Abstract
Methodology of a selection and environmental economy in nitration reaction of aromatics will be rather attractive to replace traditional sulfonitric acid process in industry. The cross-linked pillared clays originated from a natural bentonite show an obviously selective catalysis in nitration reaction of alkylbenzenes by respectively using nitric acid and a nitrogen dioxide/molecular oxygen system when compared with Kyodai-nitration. Several hydroxyl-aluminum cross-linked bentonites (Al-CLB, NH4Al-CLB, HAl-CLB, LaAl- CLB) were prepared in various conditions from a natural bentonite with polymeric cationic complexes of aluminum as pillars or crosslinkers. When they were applied in the nitration of weakly activated aromatic substrates, a para-preferential nitration is achieved.
Keywords: Alkylbenzenes, clays, Kyodai-nitration, Nitration, Nitric acid, Nitrogen dioxide, Regioselectivity
Current Organic Chemistry
Title:Regioselectivity of the Liquid-phase Mononitration of Weakly Activated Arenes Over Cross-linked Clays
Volume: 16 Issue: 12
Author(s): Xinhua Peng, Xiongzi Dong and Yanfang Tai
Affiliation:
Keywords: Alkylbenzenes, clays, Kyodai-nitration, Nitration, Nitric acid, Nitrogen dioxide, Regioselectivity
Abstract: Methodology of a selection and environmental economy in nitration reaction of aromatics will be rather attractive to replace traditional sulfonitric acid process in industry. The cross-linked pillared clays originated from a natural bentonite show an obviously selective catalysis in nitration reaction of alkylbenzenes by respectively using nitric acid and a nitrogen dioxide/molecular oxygen system when compared with Kyodai-nitration. Several hydroxyl-aluminum cross-linked bentonites (Al-CLB, NH4Al-CLB, HAl-CLB, LaAl- CLB) were prepared in various conditions from a natural bentonite with polymeric cationic complexes of aluminum as pillars or crosslinkers. When they were applied in the nitration of weakly activated aromatic substrates, a para-preferential nitration is achieved.
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Cite this article as:
Peng Xinhua, Dong Xiongzi and Tai Yanfang, Regioselectivity of the Liquid-phase Mononitration of Weakly Activated Arenes Over Cross-linked Clays, Current Organic Chemistry 2012; 16 (12) . https://dx.doi.org/10.2174/138527212800672565
DOI https://dx.doi.org/10.2174/138527212800672565 |
Print ISSN 1385-2728 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5348 |
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