Electrostatic Repulsion and Hydrogen-Bonding Interactions in a Simple<i>N</i>-Aryl-<scp>L</scp>-valinamide Organocatalyst Control the Stereoselectivity in Asymmetric Aldol Reactions
作者:Yuya Tanimura、Kenji Yasunaga、Kaori Ishimaru
DOI:10.1002/ejoc.201301138
日期:2013.10
A novel stereocontrol method for asymmetric aldol reactions of aldehydes with ketones is described. The stereoselectivity of the products is controlled by the electrostaticrepulsion and hydrogen-bonding interactions of an N-aryl-L-valinamide catalyst. The use of this catalyst in a cross-aldol reaction allows easy access to bioactive 3-cyclohexanone-3-hydroxy-2-oxindole with excellent diastereo- (syn/anti
Processes for forming amide bonds and compositions related thereto
申请人:Liebeskind Lanny S.
公开号:US08921599B2
公开(公告)日:2014-12-30
The disclosure relates to methods for producing amide bonds and reagents related thereto. In some embodiments, the disclosure relates to methods of producing an amide comprising mixing an O-silylated thionoester and an amine under conditions such that an amide is formed. In another embodiment, the disclosure relates to mixing a thiolacid, a silylating agent, and an amine under conditions such that an amide is formed.
Inducing Enantioselectivity in a Dynamic Catalyst by Supramolecular Interlocking
作者:Jan Felix Scholtes、Oliver Trapp
DOI:10.1002/anie.201901175
日期:2019.5.6
a supramolecular assembly, where the axial orientation of the biphenyl ligand backbone is governed by the chirality of the amino acid moieties. Stereoinduction during catalysis is decoupled from this process and occurs as an immediate consequence of the emergent behavior of the ligands. This supramolecular system is very robust and has the potential to be adopted for other ligand designs in enantioselective
Processes For Forming Amide Bonds And Compositions Related Thereto
申请人:Liebeskind Lanny S.
公开号:US20120107902A1
公开(公告)日:2012-05-03
The disclosure relates to methods for producing amide bonds and reagents related thereto. In some embodiments, the disclosure relates to methods of producing an amide comprising mixing an O-silylated thionoester and an amine under conditions such that an amide is formed. In another embodiment, the disclosure relates to mixing a thiolacid, a silylating agent, and an amine under conditions such that an amide is formed.
PROCESSES FOR FORMING AMIDE BONDS AND COMPOSITIONS RELATED THERETO
申请人:EMORY UNIVERSITY
公开号:US20150315129A1
公开(公告)日:2015-11-05
The disclosure relates to methods for producing amide bonds and reagents related thereto. In some embodiments, the disclosure relates to methods of producing an amide comprising mixing an O-silylated thionoester and an amine under conditions such that an amide is formed. In another embodiment, the disclosure relates to mixing a thiolacid, a silylating agent, and an amine under conditions such that an amide is formed.