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Synthesis 1985; 1985(11): 1074-1076
DOI: 10.1055/s-1985-31435
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An Improved Synthesis of 2-Nitrobenzo[b]furans

Anne Tromelin* , Pierre Demerseman, René Royer
  • *Service de Chimie de l'Institut Curie, E. R. no 213 CNRS, 26 rue d'Ulm, F-75231 Paris Cedex 05, France
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Publikationsdatum:
27. September 2002 (online)

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2-Nitrobenzo[b]furans 4 are prepared in improved yields by reacting o-hydroxybenzaldehydes 1 and bromonitromethane (2) at low temperature in order to avoid the dehydration of the aldol intermediate 3 in the alkaline condensation medium. This aldol 3 is then quantitatively dehydrated by heating in acetic anhydride.