R. A. Yanchene

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Compounds I [6], II, and III [8] were used as starting materials for the synthesis, Compound II was synthesized for the first time by fusing an equimolar mixture of o-phenylenediamine and methacrylic acid. The 5-N-acyl derivatives IV-VI were obtained by the reaction of the corresponding amines I-III with Ac20 or (EtCO)20. The 5-N-formyl derivatives VIII and(More)
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