Bidentate Chiral Bis(imidazolium)‐Based Halogen‐Bond Donors: Synthesis and Applications in Enantioselective Recognition and Catalysis
作者:Revannath L. Sutar、Elric Engelage、Raphael Stoll、Stefan M. Huber
DOI:10.1002/anie.201915931
日期:2020.4.20
donor with both enantiomers and indicate that the chiral recognition is based on a different spatial orientation of the Lewis bases in the halogen-bonded complexes. In addition, moderate enantioselectivity is achieved in a Mukaiyama aldolreaction with a preorganized variant of the chiral halogen-bond donor. This represents the first case in which asymmetric induction was realized with a pure halogen-bond
ENANTIOSELECTIVE REACTIONS CATALYZED BY CHIRAL TRIAZOLIUM SALTS
申请人:Bode Jeffrey
公开号:US20100210452A1
公开(公告)日:2010-08-19
This invention provides a convenient method for converting imines and other electrophiles into heterocyclic ring systems. The process does not require the use of metallic reagents, and is catalyzed by an organic heterocyclic carbene catalyst. Accordingly, it produces the desired compounds without the concomitant production of a large volume of metallic waste. Chiral heterocyclic carbene catalysts of the invention and methods of using these catalysts produce chiral heterocycles in high enantiomeric and diastereomeric excess.