• pt-based chiral organotin modified heterogeneous catalysts for the enantioselective hydrogenation of 3,4-hexanedione

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 984
    • تعداد پرسش و پاسخ ها: 0
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     in this paper we have studied the liquid-phase enantioselective hydrogenation of 3,4-hexanedione using pt-based catalysts, modified with chiral organotin compounds derived from the (−)-menthyl group: (−)-pt-mensnbu3 and (−)-men3sn-sn-(−)-men3. the organotin chiral modifiers were carefully synthesized and characterized in order to obtain optically pure compounds. the catalysts were prepared through a controlled surface reaction between the supported transition metal and the organometallic compound, using techniques derived from surface organometallic chemistry on metals (somc/m). the organobimetallic catalytic systems were found to be active and enantioselective in the hydrogenation of 3,4-hexanedione, yielding an enantiomeric excess of 25–27% for 4-hydroxy-3-hexanone.

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