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

HRID 1764487Notes

Reaction equation

HRID 1764487 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 62%

Conditions

Temperature
85 °C

Procedure

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.

Workup

  1. additionwere charged
  2. temperaturewhile maintaining the temperature in the reactor at 80° to 90° C
  3. customThe collection
  4. customthe separation of the product

Sources & evidence

ORD record
ord-258125fdc9cd42d598198b78a5b8f694
Source dataset
uspto-grants-1978_09
Patent number
US04116977

Reaction notes

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