Preparation of vinyl ethers
AssigneeThe Dow Chemical Company
InventorsBobby R. Ezzell, William P. Carl, William A. Mod
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Abstract
The invention relates to a process to produce compounds represented by the general formula Y--(CFR.sub.f).sub.a --(CFR.sub.f ').sub.b --O--CF.dbd.CF.sub.2 by decarboxylation of compounds represented by the general formula ##STR1## where a=0-3; b=0-3; provided a+b=2 or 3; Y.dbd.an acid derivative; X.dbd.Cl, I, or Br; M.dbd.OR, F, Cl, Br, I, OA; A.dbd.alkali metal, alkali earth metal, a quaternary nitrogen and hydrogen; R.sub.f ' and R.sub.f are independently selected from the group consisting of F, Cl, perfluoroalkyls and fluorochloroalkyls R.dbd.an alkyl having one or more carbon atoms or an aryl.
Claims11
A method of preparing compounds represented by the general formula:
- Y(CFR.sub.f).sub.a --(CFR'.sub.f).sub.b --O--CF.dbd.CF.sub.2
- which comprises decarboxylating ##STR34## in the presence of an activator when M.dbd.OR, F, Cl, Br or I and at a temperature of from about 50.degree. C. to about 600.degree. C. for a time sufficient for said decarboxylation to occur where:
- ##STR35## R.sub.f ' and R.sub.f are independently selected from the group consisting of F, Cl, perfluoroalkyl radicals and fluorochloroalkyl radicals;
- Z=OR, F, Cl, Br or I;
- a=0-3;
- b=0-3;
- a+b=2 or 3;
- M=OR, F, Cl, Br, I or OA;
- A is selected from the group consisting of alkali metals, alkali earth metals, quaternary nitrogen and hydrogen;
- and
- R=an alkyl containing one or more carbon atoms or an aryl.
Dependencies are inferred from the claim text.