335-66-0Relevant articles and documents
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De Pasquale,R.J.
, p. 3025 - 3030 (1973)
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EINSTUFIGE HERSTELLUNG HALOGENIERTER CARBONSAUREFLUORIDE AUS DEN FREIEN SAUREN
Schwertfeger, W.,Siegemund, G.
, p. 237 - 246 (1987)
The reaction of per- or polyhalogenated carboxylic acids with trifluoromethyl or difluorochloromethyl substituted aromatics takes place in the presence of Lewis-acid-catalysts and forms the corresponding acid fluorides in good to very good yields.
PROCESSES FOR PRODUCTION OF FLUORINE-CONTAINING COMPOUNDS
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Page/Page column 12, (2010/09/05)
This process for producing fluorine-containing compounds includes liquid-phase fluorination by introducing a raw material compound and fluorine gas into a solvent to replace hydrogen atoms in the raw material compound with fluorine atoms. More specifically, the process for producing fluorine-containing compounds includes (1) promoting fluorination by dissolving the raw material compound in anhydrous hydrofluoric acid and introducing into a liquid-phase fluorination solvent, or (2) promoting fluorination by dissolving the raw material compound in a perfluoro compound having a plurality of polar groups in a molecule thereof and introducing into a liquid-phase fluorination solvent. According to these processes, a fluorination reaction can be carried out at high yield and without containing hardly any isomers while using a hydrocarbon compound as is for the raw material.
A Lewis acid catalytic process for preparing fluorocarboxylic acid halides
Behr,Cheburkov
, p. 369 - 372 (2007/10/03)
Selected Group III and Group V Lewis acids were found to catalyze the isomerization and rearrangement of halosulfonyldifluoromethyl group (Rf-CF2SO2X, where X is either chlorine or fluorine) to form fluorocarboxylic acid halides (RfCOX). Fluorodesulfoxylation of the halosulfonyldifluoromethyl group yielded SOF2 as one of the two sulfur-containing oxides. Product analysis would suggest that both Lewis acid catalyzed and halogen exchange reactions are occurring and are dependent upon the starting halosulfonyldifluoromethyl material and Lewis acid.