手性配体和催化剂发现的手性结构的开发对于不对称催化至关重要。在此,我们报告了以 Si 为中心的螺环骨架、spirobiphenoxasilin-diol (SPOSiOL) 及其衍生手性配体的简明合成。使用化学拆分方法,可以在克级以高产率获得光学 SPOSiOL。初步研究表明,该配体支架在过渡金属催化的不对称反应中具有巨大潜力。这一发现进一步强调了以 Si 为中心的螺环支架在不对称催化中具有重要价值。
Asymmetric Synthesis and Application of Chiral Spirosilabiindanes
作者:Xin Chang、Pei‐Long Ma、Hong‐Chao Chen、Chuan‐Ying Li、Peng Wang
DOI:10.1002/anie.202002289
日期:2020.6.2
class of chiral spirosilabiindane scaffolds by Rh-catalyzed asymmetric double hydrosilation, for the first time. Enantiopure SPSiOL (spirosilabiindane diol), a new type of chiral building block for the preparation of various chiral ligands and catalysts, was readily prepared on greater than 10 gram scale using this protocol. The potential of this new spirosilabiindane scaffold in asymmetric catalysis
Asymmetric Palladium-Catalyzed Carboamination Reactions for the Synthesis of Enantiomerically Enriched 2-(Arylmethyl)- and 2-(Alkenylmethyl)pyrrolidines
作者:Duy N. Mai、John P. Wolfe
DOI:10.1021/ja106989h
日期:2010.9.8
The enantioselective synthesis of 2-(arylmethyl)- and 2-(alkenylmethyl)pyrrolidine derivatives via Pd-catalyzed alkenecarboaminationreactions is described. These transformations generate enantiomericallyenriched products with up to 94% ee from readily available alkenyl or aryl bromides and N-boc-pent-4-enylamines. The application of this method to a concise asymmetricsynthesis of (-)-tylophorine
Thianthrenation-Enabled Pyrrolidin-2-yl and Tetrahydrofuran-2-yl Methylation of (Hetero)Arenes
作者:Boyu Peng、Licheng Dai、Ruzhang Liu
DOI:10.1021/acs.orglett.3c00582
日期:2023.4.21
and the developed Pd-catalyzed alkene carboamination and carboalkoxylationreactions afforded the corresponding biologically important pyrrolidine and tetrahydrofuran derivatives. Mechanistic studies indicated that this reaction proceeds through a syn-heteropalladation mechanistic pathway. The demonstrated late-stage functionalization and enantioselectivereaction will help to promote the potential