pyrazoles transpose photochemically into imidazoles by two concurrent paths: (a) 1,5-interchange, probably by 2,5-bonding to a diazabicyclopentene which isomerises by nitrogen 'walk' before rearomatisation, and (b) 2,3-interchange, probably via an intermediate azirine; in sharp contrast, 1,5-dimethyl-3-trifluoromethylpyrazole phototransposes exclusively by the former path.