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Synthesis 2000; 2000(13): 1814-1816
DOI: 10.1055/s-2000-8237
short paper
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New One-Step Synthesis of 2-Aryl-1H-Imidazoles: Dehydrogenation of 2-Aryl-Δ2-Imidazolines with Dimethylsulfoxide

Maria Anastassiadou* , Geneviève Baziard-Mouysset, Marc Payard
  • *Laboratoire de Chimie Pharmaceutique, Faculté de Pharmacie, Université Paul Sabatier. 35, Chemin des Maraîchers, 31062 Toulouse Cedex 4, France; Fax (33)5 62 25 68 81; E-mail: chimphar@cict.fr
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Publication Date:
31 December 2000 (online)

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A new one-step method for the preparation of 2-aryl-1H-imidazoles 3, based on the DMSO dehydrogenation of 2-aryl-Δ2-imidazolines, is described. A comparative study between DMSO and 10% Pd/C, the best known catalyst employed in this transformation, has also been developed. Both protocols were carried out at 120°C for 48 hours.

oxidation - dehydrogenation - Δ2-imidazoline - 1H-imidazole - DMSO - Pd/C