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- W2067178417 abstract "Diels-Alder reactions of conjugated linoleic acid ethyl ester (1) with different quinones and with a variety of α/βunsaturated aldehydes and ketones are described in this paper. Using Sc(OTf)3 or Cu(OTf)2 as catalysts the reactions can be carried out at 25—40 °C with good yields. For the first time in oleochemistry it is possible to prepare Diels-Alder cycloadditions with catalyst concentrations of 10 mol-% instead of stoichiometric amounts of Lewis acids. Furthermore, the reaction time was partly shortened drastically. The catalyst Sc(OTf)3 can be removed by a simple extraction of the organic layer with water. After evaporation of the aqueous phase to dryness the catalyst can be reused without loss of yield." @default.
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- W2067178417 date "2000-05-01" @default.
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- W2067178417 title "Transition-metal trifluoromethane-sulphonates-recyclable catalysts for the synthesis of branched fatty derivatives byDiels-Alder reactions at unsaturated fatty esters" @default.
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- W2067178417 doi "https://doi.org/10.1002/(sici)1438-9312(200005)102:5<342::aid-ejlt342>3.0.co;2-j" @default.
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