An Exceptionally Stable Ti Superoxide Radical Ion: A Novel Heterogeneous Catalyst for the Direct Conversion of Aromatic Primary Amines to Nitro Compounds
作者:Gajanan K. Dewkar、Milind D. Nikalje、Iliyas Sayyed Ali、Abhimanyu S. Paraskar、H. S. Jagtap、A. Sudalai
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。
Tungsten- and Molybdenum-Based Coordination Polymer-CatalyzedN-Oxidation of Primary Aromatic Amines with Aqueous Hydrogen Peroxide
作者:Ankur Bordoloi、S. B. Halligudi
DOI:10.1002/adsc.200700224
日期:2007.9.3
Recyclable tungsten- and molybdenum-basedcoordination polymers efficiently catalyzed the oxidation of primaryaromaticamines to the corresponding nitroso derivatives with 30 % aqueoushydrogenperoxide in high yields at room temperature.