Minute amounts of supported Au nanoparticles on TiO2 (0.1 mol%) catalyze quantitatively at room temperature the transfer hydrogenation of azoarenes to hydrazoarenes by ammonia borane complex, in ethanol as solvent. At 1 mol% catalyst loading level and 2.5 molar equivalents of ammonia borane the process occurs instantaneously. The catalyst is recyclable and reusable. In the absence of reducing agent,
TiO 2上的微量负载Au纳米颗粒(0.1 mol%)在室温下定量催化在
乙醇作为溶剂中通过
氨硼烷络合物将偶氮
芳烃转移氢化为腙
芳烃。在 1 mol% 催化剂负载
水平和 2.5 摩尔当量
氨硼烷下,该过程立即发生。该催化剂可回收、可重复使用。在没有还原剂的情况下,亚氮
芳烃经历顺利的Au/TiO 2催化的有氧氧化回到偶氮
芳烃。