Rhodium catalyzed asymmetric 1,4-addition of arylboronic acids to β,γ-unsaturated α-keto ester using chiral tert-butanesulfinylphosphines ligands
作者:Juanjuan Wang、Bing Wang、Peng Cao、Jian Liao
DOI:10.1016/j.tetlet.2014.04.074
日期:2014.6
Rh-Catalyzed asymmetric 1,4-selective addition of arylboronicacids to β,γ-unsaturated α-keto ester was developed using chiral tert-butanesulfinylphosphine as ligand, good yields (up to 87%), good 1,4-regioselectivities (up to 96:4), and high enantioselectivities (up to 94% ee) were achieved.
Chiral Sulfinamide-Olefin Ligands: Switchable Selectivity in Rhodium-Catalyzed Asymmetric 1,2-Addition of Arylboronic Acids to Aliphatic<i>α</i>-Ketoesters
作者:Ting-Shun Zhu、Ming-Hua Xu
DOI:10.1002/cjoc.201300063
日期:2013.3
es have been developed as efficient novel ligands for the rhodium‐catalyzed enantioselective 1,2‐addition of arylboronic acids to challenging aliphatic α‐ketoesters. By employing the linear or branched sulfinamide‐olefin ligands, interesting enantioselectivity as well as regioselectivity reversal in the related asymmetricadditions were observed.
Organocatalytic Asymmetric Formal [3+3]‐Cycloaddition to Access 2,3‐Diazaspiro[4.5]deca‐3,6‐dien‐1‐ones
作者:A. Vamshi Krishna、G. Surendra Reddy、B. Gorachand、Dhevalapally B. Ramachary
DOI:10.1002/ejoc.202001175
日期:2020.11.15
Single structure out of many domino reactions! Double sequence of isoaromatization and dearomatization driven the domino Michael/aldol or formal [3+3]‐cycloaddition as an efficient tool for the construction of chiral drug‐like 2,3‐diazaspiro[4.5]deca‐3,6‐dien‐1‐ones having spirocyclic vicinal quaternary carbon centers.