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Comparative kinetic studies on the synthesis of quinoxalinone derivatives and pyrido[2,3-b]pyrazinone derivatives by the hinsberg reaction

✍ Scribed by Diana G. Bekerman; Maria Inés Abasolo; Beatriz M. Fernández


Book ID
112130247
Publisher
Journal of Heterocyclic Chemistry
Year
1992
Tongue
English
Weight
312 KB
Volume
29
Category
Article
ISSN
0022-152X

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## Abstract A series of pyrido[2,3‐__d__]pyrimidine‐4,7‐diones 5a‐h were prepared from 6‐amino‐4‐pyrimidones 1 and benzylidene Meldrum's acid derivatives 2 by cyclization reactions in boiling nitrobenzene. The structure of 5, determined by nmr measurements, reveals a selective orientation of 1 and