dihydrogen peroxide; methyltrioxorhenium (VII) in ethanol T=-50 - 20°C; 1 h;

4-(N,N-dimethlyamino)pyridine; copper(l) iodide; ABNO; oxygen; 4,4'-di-tert-butyl-2,2'-dipyridyl in acetonitrile T=20°C; P=760.051 Torr; 15 h; Reagent/catalyst; Overall yield = 95 percent;

2,3'-bipyridine; ammonium hydroxide; copper(l) iodide; 2,2,6,6-tetramethyl-1-piperidinyloxy, free radical; oxygen in acetonitrile T=50°C; 24 h; Overall yield = 75 percent; Overall yield = 111.9 mg;