Journal
TETRAHEDRON LETTERS
Volume 44, Issue 44, Pages 8077-8079Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2003.09.055
Keywords
hydroboration; alkenes; borohydride; catalysis
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In the presence of a catalytic amount of (BH3Me2S)-Me-., TiCl4 or Me3SiCl, LiBH4 or NaBH4 are capable of hydroborating alkenes by following the unusual order of decreasing reactivity: tetramethylethylene > 1-methylcyclohexene > cyclohexene; the key step of the catalytic cycle is the exchange reaction between LiBH4 and the mono- or dialkylboranes resulting from hydroboration of the more substituted alkenes with BH3. (C) 2003 Elsevier Ltd. All rights reserved.
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