[F:1][C:2]1[C:7]([F:8])=[CH:6][CH:5]=[C:4]([F:9])[C:3]=1[CH2:10][CH2:11][OH:12].[C:13]1([CH3:23])[CH:18]=[CH:17][C:16]([S:19](Cl)(=[O:21])=[O:20])=[CH:15][CH:14]=1.C(N(CC)CC)C.O>C(Cl)Cl>[C:13]1([CH3:23])[CH:18]=[CH:17][C:16]([S:19]([O:12][CH2:11][CH2:10][C:3]2[C:4]([F:9])=[CH:5][CH:6]=[C:7]([F:8])[C:2]=2[F:1])(=[O:21])=[O:20])=[CH:15][CH:14]=1
To a solution of 2-(2,3,6-trifluorophenyl)ethyl alcohol (1.5 g) in methylene chloride (10 ml) are added with stirring p-toluenesulfonyl chloride (2.2 g) and triethylamine (2.0 ml), and the mixture is stirred at room temperature for 5 hours. The reaction mixture is poured into water and is extracted with diethyl ether. The ether layer is washed with aqueous saturated sodium hydrogen carbonate and aqueous saturated sodium chloride and dried over magnesium sulfate and then concentrated under reduced pressure. The resulting residue is purified by silica gel column chromatography (solvent, methylene chloride) and recrystallized from diethyl ether-n-hexane to give 1-[2-(p-toluenesulfonyloxy)ethyl]-2,3,6-trifluorobenzene (3.4 g), as colorless prisms, m.p. 73°-74° C.
Loading…
