Nickel-Catalyzed Asymmetric <i>C</i>-Alkylation of Nitroalkanes: Synthesis of Enantioenriched β-Nitroamides
作者:Vijayarajan Devannah、Rajgopal Sharma、Donald A. Watson
DOI:10.1021/jacs.9b04175
日期:2019.5.29
A general catalytic method for asymmetric C-alkylation of nitroalkanes using nickel catalysis is described. This method enables the formation of highly enantioenriched β-nitroamides from readily available α-bromoamides using mild reaction conditions that are compatible with a wide range of functional groups. When combined with subsequent reactions, this method allows access to highly enantioenriched
Machine‐Assisted Preparation of a Chiral Diamine Ligand Library and In Silico Screening Using Ab Initio Structural Parameters for Heterogeneous Chiral Catalysts
containing 31 chiral diamines was synthesized using a flow-based semiautomatic reductiveaminationsystem. These ligands were evaluated in a continuous-flow asymmetric 1,4-addition reaction with a heterogeneous Ni catalyst. Based on the experimental results of ab initio DFT calculations, a prediction model for enantioselectivities was successfully constructed. Furthermore, virtual screening of possible ligands
使用基于流动的半自动还原胺化系统合成了包含 31 个手性二胺的配体库。这些配体在与非均相 Ni 催化剂的连续流动不对称 1,4-加成反应中进行了评估。基于 ab initio DFT 计算的实验结果,成功构建了对映选择性的预测模型。此外,对可能的配体进行虚拟筛选以鉴定有希望的结构,其在实验中显示出良好的对映选择性。