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Synthesis of Symmetrical Organic Carbonates via Significantly Enhanced Alkylation of Metal Carbonates with Alkyl Halides/Sulfonates in Ionic Liquid
journal contribution
posted on 2005-12-23, 00:00 authored by Yogesh R. Jorapur, Dae Yoon ChiWe report a new phosgene-free method for the synthesis of symmetrical organic carbonates via
alkylation of metal carbonate with various alkyl halides and sulfonates in 1-n-butyl-3-methylimidazolium hexafluorophosphate, [bmim][PF6], as an ecofriendly reaction media. Alkylation of
metal carbonate in various ionic liquids with 1-bromo-3-phenylpropane (1a) as a model reactant
has thoroughly been investigated. Potassium and cesium carbonates appeared to be the most suitable
metal carbonate due to their high solubility in ionic liquids. Besides good to excellent yields, this
simple and convenient methodology is devoid of highly toxic and harmful chemicals such as phosgene
and carbon monoxide, which is an additional advantage.