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Treatment of aryl(aroyl)pyruvic acid ester metal chelates with ortho-phenylene-diamine and ethylenediamine is accompanied by an attack at the a-ketoester fragment, forming quinoxalones and piperazinones, respectively (95ZOR266, 99JFC(96)87) (Scheme 60). [Pg.304]

See other pages where Pyruvic acid quinoxalone is mentioned: [Pg.179] [Pg.914] [Pg.435] [Pg.67] [Pg.146] [Pg.55] [Pg.60] [Pg.177]