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8 results on '"Osipov, D."'

6. Synthesis of 2-Nitro-1 H-Benzo[ f]Chromenes.

Author

Osyanin, V., Lukashenko, A., Osipov, D., and Klimochkin, Yu.

Subjects
MANNICH bases, AMINES, ACETIC anhydride, QUINONE, ALKENES, HETEROCYCLIC compounds synthesis
Abstract

The reaction of Mannich bases derived from 2-naphthol with 4-(2-nitrovinyl)morpholine or N,N-di-methyl(2-nitrovinyl)amine in acetic anhydride gives 2-nitro-1H-benzo[f]chromenes. This reaction may be regarded formally as the addition of a push-pull olefin acting as a 1,2-ambiphile with naphthalenic o-quinone methide acting as a 1,4-ambiphilic reagent. [ABSTRACT FROM AUTHOR]

Published
2015
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7. Novel Method for the Synthesis of 1,5-Dihydro-2 h-Chromeno[2,3- D]Pyrimidine-2,4(3 h)-Diones.

Author

Osyanin, V., Osipov, D., Pavlov, S., and Klimochkin, Yu.

Subjects
CHEMICAL reactions, PYRIMIDINE derivatives, PYRIMIDINE metabolism, SODIUM salts, CHEMICAL processes
Abstract

The article discusses the scientific method for the synthesis of 1,5-dihydro-2H-chromeno[2,3-d]pyrimidine-2,4(3H)-diones from o-benzoquionone methide precursors including quaternary ammonium salt, mannich base and hydroxybenzyl alcohols. The chemical reactions of methide precursors were out by refluxing an equimolar mixture of reagents into an acetic acid. It conclude that advantages for developing method for preparing 2H-chromeno[2,3-d]pyrimidinediones uses o-benzoquionone methide precursors.

Published
2014
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