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.
'Salen' along: The iridium(III)–salen complex 1 efficiently catalyzes the title reaction of 2‐ethylbenzenesulfonyl azides to give five‐membered sultams with high enantioselectivity. Other 2‐alkyl‐substitued substrates lead to five‐ and six‐membered sultams with high enantioselectivity; the regioselectivity depends upon the substrate and the catalyst used. EDG=electron‐donating group.