Process for the preparation of (per)fluorinated...

Details Process for the preparation of (per)fluorinated... Process for the preparation of (per)fluorinated...

2004-01-09

2008-05-20

Eyler, Yvonne (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C562S840000, C562S849000, C562S852000, C562S856000, C562S861000

Reexamination Certificate

active

07375253

ABSTRACT:
A process for the synthesis of (per)fluorinated mono-functional carbonyl compounds having the following formula (I):in-line-formulae description="In-line Formulae" end="lead"?F-A-RF—B—C(O)X1  (I)in-line-formulae description="In-line Formulae" end="tail"?wherein:X1=F, CF3;A, B equal to or different from each other, are independently (per)fluoroalkylene or (per)fluorooxyalkylene groups;RFis —ORf1O— wherein Rf1=perfluoroalkylene or —ORf2, wherein Rf2is a perfluorooxyalkylene chain;said process comprising the following steps:A) obtainment of the formula (II) mono-hypofluorite:in-line-formulae description="In-line Formulae" end="lead"?FO—CFX2-A-RF—B—C(O)X1  (II)in-line-formulae description="In-line Formulae" end="tail"?by partial fluorination with elemental fluorine of the carbonyl groups of the formula (III) compound:in-line-formulae description="In-line Formulae" end="lead"?X2(O)C-A-RF—B—C(O)X1  (III)in-line-formulae description="In-line Formulae" end="tail"?in the presence of a formula MeFy catalyst, Me being an alkaline or alkaline-earth metal or Ag, y=1 or 2;B) thermal decomposition of the compound (II) to give the compounds according to the following scheme:in-line-formulae description="In-line Formulae" end="lead"?FO—CFX2-A-RF—B—C(O)X1(II) - - - →F-A-RF—B—C(O)X1(I)+(O)CFX2.in-line-formulae description="In-line Formulae" end="tail"?

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