Method for the Synthesis of Cyclic Acetals by the Reactive Extraction of a Polyol in a Concentrated Solution
    2.
    发明申请
    Method for the Synthesis of Cyclic Acetals by the Reactive Extraction of a Polyol in a Concentrated Solution 审中-公开
    通过多元醇在浓缩溶液中反应萃取合成环缩醛的方法

    公开(公告)号:US20100099894A1

    公开(公告)日:2010-04-22

    申请号:US12445030

    申请日:2007-10-08

    IPC分类号: C07D319/06 C07D317/10

    CPC分类号: C07D317/20 C07D319/06

    摘要: A method for the synthesis of cyclic acetals comprises reacting at least one carbonyl-function compound selected from aldehydes, ketones, and/or linear acetals, on a polyol in a concentrated aqueous solution exceeding 20 wt % in a reactor containing an acidic catalyst. The carbonyl-function compound is selected so that the cyclic acetal obtained has a water solubility lower than 20000 mg/kg. During the catalytic reaction for the cyclic acetal synthesis, at least one portion of the organic phase containing the cyclic acetal is separated. The acidic catalysis is either homogeneous when using a water-soluble strong acid, or heterogeneous when using a solid acid such as a resin, a zeolite, or any appropriately acidified solid. The extractive reaction method can be used for obtaining high conversions and selectivity.

    摘要翻译: 合成环状缩醛的方法包括在含有酸性催化剂的反应器中,使至少一种选自醛,酮和/或直链缩醛的羰基官能化合物在多元醇上浓缩超过20重量%的浓缩水溶液中。 选择羰基官能化合物,使得得到的环状缩醛的水溶解度低于20000mg / kg。 在环缩醛合成的催化反应期间,分离含有环缩醛的至少一部分有机相。 当使用水溶性强酸时,酸性催化剂是均匀的,或当使用固体酸如树脂,沸石或任何适当酸化的固体时是非均相的。 萃取反应方法可用于获得高转化率和选择性。

    Processes for Producing Levosandal and Levosandol
    3.
    发明申请
    Processes for Producing Levosandal and Levosandol 审中-公开
    产生左旋糖和左旋糖酐的方法

    公开(公告)号:US20100312018A1

    公开(公告)日:2010-12-09

    申请号:US12753279

    申请日:2010-04-02

    IPC分类号: C07C45/74 C07C29/159

    摘要: The present invention relates to processes for producing 2-ethyl-4-(2,2,3-trimethyl-3-cyclopenten-1-yl)-2-butenal and 2-ethyl-4-(2,2,3-trimethyl-3-cyclopenten-1-yl)-2-buten-1-ol using heterogeneous bifunctional catalysts with a good yield. There is provided a process for producing 2-ethyl-4-(2,2,3-trimethyl-3-cyclopenten-1-yl)-2-butenal by the cross-aldol condensation between campholenic aldehyde and butanal using bifunctional heterogeneous catalysts in the presence of controlled amounts of an aliphatic alcohol; and a process for producing 2-ethyl-4-(2,2,3-trimethyl-3-cyclopenten-1-yl)-2-buten-1-ol useful as perfume, starting from 2-ethyl-4-(2,2,3-trimethyl-3-cyclopenten-1-yl)-2-butenal through a MPV reduction using an acid-base bifunctional heterogeneous catalyst. Both process can be coupled in a cascade process which involves the cross-aldol condensation between campholenic aldehyde and butanal followed by the Meerwein-Ponndorf-Verley (MPV) reduction in the presence of a secondary alcohol using the same heterogeneous bifunctional catalyst for obtaining (2-ethyl-4-(2,2,3-trimethyl-3-cyclopenten-1-yl)-2-buten-1-ol).

    摘要翻译: 本发明涉及2-乙基-4-(2,2,3-三甲基-3-环戊烯-1-基)-2-丁烯醛和2-乙基-4-(2,2,3-三甲基 -3-环戊烯-1-基)-2-丁烯-1-醇,使用异构双官能催化剂,产率很高。 提供了一种通过使用双功能非均相催化剂在camp醛和丁醛之间的交换醛醇缩合产生2-乙基-4-(2,2,3-三甲基-3-环戊烯-1-基)-2-丁烯醛的方法 存在受控量的脂族醇; 和用作香料的2-乙基-4-(2,2,3-三甲基-3-环戊烯-1-基)-2-丁烯-1-醇的制备方法,由2-乙基-4-(2 ,2,3-三甲基-3-环戊烯-1-基)-2-丁烯醛,通过使用酸碱双功能多相催化剂的MPV还原。 这两种方法可以在级联方法中偶合,其涉及在醛醇和丁醛之间的交叉醛醇缩合,随后在仲醇存在下使用相同的异构双功能催化剂还原Meerwein-Ponndorf-Verley(MPV)以获得(2 - 乙基-4-(2,2,3-三甲基-3-环戊烯-1-基)-2-丁烯-1-醇)。