[H-].[Na+].[CH3:3][CH:4]([CH3:19])[C@@H:5]([NH:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]([F:18])([F:17])[F:16])=[CH:11][CH:10]=1)[CH2:6][OH:7].[CH2:20](Br)[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1>CN(C)C=O>[CH2:20]([O:7][CH2:6][C@H:5]([NH:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]([F:16])([F:17])[F:18])=[CH:11][CH:10]=1)[CH:4]([CH3:19])[CH3:3])[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1Sodium hydride (10 mg) and (2R)-3-methyl-2-{[4-(trifluoromethyl)phenyl]amino}butan-1-ol (30 mg), which is the compound obtained in Step 1 of Example 2, were dissolved in dimethylformamide (1 mL), and then benzyl bromide (0.052 mL) was added. The mixture was stirred at 50° C. for 3 hrs, and the title compound (37.5 mg) was obtained by purification step A.
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