Propylene Carbonate as a Solvent for Asymmetric Hydrogenations?
Jerome Bayardon Dr., Jens Holz Dr., Benjamin Sch?ffner Dipl.-Chem., Vasyl Andrushko Dr., Sergej Verevkin Priv.-Doz. Dr., Angelika Preetz Dipl.-Chem., Armin B?rner Prof.?Dr.
Abstract
A penny saved is a penny earned: The use of propylene carbonate as the solvent in iridium-catalyzed hydrogenations of nonfunctionalized olefins allows efficient catalyst recycling through the formation of two-phase mixtures with nonpolar solvents such as n-hexane. In the picture, the hydrogenated tetrahydronaphthalene derivative is extracted into the hydrocarbon phase.