1: With zirconium tetrachloride; diisobutylaluminium hydride in hexane; toluene T=20°C; 7 h; 2: With oxygen in hexane; toluene T=20 - 40°C; 4 h; 3: With sulfuric acid in hexane; toluene T=0 - 20°C; Further stages.;
1: With tri-isobutyl aluminium; bis-triphenylphosphine-palladium(II) chloride in dichloromethane T=25°C; 12 h; 2: With sodium hydroxide; oxygen in dichloromethane
