The present invention provides novel processes for preparing a fluorinated acyl
fluoride and a fluorinated vinyl ether.
Namely, it provides a process for preparing a fluorinated acyl fluoride (3),
which comprises reacting a compound (1) having a fluorine content of 30 mass %
or above with fluorine in a liquid phase to form a compound (2) and then dissociating
the ester bond in the compound (2), and a process for preparing a fluorinated vinyl
ether (10), which comprises pyrolyzing the fluorinated acyl fluoride:
##STR1##
wherein RA and RB are alkyl groups or the like, or
the combination RA and RB is an ethereal oxygen-containing
alkylene group or the like, RC and RD are perfluoro(ethereal
oxygen-containing alkyl) groups or the like, or the combination of RC and
RD is a perfluoro(ethereal oxygen-containing alkylene) group or the
like, X1, X2, X3, X4, X5 and
X6 are hydrogen atoms, fluorine atoms or the like, RAF, RBF,
RCF and RDF are groups derived respectively from RA,
RB, RC and RD by replacing substantially all of
the hydrogen atoms by fluorine atoms.
