Design and synthesis of a tridentate ligand for asymmetric bifunctional catalysis
作者:Virginie Casarotto、Zhongtao Li、Julie Boucau、Yun-Ming Lin
DOI:10.1016/j.tetlet.2007.05.130
日期:2007.7
Covalent attachment of a quinine moiety to a Schiff base ligand through an ester linkage generates a novel tridentate ligand that gives a new Lewis acid-Lewis base (LA-LB*) bifunctional catalyst having a mixture of the LA configurations. The LB*-dependent asymmetric bifunctional catalysis was demonstrated using the addition of diethylzinc to 2-methoxybenzaldehyde as a test reaction and the substrate scope of the new catalyst was illustrated using aromatic aldehydes. (C) 2007 Elsevier Ltd. All rights reserved.
New solid-phase catalysts for asymmetric synthesis: cross-linked polymers containing a chiral Schiff base-zinc complex
作者:Shinichi Itsuno、Yoshiki Sakurai、Koichi Ito、Toshihiro Maruyama、Seiichi Nakahama、J. M. J. Frechet
DOI:10.1021/jo00288a051
日期:1990.1
Synthesis of New Chiral Catalysts, Isoquinuclidinylmethanethiols, for the Enantioselective Addition of Diethylzinc to Aryl Aldehydes
作者:Hiroshi Hongo、Hiroto Nakano、Kazuto Iwasa
DOI:10.3987/com-97-s10
日期:——
Synthesis of New Chiral Catalysts, Isoquinuclidinylmethanols, for the Enantioselective Addition of Diethylzinc to Aryl Aldehydes
作者:Hiroshi Hongo、Hiroto Nakano、Kazuto Iwasa
DOI:10.3987/com-96-s42
日期:——
Enantioselective addition of diethylzinc to aldehydes catalyzed by polymer-supported chiral amino alcohols. Evidence for a two zinc species mechanism