The Thorpe-Ingold Effect in Cyclic Imides. Part III
作者:Zbigniew Czarnocki、Michal Pawlowski、Krystyna Wojtasiewicz、Jan K. Maurin、Andrzej Leniewski、Dariusz Blachut
DOI:10.3987/com-07-11047
日期:——
Synthesis of Chiral γ-Lactams via in Situ Elimination/Iridium-Catalyzed Asymmetric Hydrogenation of Racemic γ-Hydroxy γ-Lactams
作者:Qianjia Yuan、Delong Liu、Wanbin Zhang
DOI:10.1021/acs.orglett.7b00651
日期:2017.4.7
Chiral γ-lactams have been synthesized in excellent yields and enantioselectivities (up to 99% yield and 96% ee) from easily accessible racemic γ-hydroxy γ-lactams via an iridium-phosphoramidite catalyzed asymmetric hydrogenation. The reaction was designed based on insight into the reaction mechanism demonstrated in previous work and can be carried out at a reduced catalyst loading of 0.1 mol % on