lithium aluminium tetrahydride in tetrahydrofuran T=0 - 20°C; Inert atmosphere;

bei der elektrolytischen Reduktion;

[2,2']bipyridinyl; ammonium cerium (IV) nitrate; 2,2,6,6-tetramethyl-1-piperidinyloxy, free radical; CsOH; oxygen; copper(l) chloride in acetonitrile T=30 - 60°C; P=760.051 Torr; 48 h; Schlenk technique;