C(O)C.Cl.[Cl:5][C:6]1[CH:22]=[CH:21][C:9]([O:10][C:11]2[CH:16]=[C:15]([CH3:17])[C:14]([N+:18]([O-])=O)=[CH:13][N:12]=2)=[CH:8][C:7]=1[C:23]([F:26])([F:25])[F:24]>[Fe].O>[Cl:5][C:6]1[CH:22]=[CH:21][C:9]([O:10][C:11]2[N:12]=[CH:13][C:14]([NH2:18])=[C:15]([CH3:17])[CH:16]=2)=[CH:8][C:7]=1[C:23]([F:26])([F:24])[F:25]A 100 ml two-necked round-bottomed flask equipped with a KPG-stirrer, a thermometer and a reflux condenser is charged with ethanol (50 ml), water (5 ml), iron (1.29 g) and hydrochloric acid 37% (0.2 ml). The reaction mixture is heated at 50° C. 2-(4-chloro-3-trifluoromethyl-phenoxy)-4-methyl-5-nitro-pyridine (2.4 g) is added portionwise. The mixture is heated at reflux for 1 hour. After cooling the mixture to 50° C. is filtered through celite. The filtrate is poured into water (100 ml) and extracted with ethylacetate (2×50 ml). The combined organic layers are washed with brine (100 ml), dried over sodium sulfate, filtered and the solvent is removed in vacuo. Purification by flash chromatography over silica gel with hexane/ethyl acetate 1:1 (v:v) gives 1.90 g of the compound as a brownish solid (MP: 105-107° C.).
불러오는 중…
