Environmentally friendly efficient synthesis and mechanism of Triazenes derived from cyclic amines on Clays and Zeolites
Publish place: Iran International Zeolite Conference
Publish Year: 1387
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ZEOLITE01_188
تاریخ نمایه سازی: 30 دی 1387
Abstract:
The formation of diazotizing reagent starts with protonation of nitrous acid under strongly acidic
conditions, and azo coupling carried out at low temperature in the presence of nucleophilic coupling
components [1]. These conventional acid–base catalyzed processes are effective for the near quantitative
formation of the desired products. But the main limitation of such synthetic processes is their environmental
incompatibility. The acidic and basic effluents from the laboratory and industry produce permanent damage
to the environment and disturb the ecological balance [2]. Clays have long been used as acidic catalysts and
existence of both Lewis and Bronsted acid sites [3]. Montmorillonite clay, enable to function as an effcient
solid acid catalyst in organic transformations with excellent product, regio- and stereo-selectivity [4].
Nowadays more and more heterogeneous Bronsted acids, e.g. zeolites are utilized, the excellent catalytic
abilities are due to the presence of Bronsted and Lewis acid centers in the zeolite structure [5]. Because of its
high protonic acidity and unique shape-selective behavior,
Authors
a Teimouri
Chemical Engineering Department, Amirkabir University of Technology
a Najafi Chermahini
Department of Chemistry, Yasuj University, Yasuj
h.a Dabbagh
Department of Chemistry, Isfahan University of Technology, Isfahan
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