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首页> 外文期刊>Chemistry: A European journal >Acid Zeolites as Alcohol Racemization Catalysts:Screening and Application in Biphasic Dynamic Kinetic Resolution
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Acid Zeolites as Alcohol Racemization Catalysts:Screening and Application in Biphasic Dynamic Kinetic Resolution

机译：酸性沸石作为外消旋醇的催化剂：筛选及其在双相动力学拆分中的应用

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摘要

Acid zeolites were screened as heterogeneous catalysts for racemi-zation of benzylic alcohols.The most promising zeolites appeared to be H-Beta zeolites,for which the optimal reaction conditions were studied in further detail.The zeolite performance was compared to that of homogeneous acids and acid resins under similar reaction conditions.In a second part of the research,H-Beta zeolites were applied in dynamic kinetic resolution(DKR)of 1-phenylethanol,which was conducted by means of a two-phase approach and which resulted in yields smoothly crossing the 50% border up to 90%,with an enantiomeric excess of >99%.To explore the applicability of this biphasic methodology,several other substrates were examined in the standard racemization reaction and in the biphasic dynamic kinetic resolution.
机译：筛选了酸性沸石作为苯甲醇外消旋化的非均相催化剂，最有希望的沸石似乎是H-Beta沸石，并对其最佳反应条件进行了详细研究，并将其与均相酸和在第二部分的研究中，将H-Beta沸石通过两相方法应用于1-苯基乙醇的动态动力学拆分（DKR），将其平稳收率。越过50％边界达到90％，对映体过量> 99％。为探索这种双相方法的适用性，在标准外消旋反应和双相动态动力学拆分中研究了其他几种底物。

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