P-Stereogenic <i>N</i>-Phosphine–Phosphite Ligands for the Rh-Catalyzed Hydrogenation of Olefins
作者:Maria Biosca、Pol de la Cruz-Sánchez、Oscar Pàmies、Montserrat Diéguez
DOI:10.1021/acs.joc.9b03508
日期:2020.4.3
We have identified a successful family of simple P-stereogenic N-phosphine-phosphite ligands for the Rh-catalyzed asymmetric hydrogenation of olefins. These catalysts show excellent enantiocontrol for alpha-dehydroamino acid derivatives and aenamides (ee's up to >99%) and promising results for the more challenging beta-analogues (ee's up to 80%). The usefulness of these catalytic systems was further demonstrated with the synthesis of several valuable precursors for pharmacologically active compounds, with ee's at least as high as the best ones reported previously (up to >99%).