Synthesis of α-Quaternary Formimides and Aldehydes through Umpolung Asymmetric Copper Catalysis with Isocyanides
作者:Kentaro Hojoh、Hirohisa Ohmiya、Masaya Sawamura
DOI:10.1021/jacs.6b12881
日期:2017.2.15
A highly regio- and enantioselective copper-catalyzed three-component coupling of isocyanides, hydrosilanes, and γ,γ-disubstituted allylic phosphates/chlorides to afford chiral α-quaternary formimides was enabled by the combined use of our original chiral naphthol-carbene ligand as a functional Cu-supporting ligand and LiOtBu as a stoichiometric Lewis base for Si. The formimides were readily converted
通过结合使用我们原始的手性萘酚-卡宾配体,实现了高度区域选择性和对映选择性铜催化的异氰化物、氢硅烷和 γ,γ-二取代的烯丙基磷酸酯/氯化物的三组分偶联,以提供手性 α-季铵甲酰亚胺。功能性 Cu 支持配体和 LiOtBu 作为 Si 的化学计量路易斯碱。甲酰亚胺很容易转化为α-季醛。