Mass Spectra of Some Substituted 2-Chloro-pyridones

Mass spectra of 2-chloro-3-(2'-chloroethyl)4-hydroxy-6-pyridone, 2-chloro-3-(2'­ch1oroethyl)-5-nitr04hydroxy-6-pyridone, 2-chloro-l,6,4' ,5' -tetrahydr0-6-oxo-furano(3' ,2' -3,4 )-pyri­dine, 2-chloro-l,6,4' ,5' -tetrachydro-5-brom0-6-oxo-furano (3',2'-3,4) pyridine and 6-acetoxy-2-chloro­4',5'-dihydrofurano (3',2'-3,4) pyridine (I-V) have been studied and their fragmentation patterns have been rationalized. 1n all these compounds a bicyclie ion has been found to be very stable which loses chlorine (except in compound II) to give a very stable ion of mass 136.

F H SAEED ,N A ZAIDI ,J M AL KATTI ,