Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic halides
Patent
1994-01-18
1995-09-12
Killos, Paul J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic halides
568615, C07C 5158
Patent
active
054498252
ABSTRACT:
Process for preparing haloperfluoro and perfluoro ethers wherein a metal halide is reacted with a 3-haloperfluoropropene oxide to obtain a 2,3-dihaloperfluorocarbonyl fluoride; a metal halide, 2,3-dihaloperfluorocarbonyl fluoride and 3-haloperfluoropropene oxide are reacted to obtain a 2-(2',3'-dihaloperfluoropropoxy)-3-haloperfluoropropionyl fluoride; 2-(2',3'-dihaloperfluoropropoxy)-3-haloperfluoropropionyl fluoride is decarboxylated and dehalogenated to obtain perfluorovinylallylether. Alternatively, 2-(2',3'-dihaloperfluoropropoxy)-3-haloperfluoropropionyl fluoride is reacted with metal halide and 3-haloperfluoropropene oxide to obtain a 2-[2'-(2",3"-dihaloperfluoropropoxy)-3'-haloperfluoropropoxy]-3-haloperflu oropropionyl fluoride, or a higher polyether, and 2-[2'-(2",3"-dihaloperfluoropropoxy)-3'-haloperfluoropropoxy]-3-haloperflu oropropionyl fluoride or the polyether is decarboxylated and dehalogenated to obtain a 3,6-dioxa-5-halodifluoromethylperfluoronona-1,8-diene or the corresponding polyether.
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CA 113:131538 1990.
Ishibe Nobuyuki
Martin Charles W.
Tran Tien K.
Killos Paul J.
The Dow Chemical Company
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