Water → 1-(2,2-Dichloro-1,1-difluoroethoxy)-4-(4-(methylsulfonyl)phenoxy)benzene

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Reaction Steps

To a solution of 5.29 g (0.0200 mole) of 4-(4-(methylsulfonyl)phenoxy)phenol (Example 21) in 100 ml of acetonitrile was added 0.80 g (0.0200 mole) of NaOH. The mixture was stirred at room temperature for 1 hr and then cooled to 3° C. in an ice bath. To the cold slurry was slowly added 4.0 g (0.0300 mole) of 1,1-difluoro-2,2-dichloroethylene dissolved in 15 ml of acetonitrile and the reaction mixture stirred at 3°-5° C. for 3 hrs. To the cold mixture 150 ml of water was added which resulted in the product precipitating as an oil. The product was extracted from the mixture with CH2Cl2. The organic layer was washed with water, dried (Na2SO4) and solvent removed in vacuo, which gave 7.1 g (89.4% yield) of product. Purification was accomplished by column chromatography using silica gel as the support and chloroform as the eluent, which afforded purified 1 -(2,2-dichloro-1,1-difluoroethoxy)-4-(4-(methylsulfonyl)phenoxy)benzene, mp 67°-70° C.

Provenance & Evidence