1,2,3,4 Tetrakis-(perfluoroalkyl)-1,3-butadienes
US3983179A · kind A · utility
2Cited by
3References
7Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 28, 1975 |
| Grant date | Sep 28, 1976 |
| Priority date | — |
| Expiry date | Jan 28, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/281
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A polyfluorinated butadiene having the formula ##EQU1## wherein n and m are integers from 1 to 10 and n=m or n.noteq.m, is prepared by reductive coupling, exemplarily with copper, of the corresponding 1,2-bis(perfluoroalkyl)iodoethylene having the formula CF.sub.3 (CF.sub.2).sub.n CH = CI--(CF.sub.2).sub.m CF.sub.3. This iodoethylene is conveniently prepared by a simple addition reaction between a perfluoroalkyl iodide and a perfluoroalkyl acetylene. The perfluoralkylated butadienes are useful as transporters of dissolved gas, particularly of oxygen as in blood substitutes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.