Abstract
The promoting effect of ultrasound on the selective reduction of nitroarenes to N-arylhydroxylamines by use of Zn in an environmentally benign CO2–H2O system has been demonstrated. The yield of N-phenylhydroxylamine reaches 95 % when the reaction is carried out with a Zn-to-nitrobenzene molar ratio of 2.2 under ultrasound (40 kHz) at 25 °C and normal pressure of CO2 for 60 min. Application of ultrasound to the reaction has the advantages of higher yield of N-arylhydroxylamines, shorter reaction time, and consumption of less Zn.
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This work was supported by the Doctoral Fund of the Ministry of Education of China (grant no: 20070141046).
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Liu, S., Wang, Y., Yang, X. et al. Selective reduction of nitroarenes to N-arylhydroxylamines by use of Zn in a CO2–H2O system, promoted by ultrasound. Res Chem Intermed 38, 2471–2478 (2012). https://doi.org/10.1007/s11164-012-0562-5
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DOI: https://doi.org/10.1007/s11164-012-0562-5