Process for the preparation of alkylidenecyclopentanone derivatives
    2.
    发明申请
    Process for the preparation of alkylidenecyclopentanone derivatives 失效
    制备亚烷基环戊酮衍生物的方法

    公开(公告)号:US20050187299A1

    公开(公告)日:2005-08-25

    申请号:US11114538

    申请日:2005-04-26

    摘要: The present invention relates to the field of organic synthesis and more particularly to a new process for the preparation of a compound of formula (I), in the form of any one of its isomers or a mixture thereof, wherein, more preferably, G represents a C═O group, R1 represents a butyl group and R2 represents a methyl group. The process of the invention involves an 2-(1-hydroxyalkyl)-cyclopent-2-en-1-one derivative, as starting material, which can be then converted into a compound of formula (I) by a process comprising a thermal rearrangement. The 2-alkylidene-3-oxo-cyclopentylacetate derivative and the 2-(1-hydroxyalkyl)-cyclopent-2-en-1-one derivative are also an object of the invention.

    摘要翻译: 本发明涉及有机合成领域,更具体地说,涉及制备其异构体或其混合物中任一种形式的式(I)化合物的新方法,其中更优选G代表 CO基,R 1表示丁基,R 2表示甲基。 本发明的方法涉及作为起始原料的2-(1-羟基烷基) - 环戊-2-烯-1-酮衍生物,然后可通过包括热重排的方法转化为式(I)的化合物 。 2-亚烷基-3-氧代 - 环戊基乙酸酯衍生物和2-(1-羟基烷基) - 环戊-2-烯-1-酮衍生物也是本发明的目的。