Routes to enantioenriched amines are outlined that employ reductive amination and carbanion addition methods. The strategies require either one or two reaction steps from prochiral carbonyl compounds for the synthesis of the corresponding chiral primary amines.
[EN] SYNTHESIS OF AMINE STEREOISOMERS<br/>[FR] SYNTHESE DE STEREOISOMERES D'AMINES
申请人:INTERNAT UNIVERSITY BREMEN GMB
公开号:WO2006030017A1
公开(公告)日:2006-03-23
The invention relates to methods for producing secondary and tertiary amine diastereomers and corresponding enantiopure or enantioenriched primary or secondary chiral amine products.
这项发明涉及生产二级和三级胺对映异构体以及相应的对映纯或对映富集的一级或二级手性胺产品的方法。
Reversal of Diastereofacial Selectivity in Hydride Reductions of <i>N</i>-<i>tert</i>-Butanesulfinyl Imines
作者:John T. Colyer、Neil G. Andersen、Jason S. Tedrow、Troy S. Soukup、Margaret M. Faul
DOI:10.1021/jo0609834
日期:2006.9.1
same sulfinyl imine starting materials and changing the reductant to L-Selectride, the stereoselectivity could be efficiently reversed to afford the opposite product diastereomer in high yield and selectivity.
Sequential Reductive Amination-Hydrogenolysis: A One-Pot Synthesis of Challenging Chiral Primary Amines
作者:Thomas C. Nugent、Daniela E. Negru、Mohamed El-Shazly、Dan Hu、Abdul Sadiq、Ahtaram Bibi、M. Naveed Umar
DOI:10.1002/adsc.201100250
日期:2011.8
Difficult-to-access chiralprimaryamines were formed in good to high yield and ee using a rare example of a one-potsynthesis from prochiral ketones (sequentialreductive amination-hydrogenloysis). As a highlight we also demonstrate a one-potreductive amination-hydrogenolysis-reductive amination (five reactions) of ortho-methoxyacetophenone resulting in the chiral diamine 1-(2-methoxyphenyl)ethy
Evolution of Titanium(IV) Alkoxides and Raney Nickel for Asymmetric Reductive Amination of Prochiral Aliphatic Ketones
作者:Thomas C. Nugent、Vijay N. Wakchaure、Abhijit K. Ghosh、Rashmi R. Mohanty
DOI:10.1021/ol051909v
日期:2005.10.1
[reaction: see text] A new method for the one-pot asymmetricreductive amination of prochiral aliphatic ketones has been developed. The previously unexplored reagent combination of Ti(O(i)Pr)(4)/Raney Ni/H(2) in the presence of (R)- or (S)-alpha-methylbenzylamine provides good to excellent yield (76-90%) and diastereomeric excess (72-98%). The second step, hydrogenolysis, provides the corresponding
[反应:见正文]已经开发了一种用于前手性脂肪族酮的一锅式不对称还原胺化的新方法。Ti(O(i)Pr)(4)/ Raney Ni / H(2)在(R)-或(S)-α-甲基苄胺的存在下未经探索的试剂组合可提供良好至极好的收率(76-90 %)和非对映异构体过量(72-98%)。第二步是氢解,以高收率(88-93%)提供了相应的伯胺,并且毫不妥协的对映体过量。
Asymmetric Intermolecular Hydroamination of Unactivated Alkenes with Simple Amines
作者:Alexander L. Reznichenko、Hiep N. Nguyen、Kai C. Hultzsch
DOI:10.1002/anie.201004570
日期:2010.11.15
A hard nut to crack: The asymmetric intermolecular Markovnikov addition of simple amines to unactivatedalkenes can be achieved utilizing binaphtholate rare‐earth‐metal catalysts with up to 61 % ee and 73 % de in the case where R2 contains a stereogenic center.