E. Kantharaj et Vs. Iyer, EFFECT OF N-SUBSTITUTION IN THE FRAGMENTATION MODES OF -DIFLUORO-2,3-DIHYDRO-3-METHYL-4H[1,4]BENZOXAZINES ON ELECTRON-IMPACT, Indian Journal of Heterocyclic Chemistry, 6(3), 1997, pp. 177-180
The fragmentation process of diagnostic interest in Ofloxacin is the c
leavage of 1,4-oxazine ring through beta-hydrogen migration of C-3 hyd
rogen to the oxygen resulting in the elimination of CH3-C=CH2 radical
to yield the ion d at m/z 276 from the [M-CO2](+) ion.