A Class of N–O-Type Oxidants To Access High-Valent Palladium Species
作者:Manuel Nappi、Matthew J. Gaunt
DOI:10.1021/acs.organomet.8b00712
日期:2019.1.14
capable of oxidizing palladacycle(II) complexes to high-valent palladium species, promoting the formation of C–N bonds in stoichiometric and catalytic conditions. The weak N–O bond and the extremely electron-withdrawing benzenesulfonate group on the oxygen atom of the oxidant are crucial moieties to ensure the desired activity. The oxidation mechanism could involve outer-sphere single-electron transfer
Synthetic access to previously elusive single enantiomers of an octahedral chiral-at-metal rhodium(III) complex containing two cyclometalated 2-phenylbenzothiazoles and two acetonitrile ligands is reported. The complex is a superior chiral Lewis acid catalyst compared to its benzoxazole congener which can be rationalized with a higher steric congestion around the coordination sites.