| 摘要 |
<p>A process for preparing long chain saturated or unsaturated oxygenated compounds. The process for the preparation of long-chain saturated or unsaturated oxygenated compounds having from 20 to 36 carbon atoms, selected from the group consisting of polycosanoic acids, their alkyl esters, polycosanols and corresponding compounds having an unsaturated hydrocarbon chain comprises the operation of reacting, in accordance with the Wittig or Peterson olefination reaction, a phosphorus ylide RP(Ar)3, wherein R is a saturated or unsaturated hydrocarbon chain containing one or more ethylenic and/or acetylenic unsaturations and Ar is aryl, or the corresponding α-silylcarbanion, respectively, with an n-alkanoic acid, formylated in the terminal position, or with its corresponding alkyl ester.</p> |
