Patent ID: 7301052

Claim:
A process for producing a compound represented by the following formula (5-4), which comprises reacting a compound represented by the following formula (5-12) with hexafluoropropylene oxide in the presence of a source of fluoride ion, F − , to form a compound represented by the following formula (5-2), pyrolysing the compound represented by the formula (5-2) into a compound represented by the following formula (5-3), and reacting the compound represented by the formula (5-3) with methanol: FCO(CF 2 ) 2 O(CF 2 ) 2 COF (5-12), FCOCF(CF 3 )O(CF 2 ) 3 O(CF 2 ) 2 COF (5-2), CF 2 ═CFO(CF 2 ) 3 O(CF 2 ) 2 COF (5-3), CF 2 ═CFO(CF 2 ) 3 O(CF 2 ) 2 COOCH 3 (5-4).