1,3-dipolar cycloadditions induced by cation radicals. Formation of 1,2,4-triazoles from oxidative addition of 1,4-diphenylazomethane and aryl aldehyde phenylhydrazones to nitriles
作者:A.K.M.Mansurul Hoque、Albert C. Kovelesky、Lee Wang-Keun、Henry J. Shine
DOI:10.1016/s0040-4039(01)80911-4
日期:1985.1
Reaction of thianthrenecationradicalperchlorate (Th.+ClO4−) with 1,4-diphenylazomethane (DPAM) in MeCN and EtCN led to the formation of 1,2,4-triazoles. Triazoles formation is attributed to oxidative cycloaddition of benzaldehyde benzylhydrazone, the tautomer of DPAM, to the solvent nitriles. In confirmation, analogous cycloadditions were achieved by reaction of Th.+ClO4− with some benzaldehyde