F[C:2]1[CH:7]=[CH:6][C:5]([S:8]([NH2:11])(=[O:10])=[O:9])=[CH:4][C:3]=1[C:12]([F:15])([F:14])[F:13].[O:16]1[CH2:21][CH2:20][CH:19]([CH2:22][NH2:23])[CH2:18][CH2:17]1.C(N(CC)C(C)C)(C)C>CS(C)=O.C(OCC)(=O)C>[O:16]1[CH2:21][CH2:20][CH:19]([CH2:22][NH:23][C:2]2[CH:7]=[CH:6][C:5]([S:8]([NH2:11])(=[O:10])=[O:9])=[CH:4][C:3]=2[C:12]([F:15])([F:14])[F:13])[CH2:18][CH2:17]1A mixture of 4-fluoro-3-(trifluoromethyl)benzenesulfonamide (1.056 g), (tetrahydro-2H-pyran-4-yl)methanamine (0.5 g) and N,N-diisopropylethylamine (1.68 g) in anhydrous dimethylsulfoxide (15 mL) solution was heated at 90° C. overnight. The reaction mixture was cooled to room temperature and diluted with ethyl acetate. The organic phase was washed with water, brine, dried over anhydrous sodium sulfate, filtered and concentrated to afford the title compound.
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