Synthesis of Nitrogenated Heterocycles by Asymmetric Transfer Hydrogenation of <i>N</i>-(<i>tert</i>-Butylsulfinyl)haloimines
作者:Óscar Pablo、David Guijarro、Miguel Yus
DOI:10.1021/jo4014386
日期:2013.9.20
Highly optically enriched, protected, nitrogenated heterocycles with different ring sizes have been synthesized by a very efficient methodology consisting of the asymmetrictransferhydrogenation of N-(tert-butylsulfinyl)haloimines followed by treatment with a base to promote an intramolecular nucleophilic substitution process. N-Protected aziridines, pyrrolidines, piperidines, and azepanes bearing
Zinc‐Catalyzed Asymmetric Hydrosilylation of Cyclic Imines: Synthesis of Chiral 2‐Aryl‐Substituted Pyrrolidines as Pharmaceutical Building Blocks
作者:Izabela Węglarz、Karol Michalak、Jacek Mlynarski
DOI:10.1002/adsc.202001043
日期:2021.3.2
cyclic imines promoted by a chiral zinc complex is reported. In situ generated zinc‐ProPhenol complex with silane afforded pharmaceutically relevant enantioenriched 2‐aryl‐substituted pyrrolidines in high yields and with excellent enantioselectivities (up to 99% ee). The synthetic utility of presented methodology is demonstrated in an efficient synthesis of the corresponding chiral cyclic amines, being pharmaceutical
Reactions in Organic Synthesis Abstract Catalyzed by the complex generated in situ from iridium and the chiral ferrocene ligand, tert-butyl (4-oxo-4-arylbutyl)carbamate substrates were deprotected and then reductively cyclised to form 2-substituted arylpyrrolidines in a one-pot manner, in which the intramolecular reductive amination was the key step. A range of chiral 2-substituted arylpyrrolidines were
[EN] PROCESS FOR THE PREPARATION OF (S)-NETARSUDIL, ITS SALTS & POLYMORPHS<br/>[FR] PROCÉDÉ DE PRÉPARATION DE (S)-NÉTARSUDIL, SES SELS ET POLYMORPHES
申请人:MICRO LABS LTD
公开号:WO2021001713A1
公开(公告)日:2021-01-07
The present invention relates to a process for the preparation of (S)-Netarsudil or its pharmaceutically acceptable salts using novel intermediates. The present invention further provides novel salts, novel intermediates and novel polymorphic forms of the (S)-Netarsudil salts and process for the preparation of the same.
Asymmetric synthesis of 2-arylpyrrolidines starting from γ-chloro N-(tert-butanesulfinyl)ketimines
作者:Erika Leemans、Sven Mangelinckx、Norbert De Kimpe
DOI:10.1039/b925209f
日期:——
The enantioselective reductive cyclization of gamma-chloro N-(tert-butanesulfinyl)ketimines towards the short and efficient synthesis of (S)- and (R)-2-arylpyrrolidines (ee >99%) is described for the first time by treatment with LiBEt(3)H and subsequent acid deprotection.