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200517.fm Page 59 Friday, March 18, 2005 2:52 PM
2005
Hydroboration
O 0277
Alkene-Pinacolborane Hydroborations Catalyzed by Lanthanum
— The lanthanum complex is found to be an efficient
17- 056 Tris[bis(trimethylsilyl)amide].
catalyst for the hydroboration of acyclic and cyclic alkenes with pinacolborane. The
resulting pinacolates are oxidized to give the corresponding alcohols. Except for
indene, the alkenes exhibit a pronounced disposition to anti-Markovnikov hydroboration (90-99% regioselectivity). — (HORINO, Y.; LIVINGHOUSE*, T.; STAN, M.;
Synlett 2004, 14, 2639-2641; Dep. Chem., Mont. State Univ., Bozeman, MT 59717,
USA; Eng.) — Klein
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