SYNTHESIS AND REACTIONS OF 3-PHENYL-3,4-DIHYDRO-1,4-QUINOXALIN-2(1H)-ONE AND ITS HETEROCYCLIC ANALOGUES
The lactams quinoxalinone 3a, benzothiazinone 3b and benzothiazinone 3c were synthesized by reactions of methyl 2-bromo-2-phenylethanoate 1 with orthosubstituted arylamines 2a-2c.Subsequent reductive alkylation of the lactams with sodium hydride and iodom