反应详情

Into a four necked flask equipped with a thermometer, a reflux condenser and stirrer, 310 g (2.3 moles as SO3) of fuming sulfuric acid containing 60% of SO3 and 105 g (0.23 mole) of 1,4-diiodoperfluorobutane of the formula I(CF2)4I were charged and heated. The reaction was conducted while maintaining the reaction temperature of 60° to 70° C. The collection and the separation of the reaction product was conducted in accordance with the process of Example 4. As a result, 23 g (47% yield) of perfluorotetrahydrofuran were obtained as a fraction having a boiling point of 1° C., and perfluoro- γ-butyrolactone (10% yield) and perfluorosuccinic difluoride (5% yield) were obtained as another fraction.

1. additionwere charged
2. temperatureheated
3. temperaturewhile maintaining the reaction temperature of 60° to 70° C
4. customThe collection
5. customthe separation of the reaction product