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- W1997667305 abstract "1,1-Dimethyl-1-silacyclopentan-3-ols are synthetised by hydroboration—oxidation or epoxidation—reduction of the corresponding silacyclopent-3-enes. In acidic media, β-silacyclopentanols give ring opening reactions. Secondary sila-β-alcohols are rearranged by Raney nickel on warming to give 1-oxa-2-sila-cyclopentanes. Thermal dehydration of tertiary β-alcohols gives a mixture of cyclenic isomers from which α-silacyclopentanols can be prepared. Silacyclopentane-3,4-diols are obtainable from the acidic cleavage of the epoxidic ring of oxasilabicyclohexanes. Nous avons obtenu les diméthyl-1,1 silacyclopentanols-3 à partir des silacyclopentènes-3 correspondants soit par hydroboration—oxydation, soit par époxydation—réduction de la double liaison éthylénique intracyclique. Les β-silacyclopentanols ainsi préparés donnent lieu en milieu acide, à des réactions d'ouverture de cycle. Traités à chaud par le nickel de Ranay, les β-alcools secondaires siliciés se transposent en oxa-1 sila-2 cyclopentanes. La déshydratation thermique des β-alcools tertiaires conduit à un mélange d'isomères cycléniques, à partir duquel il est possible d'accéder aux α-silacyclopentanols. L'ouverture acide des oxasilabicyclohexanes conduit aux silacyclopentanediols-3,4." @default.
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- W1997667305 date "1971-07-01" @default.
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- W1997667305 title "α- et β-silacyclopentanols" @default.
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- W1997667305 doi "https://doi.org/10.1016/s0022-328x(00)82591-7" @default.
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