[N:1]1([C:6]([C:8]2[CH:17]=[CH:16][C:11]([C:12]([O:14]C)=[O:13])=[CH:10][CH:9]=2)=[O:7])[CH2:5][CH2:4][CH2:3][CH2:2]1.[OH-].[Na+].O.CO>O1CCCC1>[N:1]1([C:6]([C:8]2[CH:17]=[CH:16][C:11]([C:12]([OH:14])=[O:13])=[CH:10][CH:9]=2)=[O:7])[CH2:2][CH2:3][CH2:4][CH2:5]129.0 g (0.146 mol) of 4-chlorocarbonyl benzoic acid monomethyl ester, 14.2 g (200 mmol) of pyrrolidine and 21.0 g (208 mmol) of triethylamine were reacted in 350 ml of dichloromethane. After the treatment in an ordinary manner, methyl 4-(1-pyrrolidylcarbonyl)benzoate was obtained. 29.0 g of this ester compound was hydrolyzed with 12.0 g of sodium hydroxide in a mixed solvent comprising 70 ml of water, 70 ml of methanol and 70 ml of tetrahydrofuran. After the completion of the reaction, the solvent was distilled off. After the addition of 1 N hydrochloric acid followed by the treatment with dichloromethane as the extractant in an ordinary manner, the title compound was obtained.
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