Potassium dodecatungstocobaltate trihydrate (K5CoW12O40•3H2O):: A mild and efficient reusable catalyst for the synthesis of aryl-14H-dibenzo[a.j]xanthenes under conventional heating and microwave irradiation

被引：226

作者：

Nagarapu, Lingaiah ^{[1
]}

Kantevari, Srinivas ^{[1
]}

Mahankhali, Venu Chary ^{[1
]}

Apuri, Satyender ^{[1
]}

机构：

[1] Indian Inst Chem Technol, Organ Chem Div 2, Hyderabad 500007, Andhra Pradesh, India

来源：

CATALYSIS COMMUNICATIONS | 2007年 / 8卷 / 08期

关键词：

potassium dodecatungstocobaltate trihydrate; heterogeneous catalyst; solvent-free media; microwave irradiation; one-pot condensation; aryl-14H-dibenzo[a.j]xanthenes; ALCOHOLS; FACILE;

D O I：

10.1016/j.catcom.2006.11.003

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：

A simple and efficient procedure has been developed for the preparation of aryl-14H-dibenzo[a.j]xanthenes by a one-pot condensation of beta-naphthol and aryl aldehydes, in the presence of potassium dodecatungstocobaltate trihydrate [K5CoW12O40 center dot 3H(2)O, (0.01 mol%)] as a heterogeneous catalyst in a solvent-free media using both conventional heating and microwave irradiation. The present methodology offers several advantages such as excellent yields, simple procedure, short reaction times (1.5-2.0 h and 2.0-3.0 min) and milder conditions and the catalyst exhibited remarkable reusable activity. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1173 / 1177

页数：5

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