[CH3:1]N(C=O)C.[Br:6][C:7]1[CH:8]=[C:9]([NH:13][C:14](=[O:16])[CH3:15])[CH:10]=[CH:11][CH:12]=1.[H-].[Na+].CI>O>[Br:6][C:7]1[CH:8]=[C:9]([N:13]([CH3:1])[C:14](=[O:16])[CH3:15])[CH:10]=[CH:11][CH:12]=1To a DMF solution (15 ml) of N-(3-bromo-phenyl)-acetamide (1.19 g) obtained in Step A, 60% oily sodium hydride (279 mg) was added, followed by stirring at room temperature for 10 minutes. To this, methyl iodide (434 μl) was added, followed by stirring at room temperature for 21 hours. To this, water (30 ml) was added, followed by extraction with ethyl acetate (30 ml×2), and the organic layer was dried over sodium sulfate. The sodium sulfate was filtered off, followed by purification by silica gel column chromatography (dichloromethane/methanol=200/1), to obtain the desired compound (1.20 g, 94%).
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