[C:1]([NH:4][C:5]1[CH:10]=[C:9]([C:11]2[O:12][C:13]([C:17]([NH2:19])=O)=[C:14]([I:16])[N:15]=2)[C:8]([CH3:20])=[CH:7][N:6]=1)(=[O:3])[CH3:2].C[N:22]([CH:24](OC)OC)C.O.[NH2:30]N>C1(C)C=CC=CC=1.O>[I:16][C:14]1[N:15]=[C:11]([C:9]2[C:8]([CH3:20])=[CH:7][N:6]=[C:5]([NH:4][C:1](=[O:3])[CH3:2])[CH:10]=2)[O:12][C:13]=1[C:17]1[N:22]=[CH:24][NH:30][N:19]=1To a slurry of 2-(2-acetamido-5-methylpyridin-4-yl)-4-iodo-1,3-oxazole-5-carboxamide (12.0 g, 31.0 mmol) in toluene (240 mL) was added DMF-DMA (24.0 mL, 187 mmol). The reaction mixture was allowed to stir at 90° C. for 5 h and then concentrated. The residue was suspended in AcOH (120 mL) and hydrazine hydrate (4.8 mL, 155 mmol) was added slowly. The reaction mixture was allowed to stir at rt overnight and then diluted with water. The slurry was filtered and the solid was collected, washed with water, and dried to give N-{4-[4-iodo-5-(1H-1,2,4-triazol-3-yl)-1,3-oxazol-2-yl]-5-methylpyridin-2-yl}acetamide (12.5 g, 95%).
読み込み中…
