C([O:8][C:9]1[C:15]([F:16])=[C:14]([O:17][C:18]2[CH:19]=[N:20][C:21]([S:24]([CH3:27])(=[O:26])=[O:25])=[CH:22][CH:23]=2)[CH:13]=[CH:12][C:10]=1[NH2:11])C1C=CC=CC=1.O1CCCC1>[Pd].CO>[NH2:11][C:10]1[C:9]([OH:8])=[C:15]([F:16])[C:14]([O:17][C:18]2[CH:19]=[N:20][C:21]([S:24]([CH3:27])(=[O:26])=[O:25])=[CH:22][CH:23]=2)=[CH:13][CH:12]=1A mixture of 2-(benzyloxy)-3-fluoro-4-{[6-(methylsulfonyl)pyridin-3-yl]oxy}aniline (5.5 g), 10% palladium on carbon (containing 50% water, 1.6 g), tetrahydrofuran (100 mL) and methanol (80 mL) was hydrogenated at room temperature for 20 h under balloon pressure. The catalyst was removed by filtration and washed with tetrahydrofuran-methanol. The combined filtrate and washings were concentrated in vacuo and the residue was dissolved in ethyl acetate. The solution was concentrated in vacuo to give the title compound (4.2 g, 100%) as a light brown amorphous solid. MS 299 (MH+).
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