Helical Poly(quinoxaline-2,3-diyl)s Bearing Metal-Binding Sites as Polymer-Based Chiral Ligands for Asymmetric Catalysis

被引：170

作者：

Yamamoto, Takeshi ^{[1
]}

Suginome, Michinori ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Synthet Chem & Biol Chem, Nishikyo Ku, Kyoto 6158510, Japan

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2009年 / 48卷 / 03期

关键词：

asymmetric catalysis; block copolymers; chiral ligands; helical structures; hydrosilylation; SENSE-SELECTIVE POLYMERIZATION; OPTICALLY-ACTIVE POLYMERS; SCREW-SENSE; MACROMOLECULAR HELICITY; MEDIATED POLYMERIZATION; ACHIRAL ISOCYANIDES; COMPLEXES; 1,2-DIISOCYANOBENZENES; CONFORMATION; WATER;

D O I：

10.1002/anie.200803719

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Living it up: Helical polyquinoxalines with single and multiple metal-binding sites, prepared by living polymerization of o-diisocyanobenzenes, are used in the asymmetric hydrosilylation of styrenes, resulting in comparable enantioselectivities to those obtained by low-molecular-weight catalyst systems (up to 87% ee, stereochemistry was determined by a chiral initiator) and a turnover number of almost 1000. (Chemical Equation Presented). © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.

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收藏

页码：539 / 542

页数：4

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