Methanesulfonic Acid → 2,6-Difluoro-3-[3-(4-hydroxyphenyl)-[1,2,4]thiadiazol-5-ylmethoxy]-benzamide
反応式
C([O:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]2[N:19]=[C:18]([CH2:20][O:21][C:22]3[C:23]([F:32])=[C:24]([C:28]([F:31])=[CH:29][CH:30]=3)[C:25]([NH2:27])=[O:26])[S:17][N:16]=2)=[CH:11][CH:10]=1)C1C=CC=CC=1.CS(O)(=O)=O>C(Cl)Cl>[F:32][C:23]1[C:22]([O:21][CH2:20][C:18]2[S:17][N:16]=[C:15]([C:12]3[CH:13]=[CH:14][C:9]([OH:8])=[CH:10][CH:11]=3)[N:19]=2)=[CH:30][CH:29]=[C:28]([F:31])[C:24]=1[C:25]([NH2:27])=[O:26]参加物
4
実験手順
To a solution of 3-[3-(4-benzyloxy-phenyl)-[1,2,4]thiadiazol-5-ylmethoxy]-2,6-difluorobenzamide (0.020 g, 0.04 mmol) in DCM (5 ml) was added methanesulfonic acid (0.15 g, 1.50 mmol) drop wise. The resulting reaction mixture was stirred at room temperature for 1 h. After the completion of the reaction (TLC monitoring), the reaction mass was cooled to 0° C., quenched it with 5 ml of water and concentrated under vacuum. Added 25 ml water and extracted with ethyl acetate (3×20 ml). The combined organic layer was dried over Na2SO4, filtered and concentrated under vacuum. The crude residue was purified by ether and DCM washes to get the desired product (0.004 g, 25%).