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    • 38. 发明申请
    • Processes for Producing Levosandal and Levosandol
    • 产生左旋糖和左旋糖酐的方法
    • US20100312018A1
    • 2010-12-09
    • US12753279
    • 2010-04-02
    • Avelino Corma CanosSara Iborra ChornetAlexandra Velty
    • Avelino Corma CanosSara Iborra ChornetAlexandra Velty
    • C07C45/74C07C29/159
    • C07C29/14C07C45/74C07C2601/10C07C33/12C07C47/225
    • 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).
    • 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)。