63430-99-9Relevant academic research and scientific papers
Umpolung of Imines Enables Catalytic Asymmetric Regio-reversed [3+2] Cycloadditions of Iminoesters with Nitroolefins
Feng, Bin,Lu, Liang-Qiu,Chen, Jia-Rong,Feng, Guoqiang,He, Bin-Qing,Lu, Bin,Xiao, Wen-Jing
supporting information, p. 5888 - 5892 (2018/05/14)
A copper-catalyzed regio-reversed asymmetric [3+2] cycloaddition of iminoesters with nitroolefins is disclosed for the first time. This method enables the facile synthesis of polysubstituted chiral pyrrolidines bearing at least one chiral quaternary cente
Rh-catalyzed asymmetric hydrogenation of racemic aldimines via dynamic kinetic resolution
Fan, Dongyang,Lu, Jian,Liu, Yang,Zhang, Zhenfeng,Liu, Yangang,Zhang, Wanbin
, p. 5541 - 5547 (2016/08/05)
Catalyzed by a rhodium complex of P-stereogenic diphosphine ligand trichickenfootphos (TCFP), asymmetric hydrogenation of racemic aldimines via dynamic kinetic resolution has been realized for the preparation of chiral arylglycines with good yields and enantioselectivities.
X=Y-ZH Systems as Potential 1,3-Dipoles. Part 1. Background and Scope
Grigg, Ronald,Gunaratne, H. Q. Nimal,Kemp, James
, p. 41 - 46 (2007/10/02)
X=Y-ZH Systems are considered in general terms and divided into four classes according to the number of constituent atoms that possess lone-pair electrons.Those systems in which the central Y atom possesses a lone pair are shown to be capable of participa
Derecemization par protonation enantioselective. Application a un α-aminoacide, la phenylglycine
Duhamel, Lucette,Plaquevent, Jean-Christophe
, p. 75 - 83 (2007/10/02)
This work describes the application of deracemization by enantioselective protonation to α-aminoacid derivatives.Esters of phenylglycine are readly converted into Schiff bases.Melanation of the latter by a lithium amide, followed by protonation by a chiral acid, leads to the optically active starting materials (e.e. as high as 70percent).Chiral acids can easily be retrieved after protonation with excellent yields and conservation of enantiomeric purity.A mechanism responsible for the asymmetric induction is suggested by means of a study of the parameters modifying the selectivity, such as the nature of protecting groups, chiral acid, and lithium amide.
