合成了空气/水分稳定,晶体和可储存的手性水杨基恶唑啉基氧化(V)配合物,并公开了其在氢化硅烷作为氢化物源的情况下催化不对称还原酮亚胺的催化应用。获得了广泛的底物范围,高收率和出色的对映选择性(最高99%)。此外,对映体纯α-氨基酯,γ-和δ-内酰胺以及异吲哚啉酮的合成也已使用该方法进行。最后,该方法已应用于具有药物相关性的合成靶标,例如R -(+)-沙丁胺碱和R -(+)-crispine A.
Enantioselective Hydrosilylation of Imines Catalyzed by Chiral Zinc Acetate Complexes
作者:Agata Bezłada、Marcin Szewczyk、Jacek Mlynarski
DOI:10.1021/acs.joc.5b02613
日期:2016.1.4
A series of zinc acetate complexes with optically pure diphenylethanediamine (DPEDA)-derived ligands have been employed as enantioselectivecatalyst for the hydrosilylation of various imines. High control of stereoselectivity (up to 97% ee) and excellent yields (up to 96%) were gained for a broad range of N-phosphinoylimines by using (R,R)-N,N′-dibenzyl-1,2-diphenylethane-1,2-diamine. This is the first
A New Phosphine-Amine-Oxazoline Ligand for Ru-Catalyzed Asymmetric Hydrogenation of<i>N</i>-Phosphinylimines
作者:Xiaochen Ma、Lin Qiao、Guixia Liu、Zheng Huang
DOI:10.1002/cjoc.201800343
日期:2018.12
A series of chiral phosphine‐amine‐oxazoline (PAO) ligands with an NH moiety were synthesized and applied to the ruthenium‐catalyzed asymmetric hydrogenation of N‐phosphinylimines. The ligand bearing phenyl groups at the phosphorus moiety and isopropyl at the oxazoline moiety exhibits good activity and excellent enantioselectivity (up to 99% ee). This catalytic system provides an efficient and mild
Developing Ru-Catalysts for Asymmetric Transfer Hydrogenation of Acyclic Imines
作者:Dongxu He、Chen Xu、Xiangyou Xing
DOI:10.1021/acs.orglett.2c03385
日期:2022.11.18
Asymmetric transferhydrogenation (ATH) of acyclic imines has been rarely reported by using Ru-based catalysts. In this manuscript, employing Ru-catalysts with minimal stereogenicity in combination with formic acid/triethylamine as the hydrogen donor enables a highly efficient ATH of N-diphenylphosphinyl acyclic imines. These substrates that include various aryl alkyl and heteroaryl alkylsubstituted imines
使用 Ru 基催化剂很少报道无环亚胺的不对称转移氢化 (ATH)。在这份手稿中,使用具有最小立体异构性的 Ru 催化剂与甲酸/三乙胺作为氢供体相结合,可以实现N-二苯基膦基无环亚胺的高效 ATH 。这些包含各种芳基烷基和杂芳基烷基取代亚胺的底物都与该催化体系相容,并以优异的对映体过量 (ee's) 和产率获得相应的还原胺。