1: With pinacol borane; 4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl-4',4',5',5'-tetramethyl-1,3,2-dioxaborolane; 4,4'-di-tert-butyl-2,2'-dipyridyl; [Ir2(OMe)2(1,5-cyclooctadiene)2] in cyclohexane T=80°C; 24 h; 2: With sodium periodate in tetrahydrofuran; water 0.5 h; 3: With hydrogenchloride in tetrahydrofuran; water T=20°C; 17 h;

1: With sodium periodate in tetrahydrofuran; water 0.25 h; 2: With hydrogenchloride in tetrahydrofuran; water 4 h;