Process for producing perfluorodiacyl fluorinated compounds

Details Process for producing perfluorodiacyl fluorinated compounds Process for producing perfluorodiacyl fluorinated compounds

2007-11-27

2007-11-27

Puttlitz, Karl (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C562S599000, C562S605000

Reexamination Certificate

active

11206915

ABSTRACT:
The present invention provides a process for producing compounds useful as raw materials for various fluororesins in high yields in few steps from inexpensive and readily available starting materials.The following compound (1) and the following compound (2) are reacted to form the following compound (3), then the compound (3) is fluorinated in a liquid phase to form the following compound (4), and the ester bonds in the compound (4) are dissociated to form the compound (5), or the compound (5) and the compound (6).in-line-formulae description="In-line Formulae" end="lead"?HOCH2-Q-O—(CH2)3—OH,  (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?CRBCOX,  (2)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?RBCOOCH2-Q-O—(CH2)3—OCORB,  (3)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?RBFCOOCF2-QF-O—(CF2)3—OCORBF,  (4)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?FCO-QF-O—(CF2)2—COF,  (5)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?RBFCOF.  (6)in-line-formulae description="In-line Formulae" end="tail"?

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U.S. Appl. No. 11/669,989, filed Feb. 1, 2007, Umemura et al.

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