2001 organo-silicon compounds

organo-silicon compoundsS 0060

09 - 151Stereoselective Synthesis of Silacyclohexanols by Silicon TetheredType II Ene Cyclization. — The preparation of vinyl silane precursorslike (I), (III), (IX) and (XIV) for intramolecular ene reactions is described.Their synthesis is achieved either by sequential organometallic substitutionof appropriate silyl halides or by ring opening of oxasilacyclopentanes withpropenyllithium. Treatment of this ene precursors with methylaluminumdichloride gives the corresponding silacyclohexanols in good yields and withhigh stereoselectivity. — (ROBERTSON, JEREMY; O’CONNOR, GARRY;SARDHARWALA, TSARINA; MIDDLETON, DONALD S.; Tetrahedron 56(2000) 42, 8309-8320; Dyson Perrins Lab., Dep. Chem., Univ. Oxford, OxfordOX1 3QY, UK; EN)

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