Zeolite supported Bronsted-acid ionic liquids: an eco approach for synthesis of spiro[indole-pyrido[3,2-e]thiazine] in water under ultrasonication

被引：70

作者：

Arya, Kapil ^{[1
]}

Rawat, Diwan Singh ^{[1
]}

Sasai, Hiroaki ^{[2
]}

机构：

[1] Univ Delhi, Dept Chem, Delhi 110007, India

[2] Osaka Univ, ISIR, Ibaraki, Osaka 5670047, Japan

来源：

GREEN CHEMISTRY | 2012年 / 14卷 / 07期

关键词：

FRIEDEL-CRAFTS REACTIONS; CROSS-COUPLING REACTIONS; ULTRASOUND; CHEMISTRY; CATALYSIS; TEMPERATURE; IMMOBILIZATION; SONOCHEMISTRY; CAVITATION; COMPLEXES;

D O I：

10.1039/c2gc35168d

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

A zeolite supported Bronsted-acid catalyst system has been developed using different Bronsted-acid ionic liquids supported on ZSM-5 zeolite. Catalytic activity was tested via aqueous-mediated ultrasound-promoted synthesis of novel N-substituted spiro heterocycles, which does not take place under conventional conditions. The yield of the desired products was increased in the presence of ultrasonication compared to those of conventional and MW techniques. In the presence of ultrasonication, the recyclability of this novel catalyst system was studied. There was no loss of catalytic activity up to five cycles whereas a significant loss was observed in the presence of MWs.

引用

页码：1956 / 1963

页数：8

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