Synlett 2010(16): 2471-2473  
DOI: 10.1055/s-0030-1258546
LETTER
© Georg Thieme Verlag Stuttgart ˙ New York

2-Aminophenols Containing Electron-Withdrawing Groups from N-Aryl Hydroxylamines

Achim Porzellea, Anthony W. J. Cooperb, Michael D. Woodrowb, Nicholas C. O. Tomkinson*a
a School of Chemistry, Main Building, Cardiff University, Park Place, Cardiff, CF10 3AT, UK
e-Mail: tomkinsonnc@cardiff.ac.uk;
b GlaxoSmithKline Medicines Research Centre, Stevenage, Hertfordshire, SG1 2NY, UK
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Publikationsverlauf

Received 19 July 2010
Publikationsdatum:
26. August 2010 (online)

Abstract

Reaction of substituted N-aryl hydroxylamines with methanesulfonyl chloride, p-toluenesulfonyl chloride, or trifluoromethanesulfonic anhydride under basic conditions leads to the rearranged 2-aminophenols (45-94%). The overall reaction sequence can be performed using polymer-supported sulfonyl chloride resin allowing for the effective conversion of N-aryl hydroxylamines to the 2-aminophenols without the need for chromatography.

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All rearrangement products were characterised by ¹H NMR, ¹³C NMR, LRMS, and HRMS.