Mesoporous MCM41-heterogenised (salen)Mn and Cu complexes as effective catalysts for oxidation of sulfides to sulfoxides -: Isolation of a stable supported Mn(V)=O complex, responsible of the catalytic activity

被引:77
作者
Ayala, V
Corma, A
Iglesias, M
Sánchez, F
机构
[1] CSIC, Inst Quim Organ Gen, Madrid 28006, Spain
[2] Univ Politecn Valencia, CSIC, Inst Tecnol Quim, Valencia 46022, Spain
[3] CSIC, Inst Ciencia Mat Madrid, Madrid 28049, Spain
关键词
immobilised salen; heterogenisation; sulfide oxidation; manganese; copper;
D O I
10.1016/j.molcata.2004.07.010
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
Chiral salen manganese and copper complexes immobilised on mesoporous silica supports (silica, MCM-41) have been investigated as catalysts in the sulfide to sulfoxide oxidation; the supported catalysts are highly suited to reactions leading to high yields and high sulfoxide/sulfone selectivity while moderate asymmetric induction (up to 30%) was observed. The presence of stable manganyl [Mn(V)=O] complexes into support channels have been established, being responsible for catalytic activity. The recovery and reusability of heterogenised Mn- and Cu-catalysts have been studied. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:201 / 208
页数:8
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