Asymmetric Fe<sup>II</sup>-Catalyzed Thia-Michael Addition Reaction to α,β-Unsaturated Oxazolidin-2-one Derivatives
作者:Samuel Lauzon、Hoda Keipour、Vincent Gandon、Thierry Ollevier
DOI:10.1021/acs.orglett.7b03118
日期:2017.12.1
A highly enantioselective FeII-catalyzed thia-Michael addition to α,β-unsaturated carbonyl derivatives was developed. The scope of the reaction was demonstrated with a selection of aromatic, heterocyclic and aliphatic thiols, and various Michael acceptors. The corresponding β-thioethers were obtained in good to excellent yields (up to 98%) and moderate to excellent enantioselectivities (up to 96:4
开发了高对映选择性的Fe II催化的α-β-不饱和羰基衍生物的Thia-Michael加成。通过选择芳族,杂环和脂肪族硫醇以及各种迈克尔受体来证明反应的范围。以良好至优异的产率(高达98%)和中等至优异的对映选择性(高达96:4 er)获得了相应的β-硫醚。金属的异常七配位和与α,β-不饱和恶唑烷-2-酮衍生物的螯合使得能够构建使对映选择性事件合理化的相干模型。DFT计算为观察到的立体选择性提供了建议的模型。