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- W2000283344 abstract "L'hétérocyclisation par oxymercuration intramoléculaire des (tétrahydrofuryl-2)-1 pentène-4 -ols-1, érythro et thréo, est réalisés de manière stéréosélective par l'acétate mercurique. Le méthyl-2 tétrahydrofuryl-5 tétrahydrofuranne obtenu après démercuration par réduction contient plus de 80% de l'isomère trans. En revanche la cyclisation par le chlorure mercurique conduit, après réduction, à un mélange d'isomères cis et trans en quantités voisines. The intramolecular oxymercuration of the l-(2-tetrahydrofuryl)4-penten-1-ols (5) by merruric salts followed by reductive demercuration affords the 2-methyl-5-tetrahydrofuryltetrahydrofuran (9) as a mixture of cis and trans isomers in good yields. By using mercuric acetate, each isomier threo 5a and erythro 5b gives the trans isomer, 9d and 9b, respectively, as the major products. On the other hand, cyclizations carried out with mercuric chloride are not stereoselective." @default.
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- W2000283344 date "1981-05-01" @default.
- W2000283344 modified "2023-09-26" @default.
- W2000283344 title "Synthèse de polyéthers polycycliques.<b>1</b>Stéréosélectivité de l'hétérocyclisation d'alcools tétrahydrofurfuryliques<i>γ,δ</i>-éthyléniques par les sels mercuriques" @default.
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- W2000283344 doi "https://doi.org/10.1002/jhet.5570180326" @default.
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