METHOD FOR THE CATALYTIC REDUCTION OF ACID CHLORIDES AND IMIDOYL CHLORIDES
申请人:Nikonov Georgii
公开号:US20140228579A1
公开(公告)日:2014-08-14
The present application relates to methods for the catalytic reduction of acid chlorides and/or imidoyl chlorides. The methods comprise reacting the acid chloride or imidoyl chloride with a silane reducing agent in the presence of a catalyst such as [Cp(Pr
i
3
P)Ru(NCMe)
2
]
+
[PF
6
]
−
.
Asymmetric hydrogenation of N-alkyl and N-aryl ketimines using chiral cationic Ru(diamine) complexes as catalysts: the counteranion and solvent effects, and substrate scope
作者:Fei Chen、Ziyuan Ding、Yanmei He、Jie Qin、Tianli Wang、Qing-Hua Fan
DOI:10.1016/j.tet.2012.03.019
日期:2012.7
Asymmetrichydrogenation of N-alkyl and N-aryl ketimines catalyzed by chiralcationic η6-arene-(N-monosulfonylated diamine) Ru(II) complexes has been investigated. Strong counteranion and solvent effects on the enantioselectivity were observed. The ruthenium catalyst bearing non-coordinating BArF− anion was found to be particularly effective for the hydrogenation of acyclic and exocyclic N-alkyl ketimines
Asymmetric Hydrogenation of N-Alkyl Ketimines with Phosphine-Free, Chiral, Cationic Ru-MsDPEN Catalysts
作者:Fei Chen、Tianli Wang、Yanmei He、Ziyuan Ding、Zhiwei Li、Lijin Xu、Qing-Hua Fan
DOI:10.1002/chem.201002846
日期:2011.1.24
(Solvent) free and easy: A phosphine‐free, chiral, cationicRu–MsDPEN complex [(S,S)‐1] is found to be an efficient catalyst for the enantioselective hydrogenation of a range of often‐problematic N‐alkyl ketimines (see scheme). This new method provides a more practical and greener synthetic approach to optically active amines, particularly N‐alkyl amines, such as Sertraline.
substituents at C(6) on irradiation are believed to undergo ring opening stereospecifically affording a mixture of two configurationally isomeric diene-ketenes (and descendents thereof)- Exceptions are generally found for those dienones with one C and one O substituent or even with two C substituents, if one of them carries a polar group at a site able to interact through space with the ring CO group. In these
Enantioselective reduction of <i>N</i>-alkyl ketimines with frustrated Lewis pair catalysis using chiral borenium ions
作者:Dan M. Mercea、Michael G. Howlett、Adam D. Piascik、Daniel J. Scott、Alan Steven、Andrew E. Ashley、Matthew J. Fuchter
DOI:10.1039/c9cc02900a
日期:——
Enantioselective reduction of ketimines was demonstrated using chiral N-heterocyclic carbene (NHC)-stabilised borenium ions in frustratedLewispair catalysis. High levels of enantioselectivity were achieved for substrates featuring secondary N-alkyl substituents. Comparative reactivity and mechanistic studies identify key determinants required to achieve useful enantioselectivity and represent a step