Process for producing (4E)-5-chloro-2-isopropyl-4-pentenoate and optically active form thereof
    5.
    发明申请
    Process for producing (4E)-5-chloro-2-isopropyl-4-pentenoate and optically active form thereof 有权
    制备(4E)-5-氯-2-异丙基-4-戊烯酸酯及其光学活性形式的方法

    公开(公告)号:US20050228193A1

    公开(公告)日:2005-10-13

    申请号:US11147255

    申请日:2005-06-08

    摘要: The present invention provides processes for producing a (4E)-5-chloro-2-isopropyl-4-pentenoate and an optical isomer of the (4E)-5-chloro-2-isopropyl-4-pentenoate, namely a process for producing a (4E)-5-chloro-2-isopropyl-4-pentenoate represented by the following formula (4), which comprises reacting a compound represented by the following formula (2) in the presence of an aprotic solvent (II) with a base (II) and then with (1E)-1,3-dichloro-1-propene to give a compound represented by the following formula (3), and dealkoxycarbonylating either ester in the compound represented by the following formula (3), and a process for producing a (S)-(4E)-5-chloro-2-isopropyl-4-pentenoate represented by the following formula (5), which comprises optically resolving a (4E)-5-chloro-2-isopropyl-4-pentenoate represented by the formula (4) obtained by the above-mentioned process (wherein R is a lower alkyl group or an aralkyl group).

    摘要翻译: 本发明提供了(4E)-5-氯-2-异丙基-4-戊烯酸酯和(4E)-5-氯-2-异丙基-4-戊烯酸酯的旋光异构体的制备方法,即制备 由下式(4)表示的(4E)-5-氯-2-异丙基-4-戊烯酸酯,其包括使下式(2)表示的化合物在非质子溶剂(II)的存在下与 碱(II),然后与(1E)-1,3-二氯-1-丙烯反应,得到由下式(3)表示的化合物,和由下式(3)表示的化合物中的任一酯脱甲基羰基化,和 一种制备由下式(5)表示的(S) - (4E)-5-氯-2-异丙基-4-戊烯酸酯的方法,该方法包括光学拆分(4E)-5-氯-2-异丙基-4-戊烯酸 由上述方法(其中R是低级烷基或芳烷基)得到的式(4)表示的4-戊烯酸酯。

    Process for preparing methyl 4-oxo-5-tetradecynoate
    7.
    发明授权
    Process for preparing methyl 4-oxo-5-tetradecynoate 失效
    4-氧代-5-十四碳酸甲酯的制备方法

    公开(公告)号:US4808340A

    公开(公告)日:1989-02-28

    申请号:US136041

    申请日:1987-12-21

    CPC分类号: C07C69/606

    摘要: A process for preparing methyl 4-oxo-5-tetradecynoate useful as an intermediate for synthesizing (R,Z)-5-dec-1-enyl-oxacyclopentan-2-one, which comprises reacting monomethyl succinate with an alkyl chlorocarbonate in the presence of a base to form an acid anhydride and reacting the acid anhydride with a Grignard reagent of 1-decyne. Methyl 4-oxo-5-tetradecynoate can be prepared in high yields at high purities by this process.

    摘要翻译: 用作合成(R,Z)-5-癸-1-烯基 - 氧环戊烷-2-酮的中间体的4-氧代-5-十四碳酸甲酯的制备方法,其包括在存在下使琥珀酸甲酯与氯代碳酸烷基酯反应 的碱形成酸酐,并使酸酐与1-癸炔的格利雅试剂反应。 通过该方法可以高纯度的高产率制备4-氧代-5-十四碳酸甲酯。