| 摘要 |
A process for the preparation of cafestol from kahweol wherein the kahweol is hydrogenated in the presence of a partially deactivated palladium catalyst on a calcium carbonate or active carbon support conditioned by lead as well as a process for preparing a mixture of cafestol and kahweol wherein coffee oil is treated with anhydrous methanol in the presence of a basic catalyst, the reaction medium is diluted with a substantially water-insoluble solvent which dissolves the formed methyl esters and then extracted with aqueous methanol, the aqueous methanol phase then being separated and then further extracted with a low-boiling chlorinated hydrocarbon which is then separated from the aqueous methanol phase and evaporated to give the mixture of cafestol and kahweol.
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