Platinum–triethylamine-catalyzed hydrogenation of aldehydes and cyclohexanones

The first hydrogenation of aldehydes and chemoselective hydrogenation of cyclohexanones catalyzed by PtO2–Et3N are presented. An additionally attractive feature of this hydrogenation is being applicable to the complicated molecules. Three equivalent of triethylamine and 0.05 equiv of PtO2 in 95% ethanol are found to be the optimal condition.