A Solvent-Free Synthesis of Coumarins Using Phosphotungstic Acid as Catalyst

被引：33

作者：

Keri, Rangappa S. ^{[1
]}

Hosamani, Kallappa M. ^{[1
]}

Reddy, Harisha R. Seetharama ^{[1
]}

机构：

[1] Karnatak Univ, PG Dept Studies Chem, Dharwad 580003, Karnataka, India

来源：

CATALYSIS LETTERS | 2009年 / 131卷 / 1-2期

关键词：

Coumarin; Phosphotungstic acid; Pechmann condensation; Solvent free conditions; PECHMANN REACTION; 12-TUNGSTOPHOSPHORIC ACID; REUSABLE CATALYST; IONIC LIQUID; WATER; CONDENSATION; CHEMISTRY; PHENOLS; ESTERS;

D O I：

10.1007/s10562-009-9940-z

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Phosphotungstic acid (PTA) is used an efficient catalyst for the von Pechmann condensation reaction of phenols and beta-keto esters under solvent-free conditions. This method was compared with those of the reactions in the different solvents and catalysts. The methodology presented offers significant improvements for the synthesis of coumarins with regard to yield of products, simplicity in operation and green aspects by avoiding toxic conventional catalysts and solvents.

引用

页码：321 / 327

页数：7

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