Mn(OAc)<sub>3</sub>‑Promoted Oxidative C<sub>sp<sup>3</sup></sub>–P Bond Formation through C<sub>sp<sup>2</sup></sub>–C<sub>sp<sup>2</sup></sub> and P–H Bond Cleavage: Access to β‑Ketophosphonates ZhouPan HuBiao LiLingdan RaoKairui YangJiao YuFuchao 2017 The Mn­(OAc)<sub>3</sub>-promoted oxidative phosphonylation of <i>N</i>,<i>N</i>-dimethylenaminones with H-phosphonates, involving a chemo- and regioselective C<sub>sp<sup>2</sup></sub>–C<sub>sp<sup>2</sup></sub> bond cleavage and C<sub>sp<sup>3</sup></sub>–P bond formation in one step, provided successfully functionalized β-ketophosphonates under mild reaction conditions. Oxidative C<sub>sp<sup>3</sup></sub>–H/P–H cross-coupling reactions via C<sub>sp<sup>3</sup></sub>–C­(CO) bond cleavage and mechanistic studies are conducted preliminarily, and a possible mechanism is proposed. This novel method proceeds in good to excellent yields, shows operational simplicity, broad substrate scope, and large-scale preparation.