Synthesis of low molecular weight perfluoro oxymethylene vinyl ethers

Autor:	U. De Patto, G. Spataro, G. Marchionni, Vito Tortelli
Rok vydání:	2003
Předmět:	Reaction step Organic Chemistry Photodissociation Perfluoropolyether Biochemistry Adduct Inorganic Chemistry Propene chemistry.chemical_compound chemistry Polymer chemistry Environmental Chemistry Physical and Theoretical Chemistry Perfluorohexane
Zdroj:	Journal of Fluorine Chemistry. 119:83-88
ISSN:	0022-1139
DOI:	10.1016/s0022-1139(02)00240-3
Popis:	Perfluoro oxymethylene vinyl ethers have been formed by a multi-step synthesis. The key intermediates are low molecular weight perfluoropolyether (PFPE) fluoroformates CF 3 O(CF 2 O) n COF ( I ) n =1–6 obtained from the photo-oxidation of perfluoro propene (HFP) in perfluorohexane. Under certain conditions the light-mediated fluorination of PFPE fluoroformates ( I ) gives PFPE hypofluorites CF 3 O(CF 2 O) n CF 2 OF ( II ), which can be added to sym dichlorodifluoroethene to form the dichloro adduct CF 3 O(CF 2 O) n CF 2 OCFClCF 2 Cl ( III ) which, after dechlorination, gives the desired vinyl ethers CF 3 O(CF 2 O) n CF 2 OCFCF 2 ( IV ). Every reaction step has to be properly controlled as far as the reaction variables are concerned. A mechanistic scheme is presented that is consistent with the observed experimental data.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1d0c94fdf10b4eb6861a935e7566bb3f https://doi.org/10.1016/s0022-1139(02)00240-3 Zobrazit plný text záznamu Full Text from ScienceDirect