[EN] KINETIC RESOLUTION OF CHIRAL AMINES<br/>[FR] RÉSOLUTION CINÉTIQUE D'AMINES CHIRALES
申请人:ETH ZUERICH
公开号:WO2013007371A2
公开(公告)日:2013-01-17
The present invention refers to a method for the kinetic resolution of a chiral primary or secondary amine by treating the amine with a chiral, hydroxamic acid derived reagent of the formula (I). These chiral reagents are particularly useful for the kinetic resolution of cyclic amines and may be generated in situ in the presence of an N-heterocyclic carbene, thus allowing for a catalytic reaction.
Catalytic Kinetic Resolution of Cyclic Secondary Amines
作者:Michael Binanzer、Sheng-Ying Hsieh、Jeffrey W. Bode
DOI:10.1021/ja209472h
日期:2011.12.14
The catalytic resolution of racemic cyclic amines has been achieved by an enantioselective amidation reaction featuring an achiral N-heterocyclic carbene catalyst and a new chiral hydroxamic acid cocatalyst working in concert. The reactions proceed at room temperature, do not generate nonvolatile byproducts, and provide enantioenriched amines by aqueous extraction.
Determination of the Absolute Configuration of Cyclic Amines with Bode’s Chiral Hydroxamic Esters Using the Competing Enantioselective Conversion Method
作者:Alexander Burtea、Scott D. Rychnovsky
DOI:10.1021/acs.orglett.7b01748
日期:2017.8.18
strategy has been extended to cyclic amines. The basis for the CEC approach is the use of two complementary, enantioselective reactions to determine the configuration of the enantiopure substrate. Bode’s chiralacylated hydroxamic acids are very effective enantioselective acylating agents for a variety of amines. Pseudoenantiomers of these acyl-transfer reagents were prepared and demonstrated to react with
(4+3) Annulation of Donor‐Acceptor Cyclopropanes and Azadienes: Highly Stereoselective Synthesis of Azepanones
作者:Stefano Nicolai、Jérôme Waser
DOI:10.1002/anie.202209006
日期:2022.9.5
Azepanones are important and widespread seven-membered heterocycles, but their synthesis is challenging. A convergent method to access these scaffolds was developed relying on a (4+3) annulation reaction of azadienes and donor-acceptor cyclopropanes. Good to excellent yields and high diastereoselectivity were achieved using Yb(OTf)3 as the catalyst. Asymmetric induction was possible with Cu(OTf)2 in