Alkyl perfluoro-.omega.-fluoroformyl esters and their preparatio

Details Alkyl perfluoro-.omega.-fluoroformyl esters and their preparatio Alkyl perfluoro-.omega.-fluoroformyl esters and their preparatio

1977-04-20

1978-12-26

Thomas, Jr., James O.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560184, 526247, 562586, 562583, C07C 6934, C07C 6963

Patent

active

041317408

ABSTRACT:
Alkyl perfluoro-.omega.-fluoroformyl esters are provided which have the formula: ##STR1## wherein R is alkyl of 1-6 carbon atoms, and n is 0-6 (preferably 0). Compounds where n is 0 are prepared by contacting SO.sub.3 with a compound of the formula ROOC--CF.sub.2 --CF.sub.2 --OR.sup.1. Compounds where n is 1-6 are prepared by contacting a compound where n is 0 with hexafluoropropylene oxide.

REFERENCES:
patent: 3114778 (1963-12-01), Fritz et al.
patent: 3248419 (1966-04-01), Hauptschein et al.
patent: 3250808 (1966-05-01), Moore, Jr. et al.
Ryazanova, M. R. et al. "Synthesis of Fluorides of Monoesters of Dibasic Perfluoro Acids," Zh. Vses. Khim. Obshchest. (1972) 17(3) 347-348, (See Chemical Abstracts 77 (1972) #113,767p.
S(1) - Ryazanova et al. "Monoesters of Perfluorodicarboxylic Acids," (See Chemical Abstracts 79 (1973) #65,819z.
S(2) - Berenblit et al. "Electrochemical Systhesis of Perfluorocarboxylic Acids," (See Chemical Abstracts 82 (1975) #78,455q.
Lovelace, A. M. et al. "Aliphatic Fluorine Compounds," Reinhold Publ. ACS Monograph Series, (1958) pp. 47, 137-138, and 221-222.
Jacques D. et al. "Acid-catalyzed Ether Fission," Journal of the Chemical Society, (1964) pp. 2683-2689.

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