Electro‐mediated PhotoRedox Catalysis for Selective C(sp
<sup>3</sup>
)–O Cleavages of Phosphinated Alcohols to Carbanions
作者:Xianhai Tian、Tobias A. Karl、Sebastian Reiter、Shahboz Yakubov、Regina Vivie‐Riedle、Burkhard König、Joshua P. Barham
DOI:10.1002/anie.202105895
日期:2021.9.13
As well as deoxygenations, olefinations are reported which are E-selective and can be made Z-selective in a tandem reduction/photosensitization process where both steps are photoelectrochemically promoted. Spectroscopy, computation, and catalyst structural variations reveal that our new naphthalene monoimide-type catalyst allows for an intimate dispersive precomplexation of its radical anion form with
我们报告了电介导光氧化还原催化(e-PRC)将膦酸醇的 C(sp 3 )−O 键还原裂解为烷基碳负离子的新例子。除了脱氧作用之外,据报道,烯化作用是E选择性的,并且可以在串联还原/光敏化过程中进行Z选择性,其中两个步骤都是光电化学促进的。光谱、计算和催化剂结构变化表明,我们的新型萘单酰亚胺型催化剂允许其自由基阴离子形式与次膦酸盐底物紧密分散预络合,促进决定反应性的 C(sp 3 )−O 裂解。令人惊讶的是,与之前报道的光激发自由基阴离子化学相反,我们的条件耐受芳基氯/溴化物并且不会引起桦木型还原。