Synthesis and reactions of new 4-oxo-4H-benzopyran-3-carboxaldehydes containing hydroxy groups or 2-oxopyran cycles
Lacova, Margita; Loos, Dusan; Furdik, Mikulas; Matulova, Maria; H. M. El-Shaaer;
Abstract
The synthesis of eight hydroxy- and 2-oxopyranochromone-3-carboxaldehydes 3, 5 and their reactions with 2-hydroxyaniline, 2,4-dinitrophenylhydrazine and 2-benzothiazolylhydrazine were investigated. Products were confirmed by IR, NMR spectral and elemental analysis data. The semi-empirical AM1 quantum-chemical method has been used to study optimal geometries and heats of formation of synthesized 3-formylchromones.
Other data
| Title | Synthesis and reactions of new 4-oxo-4H-benzopyran-3-carboxaldehydes containing hydroxy groups or 2-oxopyran cycles | Authors | Lacova, Margita; Loos, Dusan; Furdik, Mikulas; Matulova, Maria; H. M. El-Shaaer | Keywords | 2-Oxobenzopyrane;Enamines;Imines;Vilsmeier - Haack reaction;Am1 calculations;3-Formylchromones | Issue Date | 1-Jan-1998 | Journal | Molecules | ISSN | 14203049 | DOI | 10.3390/30600149 | Scopus ID | 2-s2.0-4344615864 |
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