Assembling a Hybrid Pd Catalyst from a Chiral Anionic Co
<sup>III</sup>
Complex and Ligand for Asymmetric C(sp
<sup>3</sup>
)–H Functionalization
作者:Hua‐Jie Jiang、Xiu‐Mei Zhong、Jie Yu、Ying Zhang、Xinhao Zhang、Yun‐Dong Wu、Liu‐Zhu Gong
DOI:10.1002/anie.201812426
日期:2019.2.4
An unusual hybrid palladiumcatalyst containing an anionic chiral CoIII complex and a chiral phosphoramidite ligand shows a high capacity for catalyzing asymmetric thioamide‐directed C(sp3)−H arylation and delivers excellent yield and enantioselectivity (up to 99 % yield, 99 % ee). Significant synergy between the chiral ligand and the anion in terms of stereochemical control was observed. Mechanistic
Access to chiral γ-butenolides <i>via</i> palladium-catalyzed asymmetric allylic C–H alkylation of 1,4-dienes
作者:Zhen-Yao Dai、Pu-Sheng Wang、Liu-Zhu Gong
DOI:10.1039/d1cc02295d
日期:——
Asymmetric allylic C–H alkylation of 1,4-pentadienes with α-angelica lactones has been developed by tri-axial phosphoramidite-palladium catalysis. This reaction can tolerate a range of functional groups under mild conditions, furnishing versatile chiral γ,γ-disubstituted butenolides in high yields with good to high levels of stereoselectivity.
已通过三轴亚磷酰胺-钯催化开发了 1,4-戊二烯与 α-当归内酯的不对称烯丙基 C - H 烷基化反应。该反应可以在温和条件下耐受一系列官能团,以高产率提供多功能手性 γ,γ-二取代丁烯内酯,具有良好到高水平的立体选择性。
Asymmetric synthesis catalyst based on chiral brsnsted acid and method of asymmetric synthesis with the catalyst
申请人:Akiyama Takahiko
公开号:US20060276329A1
公开(公告)日:2006-12-07
A compound usable as an asymmetric synthesis catalyst which can be easily synthesized without using any metal such as a lanthanoid group element; a method of asymmetric synthesis with the compound; and a chiral compound obtained by the asymmetric synthesis method. A Broensted acid is used as a catalyst in asymmetric synthesis, the chiral Broensted acid being represented by formula (1) below or formula (3) below. The asymmetric synthesis method employs the catalyst. Asymmetric synthesis with the catalyst gives a chiral compound.