Direct Enamido C(sp<sup>2</sup>)−H Diphosphorylation Enabled by a PCET‐Triggered Double Radical Relay: Access to<i>gem</i>‐Bisphosphonates
作者:Hao‐Qiang Cao、Hao‐Nan Liu、Zhe‐Yuan Liu、Bao‐Kun Qiao、Fa‐Guang Zhang、Jun‐An Ma
DOI:10.1002/chem.202000517
日期:2020.4.24
electron-transfer (PCET)-triggered enamido C(sp2 )-H diphosphorylation. This reaction represents a rare example of realizing the challenging double C-P bond formation at a single carbon atom, thus providing facile access to a broad variety of structurally diverse bisphosphonates from simple enamides under silver-mediated conditions. Initial mechanistic studies demonstrated that the diphosphorylation involves
在这里,我们报告通过质子耦合电子转移(PCET)触发的烯键式C(sp2)-H双磷酸化来构造有价值的gem-BP的新颖而直接的协议。该反应代表了一个难得的例子,该例子实现了在单个碳原子上形成具有挑战性的双CP键,从而在银介导的条件下轻松地从简单的酰胺中获得了多种结构多样的双膦酸酯。初步的机理研究表明,二磷酸化涉及两轮PCET引发的自由基中继过程。