A matrix-bound superoxide radical anion, generated by treating Ti(OR)4 (R=iPr, nBu) with H2 O2 , is a selective heterogeneous catalyst for the oxidation of anilines to the corresponding nitroarenes with 50 % aqueous H2 O2 [Eq. (1)]. Yields of 82-98 % are obtained, even with anilines bearing electron-withdrawing substituents (R=NO2 , COOH).
通过用H 2 O 2处理Ti(OR)4(R = iPr,nBu)生成的与基质结合的超氧自由基阴离子是一种选择性多相催化剂,用于用50%H 2 O
水溶液将
苯胺氧化为相应的硝基
芳烃2 [式 (1)]。即使具有带吸电子取代基的
苯胺(R = NO 2,COOH),也可得到82-98%的产率。