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    Process for the preparation of 2-Alkyl-Cyclopent-2-Enones
    121.
    发明公开
    Process for the preparation of 2-Alkyl-Cyclopent-2-Enones 失效
    Verfahren zur Herstellung von 2-烷基 - 环戊-2-烯酮。

    公开(公告)号：EP0194144A2

    公开(公告)日：1986-09-10

    申请号：EP86301568.1

    申请日：1986-03-05

    申请人： Montedison S.p.A.

    发明人： Dalcanale, Enrico

    IPC分类号： C07C45/59 ,  C07C49/597 ,  C07C221/00 ,  C07C255/31 ,  C07C69/738

    CPC分类号： C07D307/33 ,  C07C45/59 ,  C07C49/597 ,  C07C49/687 ,  C07C49/753 ,  C07C255/00 ,  C07D303/42 ,  C07D315/00

    摘要： The invention relates to a process for the preparation of 2-alkyl-cyclopent-2-enones of formula
    by the following steps. 1) An a-olefin of formula CH 2 =CH--CH 2 R is oxidized to the corresponding epoxide. 2) The epoxide is reacted with an alkylating agent of formula Na + (CH-(COOR") 2 ]- wherein R" is an ethyl, isopropyl or isobutyl radical, to obtain an α-carbalkoxy-γ-alkyl lactone. 3) The lactone is saponified to obtain the corresponding acid. 4) The acid is decarboxylated to obtain a γ-alkyl lactone of formula:
    5) The γ-alkyl lactone is reacted with a protic acid to thereby obtain, by cyclization, a 2-alkyl-cyclopent-2-enone of formula (I).

    摘要翻译： 本发明涉及通过以下步骤制备式... 的2-烷基 - 环戊-2-烯酮的方法。 1）将式CH 2 = CH-CH 2 R的α-烯烃氧化成相应的环氧化物。 2）将环氧化物与式Na + [CH（COOR sec）2]]和烷基化烷基化剂反应，其中R sec是乙基，异丙基或异丁基，得到α-碳烷氧基-γ-烷基内酯。 3）将内酯皂化，得到相应的酸。 4）将酸脱羧以得到下式的γ-烷基内酯：... 5）将γ-烷基内酯与质子酸反应，由此通过环化得到2-烷基 - 环戊-2-烯 式（I）的烯酮。

    SYNTHESIS OF SUBSTITUTED ENONES
    126.
    发明公开
    SYNTHESIS OF SUBSTITUTED ENONES 审中-公开

    公开(公告)号：EP3628658A1

    公开(公告)日：2020-04-01

    申请号：EP19199427.6

    申请日：2019-09-25

    申请人： Henkel AG & Co. KGaA

    发明人： SCHAEFER, Sascha ,  SCHMIDT, Nora ,  NEUHAUS, Svenja

    IPC分类号： C07C221/00 ,  C07C225/14 ,  C07D207/08

    摘要： The present invention is in the field of basic and fine chemical synthesis and washing or cleaning agents and relates to a method for preparing an enone compound of formula (I) by reacting a ketone compound of formula (II) with an amine compound of formula (III) in the presence of at least one oxidant. Furthermore, the invention refers to the enone compound of formula (I) obtained by the method according to the invention and to a washing or cleaning agent comprising the enone compound of formula (I) obtained by the method according to the invention. In addition, use of the enone compound of formula (I) as fine chemical, basic chemical, insect repellant, pharmaceutical compound, fragrance or pro-fragrance is part of the invention.