Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic halides
Reexamination Certificate
2004-01-09
2008-01-22
Puttlitz, Karl (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic halides
C562S849000, C568S407000
Reexamination Certificate
active
07321062
ABSTRACT:
A process for the synthesis of (per)fluorinated mono-functional carbonyl compounds having the following formula:in-line-formulae description="In-line Formulae" end="lead"?F—A—(RF)t—B—C(O)X1 (I)in-line-formulae description="In-line Formulae" end="tail"?wherein:X1=F, CF3;t=0, 1;A, B equal to or different from each other, are independently C1-C5(per)fluoroalkylene groups or C1-C5(per)fluorooxy-alkylene groups;RFis —Rf1—, C1-C20perfluoroalkylene, —ORf1O—; or —ORf2—, wherein Rf2is a perfluorooxyalkylene chain; wherein the carbonyl groups of a (per)fluorinated di-functional carbonyl compound of formula (III):in-line-formulae description="In-line Formulae" end="lead"?X2(O)C—A—(RF)t—B—C(O)X1 (III)in-line-formulae description="In-line Formulae" end="tail"?wherein:X1, RF, t, A and B have the above meanings;X2, equal to or different from X1, has the same meanings as X1; are partially fluorinated with elemental fluorine in the presence of a catalyst having formula MeFy.zHF, Me being an alkaline or alkaline-earth metal or Ag, y=1 or 2, z an integer from 0 to 4,carrying out said reaction at a temperature higher than a temperature such that it leads to the formation of C(O)FX2.
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Fontana Giovanni
Navarrini Walter
Arent & Fox LLP
Puttlitz Karl
Solvay Solexis S.p.A.
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