Highly efficient synthesis of triazolo[1,2-a]indazole-triones and novel spiro triazolo[1,2-a]indazole-tetraones under solvent-free conditions

被引：99

作者：

Hasaninejad, Alireza ^{[1
]}

Zare, Abdolkarim ^{[2
]}

Shekouhy, Mohsen ^{[1
]}

机构：

[1] Persian Gulf Univ, Fac Sci, Dept Chem, Bushehr 75169, Iran

[2] PNU, Dept Chem, Bushehr 1698, Iran

来源：

TETRAHEDRON | 2011年 / 67卷 / 02期

关键词：

Combinatorial chemistry; Multi-component reaction; PEG-SO3H; Urazole; Triazolo[1,2-a]indazole-triones; Spiro triazolo[1,2-a]indazole-tetraone; BIGINELLI DIHYDROPYRIMIDINE SYNTHESIS; HETEROGENEOUS CATALYTIC-SYSTEM; SILICA SULFURIC-ACID; CARBONYL-COMPOUNDS; ATOM ECONOMY; MILD; CONDENSATION; DERIVATIVES; CHEMISTRY; LIBRARIES;

D O I：

10.1016/j.tet.2010.11.029

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

A new, convenient, and high yielding procedure for the synthesis of triazolo[1,2-a]indazole-triones by the condensation reaction between dimedone, aryl aldehydes, and ueazoles in the presence of a catalytic amount of sulfonated polyethylene glycol (PEG-SO3H) as a highly stable and reusable eco-friendly degradable polymeric catalyst is described under solvent-free conditions. This procedure has also been applied successfully for the synthesis of novel Spiro triazolo[1,2-a]indazole-tetraones. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：390 / 400

页数：11

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