Highly Enantioselective Rh-Catalyzed Arylation of N,N-Dimethylsulfamoyl-Protected Aldimines and Cyclic N-Sulfonylimines with Chiral Phenyl Backbone Sulfoxide-Olefin Ligands
作者:Feng Xue、Qibin Liu、Boshun Wan、Yong Zhu、Yifei Huang、Jimeng Ge
DOI:10.1055/s-0037-1610749
日期:2020.5
sulfoxide-olefin ligands, a highlyRh-catalyzed addition of arylboronic acids to N,N-dimethylsulfamoyl-protected aldimines has been developed to afford a broad range of chiral diarylmethylamines in high yields (up to 99%) with excellent enantioselectivities (up to 99% ee). Moreover, efficient enantioselective arylation of cyclic N-sulfonylimines was also achieved with excellent enantioselectivities (up to 98% ee)
Highly enantioselective palladium-catalyzed formal hydrogenolysis of racemic N-sulfonyloxaziridines has been realized, providing a novel access to sultams with up to 99% ee. Preliminary mechanistic insights revealed that the reaction proceeded through a N–O bond cleavage, dehydration, and the sequential asymmetric hydrogenation.
A novel palladium-catalyzedintramolecular reductive amination of ketones with the low nucleophilic sulfonamides has been developed in the presence of Bronsted acid, providing a wide range of chiral [gamma]-, [small delta]-,...
Chiral sulfonylamines can be efficiently synthesized in good yields by asymmetric hydrogenation of cyclic and acyclic N‐sulfonylimines co‐catalyzed by Pd/Zn(OTf)2 using hydrogen gas under ambient pressure.
Asymmetric Hydrogenation of Cyclic N-Sulfonylimines with Phosphine-Free Chiral Cationic Ru-MsDPEN Catalysts
作者:Fei Chen、Zhiwei Li、Yanmei He、Qinghua Fan
DOI:10.1002/cjoc.201090260
日期:2010.9
Phosphine‐free chiralcationic Ru/diamine complexes are effective catalysts for the asymmetrichydrogenation of a range of cyclic N‐sulfonylimines, affording chiral sultam derivatives with good to excellent enantioselectivity (up to 94% ee).