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2005
Halogenation
O 0235
Direct Halogenation of Alcohols and Their Derivatives with tert-Butyl Halides in
Ionic Liquid [pmIm]Br under Sonication Conditions — A Novel, Efficient and
24- 053 the
Green Methodology. — Direct halogenation of primary and secondary alcohols is
smoothly achieved with tert-butyl halides under sonication or, in the case of tert-butyl
chloride, under heating in the ionic liquid N-pentyl-N'-methylimidazolium bromide.
Tertiary alcohols remain unchanged under the reaction conditions applied. O-Protected
ethers like (VI) and (VII) also directly undergo the halogenation reaction. —
(RANU*, B. C.; JANA, R.; Eur. J. Org. Chem. 2005, 4, 755-758; Dep. Org. Chem.,
Indian Assoc. Cultiv. Sci., Jadavpur, Calcutta 700 032, India; Eng.) — Mischke
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