asymmetric ketal and acetal hydrogenation process, process for the manufacture of aldehydes or ketones, composition and use thereof

摘要

Abstract Asymmetric Hydrogenation Process of Ketals and Acetals The present invention relates to an asymmetric hydrogenation process of a ketone of an unsaturated ketone or an acetal of a molecular hydrogen unsaturated aldehyde in the presence of at least one chiral iridium complex. This process produces chiral compounds in a very efficient manner and is very advantageous because the amount of iridium complex can be greatly reduced.