Elemental Fluorine Based Syntheses of Pentafluoro Phenyl and Other Aromatic Perfluoropolyether Polymers.
Abstract
As an approach to the preparation of organic molecules with very high thermooxidative stability, a study was carried out on the preparation of perfluorinated aromatic compounds by liquid-phase direct fluorination of aromatic hydrocarbon precursors followed by reductive defluorination. Diphenylether was converted to a perfluoro(dicyclohexylether) intermediate, however reductive defluorination afforded perfluoro(benzofuran) rather than perfluoro(diphenylether). By contrast, biphenyl was converted in high yield to perfluoro(dicyclohexyl) which, upon reductive defluorination afforded perfluoro(diphenyl). Diphenyl ketone was converted to perfluoro(dicyclohexyl) ketone, reductive defluorination of which is under investigation. Similarly, the o-, m-, and p- isomers of diphenoxybenzene were successfully fluorinated to the corresponding perfluoro(dicyclohexanoxylcyclohexanes), the reductive defluorination of which is under investigation. jg
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 1995
- Accession Number
- ADA294930
Entities
People
- Richard J. Lagow
Organizations
- University of Texas at Austin