A compound represented by the following formula (12) useful as an intermediate for production of drug or agricultural chemical:
(wherein R21 to R25 are each independently a hydrogen atom, a hydroxyl group, a halogen atom, an alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 4 carbon atoms, a perfluoroalkyl group of 1 to 4 carbon atoms, a cyano group, a nitro group, an amino group, a carboxyl group, a thiol group, an alkylthio group of 1 to 4 carbon atoms or a carbamoyl group) can be produced by reacting a compound represented by the formula (13):
(wherein R21 to R25 have the same definitions as given above) with 1,1-cyclopropanedicarboxylic acid. The compound of the formula (12) is useful as a raw material for production of a pyrrolidinone compound useful as an active ingredient of drug.
以下公式(12)表示的化合物可作为制药品或农药的中间体:(其中R21至R25分别独立地是氢原子、羟基、卤原子、1至4个碳原子的烷基、1至4个碳原子的烷氧基、1至4个碳原子的
全氟烷基、
氰基、硝基、
氨基、羧基、
硫醇基、1至4个碳原子的烷
硫基或羰基)。可通过将以下公式(13)表示的化合物(其中R21至R25的定义与上述相同)与1,1-
环丙烷二
羧酸反应来制备公式(12)表示的化合物。公式(12)的化合物可作为制药品活性成分
吡咯烷酮化合物的原料。