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Regioselective nitration of aromatics under phase-transfer catalysis conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
51714 46851 2011 6 PDF Available
Title
Regioselective nitration of aromatics under phase-transfer catalysis conditions
Abstract

Mononitration of aromatics was performed in a two-phase system using phase-transfer catalyst. The most advantageous conditions for the nitration were determined (temperature, reaction time, the type and amount of phase transfer catalyst, nitrification strength of the nitro-sulfuric acid). From the results, a significant improvement in the selectivity and conversion of the nitration of xylene was observed: the ratio of 4-nitro-m-xylene to 2-nitro-m-xylene was unprecedented increased up to 91.3%:7.7%, the ratio of 4-nitro-o-xylene to 3-nitro-o-xylene was also increased to 71.1%:27.2%; both the conversions were over 96%.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Unreported high regioselectivity of disubstituted aromatics was obtained with PTC. ► Mixed acid was significantly reduced and valuable for industry application. ► Quantitative calculation of C atoms' net charge on substituted benzenes was carried.

Keywords
Phase-transfer catalysis nitration; Aromatic compounds; Quantitative calculation; Regioselectivity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 14, Issue 1, 25 October 2011, Pages 42–47
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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Full-text PDF Download
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