One-pot synthesis of coumarins - Catalysis by the solid base, calcined Mg-Al hydrotalcite

被引：57

作者：

Ramani, A ^{[1
]}

Chanda, BM ^{[1
]}

Velu, S ^{[1
]}

Sivasanker, S ^{[1
]}

机构：

[1] Natl Chem Lab, Pune 411008, Maharashtra, India

来源：

GREEN CHEMISTRY | 1999年 / 1卷 / 03期

关键词：

D O I：

10.1039/a903173a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The synthesis of coumarins (2H-benzopyran-2-ones) via Knoevenagel condensation over a recoverable, inexpensive solid base catalyst, calcined Mg-Al hydrotalcite, is reported for the first time. This method produces substituted coumarins in very high yields (> 85%) and selectivities (ca. 100%) when aromatic hydroxy aldehydes are reacted with 2-substituted ethyl acetate.

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页码：163 / 165

页数：3

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