Abstract
The N-bromosuccinimide (NBS) bromination of six 1-methylphenazine derivatives (I-VI) possessing either a methoxyl or an acetoxyl function at C4, C6, or C9 was studied. It has been found that a methoxyl group attached at C4 disturbs the allylic bromination of C1-methyl by NBS while a methoxyl group at C6 or C9 does only partly. An acetoxyl group existing at C4, C6, or C9, however, has been noticed not to disturb the allylic bromination at C1-methyl function, but the expected product has been secured.
