Photochemical Schiemann reaction in ionic liquids

Abstract:

Photochemical Schiemann reactions of imidazole derivatives 1 and 4 were carried out in 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid [bmim][BF4] as solvent. The effects of temperature, co-solvent and wavelength on the rate of the reaction and product yield were examined. The use of ionic liquid increases the yield of the photochemical fluorodediazoniation reaction of 2 at 0 °C. Careful temperature control is necessary to minimize the photodecomposition of the ionic liquid in order to increase the yield of product. © 2007 Elsevier B.V. All rights reserved.

Año de publicación:

2007

Keywords:

• Schiemann reaction
• Imidazole
• Photochemistry
• Ionic liquid

Fuente:

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