Synthesis and reactions of new 4-oxo-4H-benzopyran-3-carboxaldehydes containing hydroxy groups or 2-oxopyran cycles

被引：15
|
作者：
Lacova, M [1 ]
Loos, D
Furdik, M
Matulova, M
El-Shaaer, HM
机构：
[1] Comenius Univ, Fac Nat Sci, Dept Organ Chem, SK-84215 Bratislava, Slovakia
[2] Slovak Acad Sci, Bratislava 84238, Slovakia
[3] Ain Shams Univ, Fac Educ, Dept Chem, Cairo, Egypt
来源：
MOLECULES | 1998年 / 3卷 / 06期
关键词：
3-formylchromones; Vilsmeier-Haack reaction; 2-oxobenzopyrane; imines; enamines; AM1; calculations;
D O I：
10.3390/30600149
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
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.
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页码：149 / 158
页数：10
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