A. Kotali et Pa. Harris, SYNTHESIS AND ELECTRON-IMPACT MASS-SPECTRA OF 3-SUBSTITUTED 2-ACYLAMINOINDAZOLES, Journal of heterocyclic chemistry, 33(3), 1996, pp. 605-606
3-Substituted-2-acylaminoindazoles 2 were prepared via oxidative cycli
zation of o-aminoaryl ketone acylhydrazones 1 with iodosobenzene diace
tate. Their electron ionization mass spectra were recorded and in addi
tion to the molecular ions show common fragmentation pathways correspo
nding to the [M-N-2](+), [M-NHCOX](+) and [M-COX](+) ions, with some i
nfluence on the skeletal fragmentation by different substituents.