申请人:Kureha Chemical Industry Co., Ltd.
公开号:US05258404A1
公开(公告)日:1993-11-02
Disclosed is a 3-(unsubstituted or substituted benzyl)-1-alkyl-2-oxocyclopentane carboxylic acid alkyl ester derivative as represented by the general formula (I): ##STR1## where R.sup.1 and R.sup.2 are each a lower alkyl group; X is a halogen atom, a cyano group, an alkyl group, a haloalkyl group, a phenyl group or a nitro group; and m is 0 or an integer from 1 to 5 and when m is greater than 1 each X can be the same or different. Further, disclosed is a method for the preparation of the compound (I) by carrying out the benzylation, rearrangement, and alkylation from the 2-oxocyclopentane carboxylic acid alkyl ester derivative without isolation of any intermediate compound. In addition, a fungicide is provided in which the 3-(unsubstituted or substituted benzyl)-1-alkyl-2-oxocyclopentane carboxylic acid alkyl ester derivatives (I) is contained as an active ingredient. Furthermore, it can provide 2-(unsubstituted or substituted benzyl)-5-alkylcyclopentanone derivatives from the 3-(unsubstituted or substituted benzyl)-1-alkyl-2-oxocyclopentane carboxylic acid alkyl ester derivatives (I).
揭示了一种由通式(I)表示的3-(未取代或取代苄基)-1-烷基-2-氧代环戊烷羧酸烷基酯衍生物,其中R.sup.1和R.sup.2分别是较低的烷基基团;X是卤素原子、氰基、烷基、卤代烷基、苯基或硝基基团;m为0或1至5的整数,当m大于1时,每个X可以相同或不同。此外,还公开了一种制备化合物(I)的方法,通过从2-氧代环戊烷羧酸烷基酯衍生物进行苄基化、重排和烷基化,而无需分离任何中间化合物。此外,提供了一种杀真菌剂,其中包含3-(未取代或取代苄基)-1-烷基-2-氧代环戊烷羧酸烷基酯衍生物(I)作为活性成分。此外,它可以从3-(未取代或取代苄基)-1-烷基-2-氧代环戊烷羧酸烷基酯衍生物(I)中提供2-(未取代或取代苄基)-5-烷基环戊酮衍生物。