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

HRID 1764486Notes

Reaction equation

HRID 1764486 reaction equation
S(=O)(=O)(O)[OH:2].I[C:7]([F:19])([F:18])[C:8]([F:17])([F:16])[C:9]([F:15])([F:14])[C:10]([F:13])([F:12])I>>[F:12][C:10]1([F:13])[C:9]([F:15])([F:14])[C:8]([F:17])([F:16])[C:7]([F:19])([F:18])[O:2]1

Participants

3

Reactant 2

HCID 1118Sulfuric AcidHCID 78993Perfluoro-1,4-diiodobutane2×

Product 1

HCID 164733Furan, 2,2,3,3,4,4,5,5-octafluorotetrahydro-Yield 47%

Procedure

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.

Workup

  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

Sources & evidence

ORD record
ord-d58a674923b949d1949332fe62ded903
Source dataset
uspto-grants-1978_09
Patent number
US04116977

Reaction notes

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