An environmentally friendly synthesis of 1,4-dihydropyrano [2,3-c]pyrazole derivatives catalyzed by tungstate sulfuric acid

被引：30

作者：

Farahi, Mahnaz ^{[1
]}

Karami, Bahador ^{[1
]}

Sedighimehr, Iman ^{[1
]}

Tanuraghaj, Hamideh Mohamadi ^{[1
]}

机构：

[1] Univ Yasuj, Dept Chem, Yasuj 7591874831, Iran

来源：

CHINESE CHEMICAL LETTERS | 2014年 / 25卷 / 12期

关键词：

6-Amino-4-aryl-5-cyano-3-methyl-1-phenyl-1,4-dihydropyrano[2,3-c]pyrazoles; 3-Methyl-1-phenyl-2-pyrazolin-5-one; Aromatic aldehyde; Malononitrile; Tungstate sulfuric acid; ONE-POT SYNTHESIS; RECYCLABLE CATALYST;

D O I：

10.1016/j.cclet.2014.07.012

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An efficient three-component synthesis of 6-amino-4-aryl-5-cyano-3-methyl-1-phenyl-1,4-dihydropyrano[2,3-c]pyrazoles via a reaction between 3-methyl-1-phenyl-2-pyrazolin-5-one, aromatic aldehydes and malononitrile using tungstate sulfuric acid as a catalyst was described. Mild conditions, good to excellent yields, easily available catalyst and easy work-up are the key features of this method. (C) 2014 Bahador Karami. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

引用

页码：1580 / 1582

页数：3

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