Highly enantioselective 1,3-dipolar cycloaddition of azomethine ylides catalyzed by AgOAc/TF-BiphamPhos
作者:Chun-Jiang Wang、Zhi-Yong Xue、Gang Liang、Zhou Lu
DOI:10.1039/b902556a
日期:——
A novel and highly efficient AgOAc/TF-BiphamPhos catalytic system shows excellent reactivity, diastereo-/enantioselectivity and structural scope in asymmetric 1,3-dipolar cycloaddition of azomethine ylides, especially derived from various α-substituted α-amino acids, with N-substituted maleimides and other electron-deficient alkenes.
Zinc‐Catalyzed Enantioselective [3+2] Cycloaddition of Azomethine Ylides Using Planar Chiral [2.2]Paracyclophane‐Imidazoline N,O‐ligands
作者:Sundaravel Vivek Kumar、Patrick J. Guiry
DOI:10.1002/anie.202205516
日期:2022.8.15
novel [2.2]paracyclophane-derived ligands (UCD-IMPHANOL) possessing central chirality and planar chirality has been developed. These ligands demonstrated excellent enantioselectivities in the asymmetric Zn-catalyzed azomethineylidecycloaddition.