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Molecules 1998, 3(6), 149-158; doi:10.3390/30600149
Article

Synthesis and Reactions of New 4-Oxo-4H-benzopyran-3-carboxaldehydes Containing Hydroxy Groups or 2-Oxopyran Cycles

1,* , 1, 1, 2 and 3
Received: 27 January 1998; Accepted: 14 April 1998 / Published: 15 May 1998
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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.
Keywords: 3-Formylchromones; Vilsmeier - Haack reaction; 2-oxobenzopyrane; imines; enamines; AM1 calculations 3-Formylchromones; Vilsmeier - Haack reaction; 2-oxobenzopyrane; imines; enamines; AM1 calculations
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MDPI and ACS Style

Lacova, M.; Loos, D.; Furdik, M.; Matulova, M.; El-Shaaer, H.M. Synthesis and Reactions of New 4-Oxo-4H-benzopyran-3-carboxaldehydes Containing Hydroxy Groups or 2-Oxopyran Cycles. Molecules 1998, 3, 149-158.

AMA Style

Lacova M, Loos D, Furdik M, Matulova M, El-Shaaer HM. Synthesis and Reactions of New 4-Oxo-4H-benzopyran-3-carboxaldehydes Containing Hydroxy Groups or 2-Oxopyran Cycles. Molecules. 1998; 3(6):149-158.

Chicago/Turabian Style

Lacova, Margita; Loos, Dusan; Furdik, Mikulas; Matulova, Maria; El-Shaaer, Hafez M. 1998. "Synthesis and Reactions of New 4-Oxo-4H-benzopyran-3-carboxaldehydes Containing Hydroxy Groups or 2-Oxopyran Cycles." Molecules 3, no. 6: 149-158.



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