[OH:1][C:2]1[CH:7]=[CH:6][N:5]=[CH:4][CH:3]=1.C(=O)([O-])[O-].Cl[CH2:13][C:14]([O:16][CH:17]([C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)=[O:15].C(OCC)(=O)C>CN(C)C=O>[CH:17]([O:16][C:14]([CH2:13][N:5]1[CH:6]=[CH:7][C:2](=[O:1])[CH:3]=[CH:4]1)=[O:15])([C:24]1[CH:25]=[CH:26][CH:27]=[CH:28][CH:29]=1)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=14 g (42.06 mmol) of 4-hydroxypyridine was dissolved in 80 ml of N,N-dimethylformamide, and 8.7 g (62.92 mmol) of pottasium carbonate and 16.45 g (63 mmol) of benzhydryl α-chloroacetate were added thereto. After stirring for 4 hours at 60° C., 200 ml of ethyl acetate was added to the reaction solution, and washed with water and a saturated sodium chloride aqueous solution followed by drying over anhydrous sodium sulfate and treating with active carbon. The solvent was distilled off under reduced pressure, and the crystal residue was washed with ether to obtain 9.8 g (yield: 73%) of 1-benzhydryloxycarbonylmethyl-4-pyridone.
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