Regioselective C–H Activation Preceded by C<sub>sp<sup>2</sup></sub>–C<sub>sp<sup>3</sup></sub> Reductive Elimination from Cyclometalated Platinum(IV) Complexes
作者:Craig M. Anderson、Margarita Crespo、Nicole Kfoury、Michael A. Weinstein、Joseph M. Tanski
DOI:10.1021/om400398g
日期:2013.8.12
Reductive elimination reactions of the cyclometalated platinum-(IV) compounds [PtMe2ClC6H4CH=NCH2(4-ClC6H4)}L] and [PtMe2BrC6H4CH=NCH2(C6H5)}L] (L = SMe2, PPh3) to form C-sp3-C-sp2 bonds, followed by either exclusive C H bond activation (L = SMe2) or competition between C-sp2-H and C-sp3-H bond activation (L = PPh3), are reported. Isomerization to give endo products instead of the expected exo complex was observed for the ligand C6H4CH=NCH2(2-BrC6H5), and formation of an endo six-membered platinacycle occurs for the ligand 2,4,6-Me3C6H2CH=NCH2(2-BrC6H4).