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NOVEL METHOD FOR THE SYNTHESIS OF 3-[(3-ARYLPYRAZOL-5-YL)METHYLIDENE]QUINOXALIN-2-ONES ON THE BASIS OF 2-METHYLCHROMONES

Александр В. Сафрыгин, Дарья A. Ветюгова, Вячеслав Я. Сосновских
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Abstract


3-(Chromon-2-ylmethylidene)quinoxalin-2-ones reacts with hydrazine hydrate in boiling n-BuOH at the chromone moiety to form 3(3arylpyrazol-5-ylmethylidene)quinoxalin-2-ones in 47–86% yields.

 


Keywords


3-(chromonylmethylidene)quinoxalin-2-ones; diethyl oxalate; hydrazine hydrate; 2-methylchromones; о-phenylenediamine; 3-(pyrazolylmethylidene)quinoxalin-2-ones

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Latvian Institute of Organic Synthesis - Aizkraukles iela, 21, Riga, LV-1006, Latvia - hgs@osi.lv