抄録
New fluorinated dicarboxylic acids, 3, 3, 4, 4, 5, 5, 6, 6-octafluorooctanedioic acid [2 a] and 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8-dodecafluorodecanedioic acid [2 b], having a methylene group between perfluoroalkylene and each carboxyl group, were synthesized in high yields, by the oxidation of corresponding diols[1] with CrO3/H2SO4 (Jones reagent). Oxidation of [1] with other oxdizing reagents such as nitric acid and KMnO4 did not virtually give[2].
These dicarboxylic acids are useful not only as monomers of fluorinated polycondensation polymers, but also as precursors of other difunctional monomers such as bis(carboxyl chlorides)[3]and diisocyanates [4].
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