[Cl:1][C:2]1[C:11]([C:12]2([C:15]#[N:16])[CH2:14][CH2:13]2)=[CH:10][CH:9]=[CH:8][C:3]=1[C:4]([O:6]C)=[O:5].CO.O.O.[OH-].[Li+]>O1CCCC1>[Cl:1][C:2]1[C:11]([C:12]2([C:15]#[N:16])[CH2:14][CH2:13]2)=[CH:10][CH:9]=[CH:8][C:3]=1[C:4]([OH:6])=[O:5]To a solution of methyl 2-chloro-3-(1-cyanocyclopropyl)benzoate (13.5 g, 57.3 mmol) in tetrahydrofuran (180 mL)/methanol (60 mL)/water (60 mL) was added lithium hydroxide monohydrate (3.62 g, 86.3 mmol), and the mixture was stirred at room temperature for 2 hr. The reaction mixture was concentrated under reduced pressure, and to the obtained residue was dropwise added 6N hydrochloric acid (20 mL). The precipitate was collected by filtration, and washed with water to give the title compound (11.4 g, 90%) as white crystals.
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