Process for producing octafluoro[2,2]paracyclophane
AssigneeCentral Glass Company, Limited
InventorsKenji Uneyama, Hideki Amii
Life of this patent
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Abstract
A process for producing an octafluoro[2,2]paracyclophane includes the steps of (a) reacting 1,4-bis(trifluoromethyl)benzene with a halogenated silane represented by the general formula (1), in the presence of a low valence metal, thereby obtaining a novel compound (precursor) represented by the general formula (2); and (b) conducting in the presence of a fluoride ion a dimerization of the compound into the octafluoro[2,2]paracyclophane, R3SiX (1) where each R is independently an alkyl group or aryl group, and X is a halogen atom, 1 where R is defined as above. It is possible to produce octafluoro[2,2]paracyclophane with a high yield from 1,4-bis(trifluoromethyl)benzene, which is easily available, via the above compound.
Claims23
A process for producing octafluoro[2,2]paracyclophane, comprising:
- reacting 1,4-bis(trifluoromethyl)benzene with a halogenated silane represented by the general formula (1), in the presence of a low valence metal, thereby obtaining a compound represented by the general formula (2);
- and
- conducting in the presence of a fluoride ion a dimerization of said compound into said octafluoro[2, 2]paracyclophane,
- R3SiX (1)
- where each R is independently an alkyl group or aryl group, and X is a halogen atom,
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- where R is defined as above.
A process for producing a compound represented by the general formula (2), comprising:
- reacting 1,4-bis(trifluoromethyl)benzene with a halogenated silane represented by the general formula (1), in the presence of catalyst comprising a low valence metal, thereby obtaining said compound,
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- where each R is independently an alkyl group or aryl group,
- R3SiX (1)
- where R is defined as above, and X is a halogen atom.
A process for producing octafluoro[2,2]paracyclophane, comprising:
- conducting in the presence of a fluoride ion a dimerization of a compound, which is represented by the general formula (2) into said octafluoro[2,2]paracyclophane,
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- where each R is independently an alkyl group or aryl group.
Dependencies are inferred from the claim text.