期刊
TETRAHEDRON LETTERS
卷 47, 期 31, 页码 5531-5534出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2006.05.145
关键词
triphenylphosphine; ionic liquid; alcohol; trimethylsilyl ether; tetrahydropyranyl ether; halogenation; thiocyanation
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 Br-2 and SCN- at 80 degrees 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. (c) 2006 Published by Elsevier Ltd.
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