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Heteropoly acid catalysts for the synthesis of fragrance compounds from bio-renewables: acetylation of nopol and terpenic alcohols

机译:用于合成生物可再生能源的香料化合物的杂多酸催化剂:Nopol和Terpenic醇的乙酰化

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摘要

The cesium salt of tungstophosphoric heteropoly acid, Cs _(2.5) H _(0.5) PW _(12) O _(40) , is an active and environmentally friendly heterogeneous catalyst for the liquid-phase acetylation of nopol and several biomass-derived terpenic alcohols ( i.e. , α-terpineol, nerol, geraniol, linalool, menthol, isoborneol, perillyl alcohol, carveol, isopulegol, carvacrol and nerolidol) with acetic anhydride. The resulting flavor and fragrance acetic esters, which are widely used in perfumery, household and food products, are obtained in good to excellent yields. The reactions occur at room temperature with low catalyst loadings without substantial catalyst leaching and can be performed with stoichiometric amounts of an acetylating agent in solvent free systems.
机译:钨磷杂核酸的铯盐,Cs _(2.5)H _(0.5)Pw _(12)O _(12)O _(40),是Nopol的液相乙酰化和几种生物质衍生的活性和环保的非均相催化剂萜烯醇(即α-萜品醇,甘醇,甘醇,丙二醇,LILLOOL,薄荷醇,异烟醇,PLILLYL,CARVEL,异孔,Carvacrol和Nerolidol)用乙酸酐。得到的味道和香味乙型酯,这些乙型酯类广泛用于香料,家庭和食品,良好地获得优异的产量。在室温下发生反应,在没有大量催化剂浸出的低催化剂载量,并且可以用化学计量的溶剂系统中的乙酰化剂进行。

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