Asymmetric Intermolecular Pauson−Khand Reaction of Symmetrically Substituted Alkynes
作者:Yining Ji、Antoni Riera、Xavier Verdaguer
DOI:10.1021/ol901728r
日期:2009.10.1
The asymmetric intermolecularPauson−Khandreaction of symmetric alkynes has been accomplished for the first time. N-Phosphino-p-tolylsulfinamide (PNSO) ligands have been indentified as efficient ligands in this process. The chirality of the cobalt S-bonded sulfinyl moiety was found to direct olefin insertion into one of the two possible cobalt−carbon bonds in the alkyne complex. Reaction of symmetric