PRODUCTION OF 2,4-HEXADIENOIC ACID AND 1,3-PENTADIENE FROM 6-METHYL-5,6-DIHYDRO-2-PYRONE
    2.
    发明申请
    PRODUCTION OF 2,4-HEXADIENOIC ACID AND 1,3-PENTADIENE FROM 6-METHYL-5,6-DIHYDRO-2-PYRONE 有权
    从6-甲基-5,6-二氢-2-吡喃酮生产2,4-二十六烷酸和1,3-二戊烯

    公开(公告)号:US20120116119A1

    公开(公告)日:2012-05-10

    申请号:US12943433

    申请日:2010-11-10

    IPC分类号: C07C51/09 C07C45/60 C07C1/22

    摘要: Described is a method of making sorbic acid, pentadiene, or 3-penten-2-one. The method includes partially hydrogenating 4-hydroxy-6-methyl-2-pyrone (HMP) to yield 5,6-dihydro-4-hydroxy-6-methyl-2H-pyran-2-one (4-DHMMP). Then, if 3-penten-2-one is desired, thermally decomposing the 4-DHMMP to yield 3-penten-2-one. If sorbic acid or pentadiene are desired, the 4-DHMMP is hydrogenated to yield 4-hydroxy-6-methyltetrahydro-2-pyrone (4-HMTHP). The 4-HMTHP is then dehydrated by contacting it with a solid acid catalyst to yield parasorbic acid (PSA). The PSA can then be ring-opened by contacting it with a solid acid catalyst. The reaction conditions of the ring-opening reaction can be controlled to yield sorbic acid and/or pentadiene.

    摘要翻译: 描述了制备山梨酸,戊二烯或3-戊烯-2-酮的方法。 该方法包括部分氢化4-羟基-6-甲基-2-吡喃酮(HMP),得到5,6-二氢-4-羟基-6-甲基-2H-吡喃-2-酮(4-DHMMP)。 然后,如果需要3-戊烯-2-酮,则热分解4-DHMMP以得到3-戊烯-2-酮。 如果需要山梨酸或戊二烯,则将4-DHMMP氢化,得到4-羟基-6-甲基四氢-2-吡喃酮(4-HMTHP)。 然后通过使其与固体酸催化剂接触来脱水4-HMTHP以得到异烟酸(PSA)。 然后可以通过使其与固体酸催化剂接触来使PSA开环。 可以控制开环反应的反应条件以产生山梨酸和/或戊二烯。