THE SYNTHESIS OF 2<i>H</i>-PYRIDO[3,4-<i>c</i>][1,2]BENZOXAZINE-2,4(3<i>H</i>)-DIONES FROM 6-OXO-6<i>H</i>-1,2-OXAZINE-3-CARBOXYLATES
DOI:
https://doi.org/10.1007/7070Keywords:
imides, nitroacetic esters, oxazinones, condensationAbstract
A simple procedure was developed for the synthesis of 2H-pyrido[3,4-c][1,2]benzoxazine-2,4(3H)-diones by the treatment of ofluorophenyl-substituted 6-oxo-6H-1,2-oxazine-3-carboxylates with primary amines. The reaction proceeded according to the mechanism previously described for the formation of 3-(hydroxyimino)pyridine-2,6-diones followed by intramolecular nucleophilic substitution involving the hydroxyimino group to form the 1,2-oxazine ring.
Authors: Dmitry S. Ivanov, Elvira R. Zaitseva, Alexander Yu. Smirnov*, Alexey V. Nizovtsev, Nadezhda S. Baleeva, Mikhail S. Baranov
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Published
2023-02-21
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Short Communications