Nickel-Catalyzed Enantioselective Carbamoyl Iodination: A Surrogate for Carbamoyl Iodides
作者:Austin D. Marchese、Marco Wollenburg、Bijan Mirabi、Xavier Abel-Snape、Andrew Whyte、Frank Glorius、Mark Lautens
DOI:10.1021/acscatal.0c00841
日期:2020.4.17
This work reports the enantioselective formal transfer of a carbamoyl iodide across a 1,1-disubstituted styrene using Ni-catalysis. Employing an air-stable Ni(II) precatalyst and a commercially available chiral ligand ((S)-tBuPHOX), enantioenriched 3,3-disubstituted iodooxindoles were obtained in up to 90% yield and up to 97:3 e.r. This methodology was applied to the total synthesis of (−)-esermethole
这项工作报告了使用Ni催化的氨基甲酸酯碘化物通过1,1-二取代苯乙烯的对映选择性形式转移。使用空气稳定的Ni(II)预催化剂和市售手性配体((S)-t BuPHOX),可以获得对映体富集的3,3-二取代碘代吲哚,产率高达90%,产率高达97:3 er。应用于(-)-乙二胺和(-)-芬丝氨酸的总合成。