Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1998-05-15
1999-12-07
Kumar, Shailendra
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568403, 568407, C07C 4580
Patent
active
059986719
ABSTRACT:
A method for the preparation of a fluorinated ketone of the formula: ##STR1## where R.sub.1 and R.sub.2 are independently fluorine, alkyl of from about 1 to about 8 carbon atoms, fluoroalkyl of from about 1 to about 8 carbon atoms, or ##STR2## where R.sub.3 and R.sub.4 are independently fluorine, alkyl of from about 1 to about 8 carbon atoms, or fluoroalkyl of from about 1 to about 8 carbon atoms and n is 0 or 1. The method includes heating an anhydride of the formula: ##STR3## with a catalyst including a cationic salt of a fluorocarboxylic acid or an alkali metal fluoride to obtain the fluorinated ketone.
REFERENCES:
patent: 3091643 (1963-05-01), Wiley
patent: 4172851 (1979-10-01), Childs
"Preparation of Perfluoroalkyl Ketones", A. Nakahara. Y. Izeki, J. Nakajima, Jpn. Kokai Tokyo Koho JP 01,226,846, CA 112 [89,226,846], 1990.
C. G. Krespan and W. J. Middleton, Fluorine Chem Rev., 1, (1967) 145.
"Reactions of Perfluorinated Propylmagnesium Iodide", A. L. Henne and W. C. Francis, J. Am. Chem. Soc., 75(1953) 992.
"Trifluoroacetic Acid: Sources Of Trifluoromethyl Groups Access To Derivatives Of Triflic Acid", J. R. Desmers, G. Forat, J.M. Mas, V. Pevere, S. Ratton, N. Roques, J. Russell, L. Saint-Jalmes, Abstract O(3) C-5, 15th International Symposium of Fluorine Chemistry, Vancouver, Canada, Aug. 1997.
"Formation of Symmetrical Ketones From Self-Condensations of Anhydrides by Boron Fluoride", E. H. Man and C. R. Hauser, J. Am. Chem. Soc., 72, (1950), 3294.
Allied-Signal Inc.
Collazo Marie
Kumar Shailendra
Padmanabhan S.
Szuch Colleen D.
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