Synthesis and Reactions of 3??Phenyl??3, 4??Dihydro??1, 4??Quinoxalin??2 (1H)??One and its Heterocyclic Analogues

TO Olagbemiro, CA Nyakutse, L Lajide…

Index: Olagbemiro, T.O.; Nyakutse, C.A.; Lajide, L.; Agho, M.O.; Chukwu, C.E. Bulletin des Societes Chimiques Belges, 1987 , vol. 96, # 6 p. 473 - 480

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Citation Number: 9

Abstract

Abstract 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 iodomethane afforded only the N-alkylated quinoxalinone 4a and benzothiazinone 4b. Lithium aluminium hydride reduction of the lactams 3a-3c gave the dihydro-derivatives 5a, ...