申请人:Chapuis Christian
公开号:US20050187299A1
公开(公告)日:2005-08-25
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, R
1
represents a butyl group and R
2
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.
本发明涉及有机合成领域,更特别地涉及一种制备式(I)化合物的新工艺,其形式为其任何一个异构体或其混合物,其中,更优选地,G代表C═O基团,R1代表丁基基团,R2代表甲基基团。本发明的工艺涉及以2-(1-羟基烷基)-环戊-2-烯-1-酮衍生物为起始材料,该起始材料可以通过包括热重排的过程转化为式(I)化合物。2-烷基亚甲基-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对象。