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)
Ni(II)/tBu-SMI-PHOX catalyzed enantioselective addition of arylboronic acids to cyclic N-sulfonyl aldimines
作者:Rui Sun、Zhongxuan Qiu、Guorui Cao、Dawei Teng
DOI:10.1016/j.tet.2020.131201
日期:2020.5
addition of arylboronic acids to cyclic N-sulfonyl aldimines is envisioned to afford excellent enantioselectivities (up to 99% ee) in high yields (up to 98%). This protocol offers new opportunities for the synthesis of chiral benzosultams containing a stereogenic tertiary carbon center. The highlights of this method include mild reaction conditions, the use of cheap metal catalyst and a wide substrate scope
设想了将有效的Ni(ClO 4)2 ·6H 2 O / SMI-PHOX催化的芳基硼酸对映选择性加成到环状N-磺酰基醛亚胺中,以高产率(高达98%)提供优异的对映选择性(高达99%ee)。 。该协议为合成含有立体异构叔碳中心的手性苯并舒坦提供了新的机会。该方法的亮点包括温和的反应条件,使用廉价的金属催化剂和广泛的底物范围。
Synthesis of chiral sultams via palladium-catalyzed intramolecular asymmetric reductive amination
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]-,...
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).
Chiral Iron Porphyrins Catalyze Enantioselective Intramolecular C(sp
<sup>3</sup>
)−H Bond Amination Upon Visible‐Light Irradiation
作者:Hua‐Hua Wang、Hui Shao、Guanglong Huang、Jianqiang Fan、Wai‐Pong To、Li Dang、Yungen Liu、Chi‐Ming Che
DOI:10.1002/anie.202218577
日期:——
An efficient method has been developed for the chiraliron porphyrin catalyzed transformation of aryl and arylsulfonyl azides into chiral indolines and sultams, respectively. The reaction proceeds upon visible light irradiation and with high yields and excellent enantioselectivities.