Process for the preparation of 2-perfluoropropoxy-perfluoropropi

Details Process for the preparation of 2-perfluoropropoxy-perfluoropropi Process for the preparation of 2-perfluoropropoxy-perfluoropropi

1986-05-20

1988-03-08

Moyer, Donald B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 5158

Patent

active

047298561

ABSTRACT:
Process for the preparation of 2-perfluoropropoxy-perfluoropropionyl fluoride by dimerization of hexafluoropropene epoxide in aprotic polar medium, in the presence of N,N,N',N'-tetrasubstituted diaminodifluoromethane as catalyst, characterized in that the dimerization reaction is carried out in the presence of a co-catalyst constituted by a nitrogenous organic base having structure of aniline, or of pyridine, or of a derivative thereof, wherein the nitrogen atom is not linked to hydrogen atoms and, in the case of the pyridine-type structure, it is sterically hindered by substituent groups on ortho-position relatively to it.

REFERENCES:
patent: 4118421 (1978-10-01), Martini
patent: 4390720 (1983-01-01), Resnick

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