描述了使用 SO 2 F 2 /H 2 O 2 /碱系统对伯胺和叔胺进行高效和选择性氧化。苯胺转化为相应的偶氮苯,而伯苄胺转化为腈,仲苄胺重排为酰胺。对于叔胺底物喹啉、异喹啉和吡啶,它们的氧化产物是相应的N-氧化物。反应条件非常温和,仅涉及 SO 2 F 2、胺类、30% H 2 O 2水溶液溶液和无机碱在室温下。一个独特的优点是该氧化系统仅由廉价的无机化合物组成,而没有使用任何金属和有机化合物。
Synergy of Oxygen Vacancies and Base Sites for Transfer Hydrogenation of Nitroarenes on Ceria Nanorods
作者:Ziliang Yuan、Liang Huang、Yuanshuai Liu、Yong Sun、Guanghui Wang、Xun Li、Johannes A. Lercher、Zehui Zhang
DOI:10.1002/anie.202317339
日期:2024.2.26
additive-free synthesis of azoxy-aromatics by the transferhydrogenation of nitroarenes with ethanol as the hydrogen donor. Oxygen vacancies (Ov) and basic sites play a synergistic role, where Ov serve as the sites for adsorption and activation of ethanol as well as nitroarenes, which greatly decreases the activation energy of hydrogen atom transfer from α−Csp3−H in ethanol to nitro groups.
二氧化铈纳米棒可有效地通过以乙醇作为氢供体进行硝基芳烃的转移氢化来无添加剂地合成氧化偶氮芳香族化合物。氧空位(O v )和碱性位点发挥协同作用,其中O v作为乙醇和硝基芳烃的吸附和活化位点,大大降低了氢原子从α−C sp3 -H 转移的活化能。乙醇转化为硝基。
Shelyazhenko, S. V.; Fialkov, Yu. A.; Yagupol'skii, L. M., Journal of Organic Chemistry USSR (English Translation), 1991, vol. 27, # 9.2, p. 1737 - 1742
作者:Shelyazhenko, S. V.、Fialkov, Yu. A.、Yagupol'skii, L. M.