Ir-catalyzed asymmetric hydrogenation of β-keto esters with chiral ferrocenyl P,N,N-ligands
作者:Xiu-Shuai Chen、Chuan-Jin Hou、Chao Qin、Hongzhu Liu、Yan-Jun Liu、De-Zhi Huang、Xiang-Ping Hu
DOI:10.1039/c7ra00472a
日期:——
The Ir-catalyzed asymmetrichydrogenation of β-keto esters with chiralferrocenylP,N,N-ligands has been developed. Under the optimized conditions, a wide range of β-keto esters were hydrogenated to afford the corresponding β-hydroxy esters in good to excellent enantioselectivities (up to 95% ee).
Iridium-catalyzed asymmetric hydrogenation of <font>β</font>-keto esters with f-amphox ligands
作者:Chao Qin、Xiu-Shuai Chen、Chuan-Jin Hou、Hongzhu Liu、Yan-Jun Liu、De-Zhi Huang、Xiang-Ping Hu
DOI:10.1080/00397911.2017.1414267
日期:2018.3.19
ABSTRACT The iridium-catalyzed asymmetric hydrogenation of β-keto esters with chiral tridentate P,N,N-ligands (f-amphox) has been developed. Under the optimized conditions, a wide range of β-keto esters can be hydrogenated smoothly, affording the corresponding β-hydroxy esters in good to excellent enantioselectivities (up to 95% ee). GRAPHICAL ABSTRACT
Chiral Bicyclic NHC/Cu Complexes for Catalytic Asymmetric Borylation of α,β-Unsaturated Esters
作者:Yuya Miwa、Takumi Kamimura、Kiyoaki Sato、Daichi Shishido、Kazuhiro Yoshida
DOI:10.1021/acs.joc.9b02096
日期:2019.11.1
The potential of using chiral bicyclic NHC ligands that exhibit modularity was investigated in the Cu-catalyzed asymmetric borylation reaction of α,β-unsaturatedesters. After screening for ligands and optimization of the reaction conditions, the corresponding products were afforded with good enantioselectivities (up to 85% ee).
Chiral Nitroarenes as Enantioselective Single-Electron-Transfer Oxidants for Carbene-Catalyzed Radical Reactions
作者:Hongling Wang、Yuhuang Wang、Xingkuan Chen、Chengli Mou、Shuyan Yu、Huifang Chai、Zhichao Jin、Yonggui Robin Chi
DOI:10.1021/acs.orglett.9b02736
日期:2019.9.20
A new class of chiral oxidants is developed. These readily accessible oxidants contain a nitro group for oxidation and a chiral sulfonamide moiety for stereoselectivity control. The chiral information from the oxidants can effectively transfer to the substrates in carbene-catalyzed β-hydroxylation of enals via single-electron-transfer radical processes. We expect these oxidants to find unique applications