Enantioselective transition metal catalysis has emerged as a unique tool for the introduction of chirality in pharmaceuticals and fine chemical intermediates. Asymmetric catalytic hydrogenation has become particular important as many different building blocks with a variety of functional groups becomes accessible. 1 Traditionally, chiral bidentate phosphine ligands 2 have dominated this field until more recently Feringa and De Vries, 3 Reetz 4 and Pringle 5 introduced the ...
