Regioselectivity of the Liquid-phase Mononitration of Weakly Activated Arenes Over Cross-linked Clays

Author(s): Xinhua Peng, Xiongzi Dong, Yanfang Tai.

Journal Name: Current Organic Chemistry

Volume 16 , Issue 12 , 2012

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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

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Article Details

Year: 2012
Page: [1549 - 1553]
Pages: 5
DOI: 10.2174/138527212800672565
Price: $58

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