反应详情

A solution of 4-acetoxybenzoyl chloride (4.96 g) in dry dichloromethane (20 ml) was added dropwise over 15 minutes to a stirred solution of pentafluorothiophenol (5.00 g), pyridine (2.1 ml) and 4-N,N-dimethylaminopyridine (50 mg) in dry dichloromethane (75 ml), the mixture being maintained close to 5° C. by immersion in an ice-bath. The reactants were allowed to reach room temperature overnight and the organic solution was washed successively with aqueous 2M hydrochloric acid, a saturated sodium bicarbonate solution and water. Evaporation of the solution, which had been dried over magnesium sulphate, afforded the desired thioester (8.79 g).

1. temperaturethe mixture being maintained
2. customclose to 5° C. by immersion in an ice-bath
3. washthe organic solution was washed successively with aqueous 2M hydrochloric acid
4. customEvaporation of the solution, which
5. dry with materialhad been dried over magnesium sulphate