A new diphenylphosphinite ionic liquid (IL-OPPh2) as reagent and solvent for highly selective bromination, thiocyanation or isothiocyanation of alcohols and trimethylsilyl and tetrahydropyranyl ethers |
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Authors: | Nasser Iranpoor Habib Firouzabadi |
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Institution: | Department of Chemistry, Shiraz University, Shiraz 71454, Iran |
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Abstract: | A new diphenylphosphinite ionic liquid (IL-OPPh2) is introduced. This ionic liquid is used as both a reagent and a solvent to convert alcohols and trimethylsilyl and tetrahydropyranyl (THP) ethers into their corresponding alkyl bromides, thiocyanates or isothiocyanates in the presence of Br2 and SCN− at 80 °C. In this ionic liquid, bromination and thiocyanation of alcohols occurs highly selectively in the presence of trimethylsilyl and THP-ethers and also between different classes of alcohols. The use of this ionic liquid allows easy separation of the desired products from the phosphinate by-product. |
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Keywords: | Triphenylphosphine Ionic liquid Alcohol Trimethylsilyl ether Tetrahydropyranyl ether Halogenation Thiocyanation |
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