1: With sodium tetrahydroborate in ethanol hydrotelluration; 2: With n-butyllithium; ammonium chloride in tetrahydrofuran transmetallation, protonolysis;
1: With tri-isobutyl aluminium; bis-triphenylphosphine-palladium(II) chloride in dichloromethane T=25°C; 12 h; 2: With sodium hydroxide; oxygen in dichloromethane
