Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2012-11-01

Journal: RESEARCH ON CHEMICAL INTERMEDIATES

Included Journals: Scopus、EI、SCIE

Volume: 38

Issue: 9

Page Number: 2471-2478

ISSN: 0922-6168

Key Words: Nitroarenes; Reduction; Zn; CO2-H2O; Ultrasound; N-Arylhydroxylamines

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 A degrees 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.