Asymmetric oxidation of sulfides with H2O2 catalyzed by titanium complexes with aminoalcohol derived Schiff bases

被引：50

作者：

Bryliakov, Konstantin P. ^{[1
]}

Talsi, EvIrenii P. ^{[1
]}

机构：

[1] Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2007年 / 264卷 / 1-2期

基金：

俄罗斯基础研究基金会;

关键词：

asymmetric catalysis; H2O2; sulfoxides; chiral Schiff bases; titanium complexes;

D O I：

10.1016/j.molcata.2006.09.038

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sulfoxidation catalysts generated in situ from titanium(IV) isopropoxide and enantiopure Schiff bases promote the enantioselective oxidation of alkyl aryl sulfides to the corresponding sulfoxides at low catalyst loadings (< 1 mol%), 30% aqueous hydrogen peroxide being the terminal oxidant. Upon screening of several ligands derived from beta-aminoalcohols and salicylaldehydes, a catalyst affording sulfoxides with over 90% chemoselectivity and up to 60% ee was found, and the kinetics of the catalytic reaction was analyzed by H-1 NMR. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：280 / 287

页数：8

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