An investigation employing the catalytic system consisting of (pentamethylcyclopentadienyl)rhodium dichloride dimer [Cp*RhCl2]2 and 2,2′-bipyridine (bpy) for transferhydrogenation of a variety of quinoxalines, quinoxalinones, quinolines and indoles under aqueous conditions with formate as the hydrogen source is reported. This approach provides various tetrahydroquinoxalines, dihydroquinoxalinones
Transfer hydrogenation of unsaturated nitrogen heterocycles using a rhodiumcatalyst immobilized on bipyridine-periodic mesoporous organosilica (BPy-PMO) is described. The immobilized catalyst was prepared by mixing [Cp*RhCl2]2 (Cp* = η5-C5Me5) with BPy-PMO powder in DMF at 60 °C and characterized by nitrogen adsorption measurements, solid-state NMR spectroscopy, X-ray diffraction, energy-dispersive
Rhodium-catalyzed transfer hydrogenation of quinoxalines with water as a hydrogen source
作者:Xia Zhang、Jingchao Chen、Ruhima Khan、Guoli Shen、Zhenxiu He、Yongyun Zhou、Baomin Fan
DOI:10.1039/c9ob02095k
日期:——
Rhodium-catalyzed transfer hydrogenation of quinoxalines with water as a hydrogensource was reported. The reaction allowed the simple preparation of tetrahydroquinoxalines under mild conditions. The deuterium-labelling experiment confirmed that water is the sole hydrogensource in the transfer hydrogenation reaction.