Abstract

The catalytic system N-hydroxyphthalimide–Fe(III) is used for the first time in the aerobic oxidation of alkylbenzenes to the corresponding hydroperoxides. It is shown that micro amounts of Fe(асас)₃ or Fe(benz)₃ increase the efficiency of radical catalyst N-hydroxyphthalimide; as a result, hydroperoxidation of ethylbenzene and isopropylbenzene proceeds at temperatures of 90–100 and 60°C, respectively, instead of in the temperature range of 150–120°C typical of noncatalytic synthesis. At substrate conversion of 10–20%, the selectivity for hydroperoxides remains at the level of 90–95%. Further successful tests of the obtained solutions in the MoO₃/SiO₂-catalyzed epoxidation of olefins without prior removal of the catalytic system components show the promise of using this low-temperature synthesis of hydroperoxides as the initial stage of olefin epoxidation.

中文翻译：

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N-羟基邻苯二甲酰亚胺-Fe（III）均相催化体系中乙苯和异丙基氢过氧化物的制备及其在烯烃环氧化中的应用

摘要

催化系统N-羟基邻苯二甲酰亚胺-Fe（III）首次用于将烷基苯好氧氧化为相应的氢过氧化物。结果表明，少量的Fe（α）₃或Fe（benz）_3可以提高自由基催化剂N-羟基邻苯二甲酰亚胺的效率。结果，乙苯和异丙苯的加氢过氧化分别在90–100和60°C的温度下进行，而不是在非催化合成典型的150–120°C的温度范围内进行。底物转化率为10–20％时，氢过氧化物的选择性保持在90–95％的水平。MoO ₃ / SiO _2中获得的溶液的进一步成功测试在没有事先除去催化体系组分的情况下进行的烯烃的催化环氧化表明了使用这种氢过氧化物的低温合成作为烯烃环氧化的初始阶段的希望。