[4-Iodo-3-(isopropylcarbamoyl)phenoxy]acetic acid was developed as a highly reactive and easily separable catalyst for the oxidative cleavage of tetrahydrofuran-2-methanols to γ-lactones in the presence of Oxone® (2KHSO5·KHSO4·K2SO4) as the co-oxidant. The reactivity of this new catalyst was considerably greater than that of our previously reported catalyst, 2-iodo-N-isopropylbenzamide. The new catalyst and product were easily separated by only liquid–liquid separation without chromatography. In addition, using a mixture of nitromethane and N,N-dimethylformamide as the solvent and heating enabled a low catalyst loading, a short reaction time, and high product yield. Oxidative cleavage using the new catalyst can be used as a practical and efficient method for synthesizing γ-lactones.

中文翻译：

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[4-Iodo-3-(异丙基氨基甲酰基)苯氧基]乙酸作为一种高活性且易分离的催化剂，用于将四氢呋喃-2-甲醇氧化裂解为 γ-内酯

[4-Iodo-3-(异丙基氨基甲酰基)苯氧基]乙酸被开发为一种高活性且易于分离的催化剂，用于在 Oxone® (2KHSO5·KHSO4·K2SO4) 存在下将四氢呋喃-2-甲醇氧化裂解为 γ-内酯) 作为助氧化剂。这种新催化剂的反应性大大高于我们之前报道的催化剂 2-碘-N-异丙基苯甲酰胺。新催化剂和产物很容易通过仅液-液分离而无需色谱法分离。此外，使用硝基甲烷和N,N-二甲基甲酰胺的混合物作为溶剂和加热能够实现低催化剂负载、短反应时间和高产物收率。使用新催化剂进行氧化裂解可作为一种实用且有效的合成γ-内酯的方法。