1: alpha-chloropyridine With lithium diisopropyl amide in diethyl ether T=-60°C; 0.75 h; 2: With tri-isopropoxy-borane in diethyl ether T=-60 - 20°C; 3: 2,3-dimethylbutane-2,3-diol With acetic acid in diethyl ether T=20°C; 2 h;

1: bromo-3 chloro-2 pyridine With n-butyllithium in diethyl ether T=-78°C; 1 h; 2: With tri-isopropoxy-borane in diethyl ether T=-78 - 20°C; 3: 2,3-dimethylbutane-2,3-diol With acetic acid in diethyl ether T=20°C; 2 h;

1: 3-iodo-2-chloropyridine With n-butyllithium in diethyl ether T=-78°C; 1 h; 2: With tri-isopropoxy-borane in diethyl ether T=-78 - 20°C; 3: 2,3-dimethylbutane-2,3-diol With acetic acid in diethyl ether T=20°C; 2 h;

magnesium sulfate in diethyl ether T=20°C; 16 h;

dihydrogen peroxide in dichloromethane; water T=20°C; 20 h;