Dihydroxylation of 3,3,4,4,5,5-hexafluorocyclopentene by KMnO₄ afforded a highly-fluorinated 1,2-cycloalkanediol, 3,3,4,4,5,5-hexafluoro-cis-1,2-cyclopentanediol, as a colorless crystalline solid. The cis-configuration of the two hydroxy groups was elucidated by the X-ray crystallographic analysis on the dibenzoate of the 1,2-diol. Treatment of the 1,2-diol with several diacid chlorides afforded the corresponding oligoesters in good yields.

中文翻译：

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新型高度氟化的顺式-1,2-环戊二醇的合成及其在氟化低聚酯中的应用

通过KMnO ₄对3,3,4,4,5,5-六氟环戊烯进行二羟基化反应可得到高度氟化的1,2-环烷二醇，3,3,4,4,5,5-六氟-顺式-1,2-环戊二醇，为无色结晶固体。通过对1，2-二醇的二苯甲酸酯的X射线晶体学分析阐明了两个羟基的顺式构型。用几种二酰氯处理1，2-二醇得到相应的低酯，收率很高。