[F:1][C:2]1[CH:32]=[CH:31][C:5]([CH2:6][NH:7][C:8]([C:10]2[N:11]=[C:12]3[N:27]([CH:28]([CH3:30])[CH3:29])[CH2:26][CH2:25][N:13]3[C:14](=[O:24])[C:15]=2[O:16]CC2C=CC=CC=2)=[O:9])=[C:4]([S:33](=[O:38])(=[O:37])[N:34]([CH3:36])[CH3:35])[CH:3]=1>FC(F)(F)C(O)=O>[F:1][C:2]1[CH:32]=[CH:31][C:5]([CH2:6][NH:7][C:8]([C:10]2[N:11]=[C:12]3[N:27]([CH:28]([CH3:30])[CH3:29])[CH2:26][CH2:25][N:13]3[C:14](=[O:24])[C:15]=2[OH:16])=[O:9])=[C:4]([S:33](=[O:37])(=[O:38])[N:34]([CH3:36])[CH3:35])[CH:3]=1A solution of N-(4-fluoro-2-(N,N-dimethylsulfamoyl)benzyl)-6-benzyloxy-1-isopropyl-5-oxo-1,2,3,5-tetrahydroimidazo[1,2-a]pyrimidine-7-carboxamide (0.155 g, 0.28 mmol) in trifluoroacetic acid (10 ml) was stirred at 25° C. for 72 h. The solvent was then evaporated under reduced pressure and the residue was purified by preparative HPLC (column YMC Pack C-18, 5μ, 20×250 mm, elution gradient acetonitrile-water 0.1% trifluoroacetic acid) to give 0.105 g (81% yield) of the title amide as a white solid.
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