Disulfonimide‐Catalyzed Asymmetric Reduction of
<i>N</i>
‐Alkyl Imines
作者:Vijay N. Wakchaure、Philip S. J. Kaib、Markus Leutzsch、Benjamin List
DOI:10.1002/anie.201504052
日期:2015.9.28
A chiral disulfonimide (DSI)‐catalyzedasymmetric reduction of N‐alkyl imines with Hantzsch esters as a hydrogen source in the presence of Boc2O has been developed. The reaction delivers Boc‐protectedN‐alkyl amines with excellent yields and enantioselectivity. The method tolerates a large variety of alkyl amines, thus illustrating potential for a general reductive cross‐coupling of ketones with diverse
Described herein are compounds of formula (I), related compositions, and their use, for example in the formation of α-amino acids or a precursor thereof such as an α-aminonitrile.
Local and Tunable n→π* Interactions Regulate Amide Isomerism in the Peptoid Backbone
作者:Benjamin C. Gorske、Brent L. Bastian、Grant D. Geske、Helen E. Blackwell
DOI:10.1021/ja071310l
日期:2007.7.1
We report that n→π* interactions are operative in peptoids and play a major role in controlling amide isomerism. These interactions can be tuned using α-chiral amide side chains known to promote peptoid folding. To our knowledge, this is the first report of n→π* interactions between amides in non-prolyl systems. Furthermore, we have characterized an n→π* interaction between backbone carbonyls and side
A compound having the general structure of Formula (I):
or a pharmaceutically acceptable salt, solvate, or ester thereof, is useful in treating diseases, disorders, or conditions such as obesity, metabolic disorders, addiction, diseases of the central nervous system, cardiovascular disorders, respiratory disorders, and gastrointestinal disorders.
Fast Racemisation of Chiral Amines and Alcohols by Using Cationic Half-Sandwich Ruthena- and Iridacycle Catalysts
作者:Thomas Jerphagnon、Arnaudâ J.â A. Gayet、Florian Berthiol、Vincent Ritleng、NatasÌa MrsÌicÌ、Auke Meetsma、Michel Pfeffer、Adriaanâ J. Minnaard、Benâ L. Feringa、Johannesâ G. deâ Vries
DOI:10.1002/chem.200902103
日期:2009.11.23
are highly active and efficient in the racemisation of chiralalcohols and amines. Upon activation with base, these complexes are able to selectively racemise alcohols, whereas the non‐activated complexes are selective catalysts for the racemisation of amines. We have applied the iridacycles in the DKR of racemic β‐chloroalcohols to produce chiral epoxides in a biphasic system in good yields and high