Sulfuric Acid → Furan, 2,2,3,3,4,4,5,5-octafluorotetrahydro-

Participants

Reaction Conditions

Reaction Steps

Into a four necked flask equipped with a thermometer, a reflux condenser, a dropping funnel and a stirrer, 190 g (0.7 mole as SO3) of fuming sulfuric acid containing 30% of SO3 were charged and were heated at 85° C. and then 100 g (0.22 mole) of 1,4-diiodoperfluorobutane having the formula I(CF2)4I were added dropwise to the flask. The reaction was conducted while maintaining the temperature in the reactor at 80° to 90° C. The collection and the separation of the product were conducted in accordance with the process of Example 4. As a result, the conversion was 52% and perfluorotetrahydrofuran (62% yield) and perfluoro- γ-butyrolactone (7% yield) were obtained based on the starting material.

Provenance & Evidence