CS(C)=O.[OH:5][CH2:6][CH2:7][CH2:8][CH:9]1[CH2:14][CH2:13][N:12]([CH2:15][CH2:16][CH2:17][O:18][C:19]2[CH:26]=[CH:25][C:22]([C:23]#[N:24])=[CH:21][CH:20]=2)[CH2:11][CH2:10]1.[NH2:27][OH:28].CC(O)C>O>[OH:28][N:27]=[C:23]([NH2:24])[C:22]1[CH:21]=[CH:20][C:19]([O:18][CH2:17][CH2:16][CH2:15][N:12]2[CH2:11][CH2:10][CH:9]([CH2:8][CH2:7][CH2:6][OH:5])[CH2:14][CH2:13]2)=[CH:26][CH:25]=1To a dimethylsulfoxide (200 mL) solution of 18.7 g of 4-{3-[4-(3-hydroxypropyl)-1-piperidinyl]propoxy}benzonitrile was added 8.92 mL of a 50% hydroxylamine aqueous solution at room temperature, which was then stirred at the same temperature for 5 hours and 30 minutes. Thereto was added 8.92 mL of a 50% hydroxylamine aqueous solution at room temperature, which was stirred at the same temperature for 15 hours and 50 minutes. To the reaction mixture were added 2-propanol and water, which was then stirred at room temperature for one hour. The precipitate was collected by filtration and washed with water to provide 17.5 g of N′-hydroxy-4-{3-[4-(3-hydroxypropyl)-1-piperidinyl]propoxy}benzamidine as white solid form.
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