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US 5,015,790 AGranted
1,1,2-trifluoro-6-iodo-1-hexene, 1,1,2-trifluoro-1,5-hexadiene, and processes therefore
AssigneeE. I. Du Pont de Nemours and Company
InventorMing-Hong Hung
Life of this patent
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Abstract
Fluorine-containing iodo-substituted 1-hexenes, their preparation by the addition of two moles of ethylene to fluorine-containing iodo olefins, and their dehydroiodination to fluorine-containing 1,5-dienes are disclosed.
Claims10
A compound having the formula (I):
- X--CF.dbd.CFCH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 I (I)
- wherein X is F or C.sub.n F.sub.2n+1, and n is an integer from 1 to about 10.
A compound having the formula (II):
- X--CF.dbd.CFCH.sub.2 CH.sub. CH.dbd.CH.sub.2, (II)
- wherein X is F or C.sub.n F.sub.2n+1, and n is an integer from 1 to about 10.
A process for the preparation of a compound of formula (I):
- X--CF=CFCH2CH2CH2CH2I (I)
- wherein X is F or C.sub.n F.sub.2n+1, and n is an integer from 1 to about 10, comprising contacting at least one mole of an iododifluoroolefin of formula X--CF.dbd.CFI, wherein X is defined as in formula (I), with at least two moles of ethylene under telomerization conditions.
A process for the preparation of a compound of formula (II):
- X--CF.dbd.CFCH.sub.2 CH.sub. CH.dbd.CH.sub.2, (II)
- wherein X is F or C.sub.n F.sub.2n+1, and n is an integer from 1 to about 10, comprising:
- (a) contacting an iododifluoroolefin of formula X--CF.dbd.CFI, wherein X is defined as in formula (II) above, with an excess of ethylene under telomerization conditions to yield a compound of formula (I):
- X--CF.dbd.CFCH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 I (I)
- wherein X is defined as in formula (II) above;
- and
- (b) dehydrohalogenating said compound of formula (I) to yield a compound of formula (II).
4 more elements
The process of claim 10 wherein in step (a) a free radical inhibitor is added to the reactants to control ethylene homopolymerization.
Dependencies are inferred from the claim text.