challenging direct asymmetric catalytic aerobicoxidativecross‐coupling of 2‐naphthylamine and 2‐naphthol, using a novel CuI/SPDO system, has been successfully developed for the first time. Enantioenriched 3,3′‐disubstituted NOBINs were achieved and could be readily derived to divergent chiral ligands and catalysts. This reaction features high enantioselectivities (up to 96 % ee) and good yields (up to
首次成功开发了具有挑战性的2-萘胺和2-萘酚的直接不对称催化好氧氧化交叉偶联,使用新型Cu I / SPDO系统。获得了对映体富集的3,3'-双取代NOBIN,可以很容易地衍生出不同的手性配体和催化剂。该反应具有高对映选择性(高达96%ee)和良好的产率(高达80%)。在DFT计算表明,CF之间在F-H相互作用3的L17和2-萘酚的H-1,8,和两个联接伙伴之间的π-π堆叠可以在这个交叉偶联反应的enantiocontrol起到至关重要的作用。
Asymmetric Hydrogenation of Unfunctionalized Tetrasubstituted Acyclic Olefins
作者:Raphael Bigler、Kyle A. Mack、Jeff Shen、Paolo Tosatti、Chong Han、Stephan Bachmann、Haiming Zhang、Michelangelo Scalone、Andreas Pfaltz、Scott E. Denmark、Stefan Hildbrand、Francis Gosselin
DOI:10.1002/anie.201912640
日期:2020.2.10
Asymmetrichydrogenation has evolved as one of the most powerful tools to construct stereocenters. However, the asymmetrichydrogenation of unfunctionalized tetrasubstituted acyclic olefins remains the pinnacle of asymmetric synthesis and an unsolved challenge. We report herein the discovery of an iridium catalyst for the first, generally applicable, highly enantio- and diastereoselective hydrogenation
Lewis Base‐Catalysed Enantioselective Radical Conjugate Addition for the Synthesis of Enantioenriched Pyrrolidinones
作者:Will C. Hartley、Florian Schiel、Elena Ermini、Paolo Melchiorre
DOI:10.1002/anie.202204735
日期:2022.6.27
to realise the first example of asymmetric radical conjugate addition to α,β-unsaturated anhydrides and esters. The chemistry, mastered by a chiral isothiourea organocatalyst, enables the synthesis of enantioenriched pyrrolidinones, with application to the synthesis of biologically-active γ-amino butyric acids.