[CH3:1][O:2][C:3]1[CH:26]=[CH:25][C:6]([CH2:7][N:8]2[CH:12]=[C:11]([C:13]3[N:14]=[C:15]([NH:18][C:19]4[CH:24]=[CH:23][CH:22]=[CH:21][N:20]=4)[S:16][CH:17]=3)[CH:10]=[N:9]2)=[CH:5][CH:4]=1.[Br:27]N1C(=O)CCC1=O>CN(C=O)C.C([O-])([O-])=O.[Na+].[Na+].O>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]([CH2:7][N:8]2[CH:12]=[C:11]([C:13]3[N:14]=[C:15]([NH:18][C:19]4[CH:24]=[CH:23][CH:22]=[CH:21][N:20]=4)[S:16][C:17]=3[Br:27])[CH:10]=[N:9]2)=[CH:25][CH:26]=1According to Scheme 5 Step 1: A solution of N-(4-(1-(4-methoxybenzyl)-1H-pyrazol-4-yl)thiazol-2-yl)pyridin-2-amine (4.20 mmol, 1.53 g) and N-bromosuccinimide (4.40 mmol, 782 mg) in DMF (76 mL) was stirred for 1.5 hour at 50° C. The reaction mixture was diluted with a saturated solution of Na2CO3 and water. The precipitate formed was recovered and washed with DCM. The aqueous phase was extracted with DCM and the organic phase was washed. The organic phase was dried over MgSO4, was filtered and was concentrated to yield with the addition of the precipitate N-(4-(1-(4-methoxybenzyl)-1H-pyrazol-4-yl)-5-bromothiazol-2-yl)pyridin-2-amine (4.02 mmol, 1.78 g, 96%) as a beige solid.
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