4.8 Article

Reaction of Singlet Oxygen with Thioanisole in Ionic Liquids: a Solvent Induced Mechanistic Dichotomy

Journal

ORGANIC LETTERS
Volume 11, Issue 6, Pages 1413-1416

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/ol900140w

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Funding

  1. MIUR
  2. La Sapienza University of Rome
  3. University of Pisa
  4. University of Perugia

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A study of the reaction of thioanisole with singlet oxygen in pyrrolidinium- and imidazolium-based ionic liquids has been carried out. In these solvents, thioanisole shows a strongly enhanced reactivity with respect to molecular aprotic solvents, probably due to a stabilization of the persulfoxide intermediate in the ionic medium. Product isotope effects suggest a mechanistic change ongoing from pyrrolidinium to imidazolium solvents.

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