We report herein a regio‐ and stereoselective photocatalytic hydrogenolysis of allylicalcohols to form unsaturated hydrocarbons employing a palladium(II)‐loaded titanium oxide; the reaction proceeds at room temperature under light irradiation without stoichiometric generation of salt wastes. Olefin and saturated alcohol moieties tolerated the reaction conditions. Hydrogen atoms were selectively incorporated
Palladium-Catalyzed Regio- and Stereoselective Reduction of Allylic Compounds with LiHBEt<sub>3</sub>. Application to the Synthesis of Co-enzyme Q<sub>10</sub>
Regio- and stereoselective desulfonylation of allylic sulfones with LiHBEt3 in the presence of a catalytic amount of [PdCl2(dppp)] was successfully applied to the synthesis of co-enzymeQ10. It was found that this reduction system was applicable to a wide variety of allylic functional groups.
Allylic p-tolyl sulfones were easily desulfonylated to the corresponding alkenes by LiHBEt3 in the presence of a catalytic amount of [PdCl2(dppp)] under mild conditions with the preservation of the original stereochemistry. This reaction was successfully applied to the synthesis of squalene.