Exploration of a Chiral Cobalt Catalyst for Visible‐Light‐Induced Enantioselective Radical Conjugate Addition
作者:Kai Zhang、Liang‐Qiu Lu、Yue Jia、Ying Wang、Fu‐Dong Lu、Fangfang Pan、Wen‐Jing Xiao
DOI:10.1002/anie.201907478
日期:2019.9.16
Chiral catalysts tolerating photochemical reactions are in great demand for the vast development of visible-light-induced asymmetric synthesis. Now, chiral octahedral complexes based on earth-abundant metal and chiral N4 ligands are reported. One well-defined chiral CoII -complex is shown to be an efficient catalyst in the visible-light-induced conjugated addition of enones by alkyl and acyl radicals
对于可见光诱导的不对称合成的巨大发展,对光化学反应的手性催化剂有很高的要求。现在,已经报道了基于地球上丰富的金属和手性N4配体的手性八面体络合物。一种定义明确的手性CoII配合物被证明是在可见光诱导的烷基和酰基基团烯酮的共轭加成中的有效催化剂,提供了合成有价值的手性酮和1,4-二羰基化合物,产率为47-> 99%高达97:3 er