Solvent free synthesis of coumarins using environment friendly solid acid catalysts

被引：29

作者：

Ghodke, Shrinivas ^{[1
]}

Chudasama, Uma ^{[1
]}

机构：

[1] Maharaja Sayajirao Univ Baroda, Fac Engn & Technol, Dept Appl Chem, Vadodara 390001, Gujarat, India

来源：

APPLIED CATALYSIS A-GENERAL | 2013年 / 453卷

关键词：

Solid acid catalyst; Zirconium(IV) Phosphotungstate; 12-TPA supported solid acid catalyst; Coumarin derivatives; Pechmann condensation; Microwave-assisted synthesis; PECHMANN CONDENSATION; METAL(IV) PHOSPHATES; PHOSPHOTUNGSTIC ACID; SULFATED-ZIRCONIA; 7-HYDROXYCOUMARINS; CYCLODEHYDRATION; DERIVATIVES; ALKYLATION; SALTS;

D O I：

10.1016/j.apcata.2012.12.024

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：

Solid acid catalysts, ZrPW (Zirconium(IV) Phosphotungstate) and 12-TPA/ZrO2 [12-Tungstophosphoric acid (12-TPA) supported onto ZrO2] have been synthesized. The catalysts have been characterized for chemical stability, elemental analysis by ICP-AES, TGA, FTIR, SEM, EDX, XRD, surface area (BET) and surface acidity (NH3-TPD). The performance of these materials as solid acid catalysts has been explored by studying Pechmann condensation as a model reaction, wherein phenols have been treated with methyl acetoacetate to give coumarins, under solvent free conditions using conventional heating as well as microwave heating. Catalytic activity of both the solid acid catalysts have been compared and correlated with surface properties of the materials. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：219 / 226

页数：8

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