Potassium Carbonate → Acifluorfen-methyl

反応式

[Cl:1][C:2]1[CH:7]=[C:6]([C:8]([F:11])([F:10])[F:9])[CH:5]=[CH:4][C:3]=1[OH:12].C(=O)([O-])[O-].[K+].[K+].F[C:20]1[CH:21]=[CH:22][C:23]([N+:30]([O-:32])=[O:31])=[C:24]([CH:29]=1)[C:25]([O:27][CH3:28])=[O:26]>CS(C)=O>[Cl:1][C:2]1[CH:7]=[C:6]([C:8]([F:10])([F:11])[F:9])[CH:5]=[CH:4][C:3]=1[O:12][C:20]1[CH:21]=[CH:22][C:23]([N+:30]([O-:32])=[O:31])=[C:24]([CH:29]=1)[C:25]([O:27][CH3:28])=[O:26]

参加物

実験手順

To a 5-liter, 4-necked flask fitted with a stirrer, thermometer, addition funnel, reflux condenser and drying tube is added dimethyl sulfoxide (200 ml), 2-chloro-4-trifluoromethylphenol) (715 g, 3.64 mole), and anhydrous potassium carbonate (520 g, 3.72 moles). The reaction mixture is stirred at room temperature overnight under a nitrogen atmosphere. Then methyl 5-fluoro-2-nitrobenzoate (724 g, 3.64 moles) is added over a 1 hour period (slight exotherm to 31° C.). After stirring overnight at room temperature, the inorganic solids are removed by filtration and 1700 ml of dimethyl sulfoxide removed under vacuum (1 mm, pot temp. of 85° C., vapor temp. of -40° C.). The residue is diluted with a large volume of carbon tetrachloride and water washed. The organic layer is dried with anhydrous magnesium sulfate and the solvent removed under vacuum to afford 1142 g of methyl 5-(2-chloro-4-trifluoromethylphenoxy)-2-nitrobenzoate (84% yield). Anal. Calcd. for C15H9ClF3NO5 : C, 47.90; H, 2.42; Cl, 9.45; F, 15.20; N, 3.73. Found: C, 47.83; H, 2.47; Cl, 9.15; L F, 14.84; N, 3.69.