Enantioselective Friedel–Crafts alkylation of indole derivatives catalyzed by new Yb(OTf)<sub>3</sub>-pyridylalkylamine complexes as chiral Lewis acids
作者:Guillaume Grach、Aurelia Dinut、Sylvain Marque、Jérôme Marrot、Richard Gil、Damien Prim
DOI:10.1039/c0ob00461h
日期:——
New Yb(OTf)3-pyridylalkylamine complexes have been employed as chiral Lewis acids in the enantioselective FriedelâCrafts alkylation of indole derivatives with trifluoropyruvates. The influence of the substituents as well as the configuration of the ligands have been studied and allowed us to reach enantiomeric excesses up to 83%.
Pyridine- and Quinoline-Based Gold(III) Complexes: Synthesis, Characterization, and Application
作者:Ann Christin Reiersølmoen、Anne Fiksdahl
DOI:10.1002/ejoc.202000139
日期:2020.5.22
Gold(III) complexes of a series of polydentate pyridine‐ and quinoline‐based ligands are prepared. The coordination ability of the pyridine and quinoline nitrogen atoms are different. All complexes are catalytically active in cyclopropanation of propargyl ester and styrene and outperform KAuCl4. Pyridine‐N decoordination may be a crucial step for generation of catalytic activity.