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.

引用

页码：149 / 158

页数：10