Ozonolysis of 1-methoxyperfluorocyclobutene in Freon-113 followed by h
ydrogenation of the reaction products gave methyl hydrogen perfluorosu
ccinate. Under similar conditions, perfluorooct-1- and -2-enes and luo
romethyl-1,1,1,2,3,4,5,5,5-nonafluoropent-2-ene were converted into pe
rfluorinated heptanoic, hexanoic, and isobutyric acids, respectively.