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
论文数: 0引用数: 0
h-index: 0
机构:CSIC, Inst Quim Organ Gen, Madrid 28006, Spain
Ayala, V
Corma, A
论文数: 0引用数: 0
h-index: 0
机构:CSIC, Inst Quim Organ Gen, Madrid 28006, Spain
Corma, A
Iglesias, M
论文数: 0引用数: 0
h-index: 0
机构:CSIC, Inst Quim Organ Gen, Madrid 28006, Spain
Iglesias, M
Sánchez, F
论文数: 0引用数: 0
h-index: 0
机构:CSIC, Inst Quim Organ Gen, Madrid 28006, Spain
Sánchez, F
机构:
[1] CSIC, Inst Quim Organ Gen, Madrid 28006, Spain
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.