[OH:1][C:2]1[CH:11]=[CH:10][C:5]2[C:6](=[O:9])[CH2:7][O:8][C:4]=2[C:3]=1[CH2:12][N:13]1[CH2:18][CH2:17][O:16][CH2:15][CH2:14]1.[NH:19]1[C:27]2[C:22](=[CH:23][CH:24]=[CH:25][CH:26]=2)[C:21]([CH:28]=O)=[N:20]1.N1CCCCC1>CO>[NH:19]1[C:27]2[C:22](=[CH:23][CH:24]=[CH:25][CH:26]=2)[C:21](/[CH:28]=[C:7]2\[O:8][C:4]3[C:3]([CH2:12][N:13]4[CH2:18][CH2:17][O:16][CH2:15][CH2:14]4)=[C:2]([OH:1])[CH:11]=[CH:10][C:5]=3[C:6]\2=[O:9])=[N:20]1A solution of 6-hydroxy-7-(morpholinomethyl)benzofuran-3(2H)-one (0.125 g, 0.500 mmol) in methanol (2 mL) was added with 1H-indazole-3-carbaldehyde (0.0731 g, 0.500 mmol), and piperidine (0.00426 g, 0.0500 mmol) at room temperature, and the mixture was stirred at 60° C. for 2 hours. The reaction mixture was cooled to room temperature, and then the precipitated solid was collected by filtration to obtain (Z)-2-[(1H-indazol-3-yl)methylene]-6-hydroxy-7-(morpholinomethyl)benzofuran-3(2H)-one (0.119 g, 63%).
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