A novel preparative method for the conversion of n-C₃F₇OCF(CF₃)CF₂OCF = CF₂ (PPVE-2) into n-C₃F₇OCF = CF₂ (PPVE-1) is reported. It includes the catalytic oxidation of PPVE-2 with molecular oxygen to furnish a mixture of carbonyl fluorides which are subjected to alkaline hydrolysis resulting in a mixture of salts. Subsequent thermolysis of those salts give rise to an inseparable mixture of PPVE-1 and perfluoro-2-propoxypropanoyl fluoride. Treatment of this mixture with sodium carbonate allowed to obtain sodium perfluoro-2-propoxypropionate and to isolate PPVE-1. Thermolysis of this sodium salt produced an additional amount of PPVE-1, so that the total conversion of PPVE-2 into PPVE-1 is accomplished in good yields. The reaction conditions, the choice of reagent as well as the course of competitive reactions are discussed.

将n -C ₃ F ₇ OCF（CF ₃）CF ₂ OCF = CF ₂（PPVE-2）转化为n -C ₃ F ₇ OCF = CF _2的新型制备方法（PPVE-1）被报告。它包括用分子氧对PPVE-2进行催化氧化，以提供羰基氟化物的混合物，然后对其进行碱解，形成盐的混合物。这些盐的随后热解产生PPVE-1和全氟-2-丙氧基丙酰氟的不可分离的混合物。用碳酸钠处理该混合物，得到全氟-2-丙氧基丙酸钠，并分离出PPVE-1。该钠盐的热解产生了额外量的PPVE-1，因此可以高收率完成PPVE-2到PPVE-1的总转化。讨论了反应条件，试剂的选择以及竞争反应的过程。