Asymmetric epoxidation of styrene on the heterogenized chiral salen complexes prepared from organo-functionalized mesoporous materials

被引：64
作者：
Park, DW [1 ]
Choi, SD
Choi, SJ
Lee, CY
Kim, GJ
机构：
[1] Inha Univ, Dept Chem Engn, Inchon 402751, South Korea
[2] Inha Tech Coll, Dept Ind Chem, Inchon 402752, South Korea
来源：
CATALYSIS LETTERS | 2002年 / 78卷 / 1-4期
关键词：
mercaptopropyltrimethoxysilane; MCM-41; salen; epoxidation; immobilization;
D O I：
10.1023/A:1014945926583
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：
Organosilane-modified mesoporous materials have been prepared under mild and acidic conditions by a solvent evaporation method using C(16)TMABr surfactant as a template. The mesoporous samples synthesized in ethanol solvent by using this evaporation method showed a fully disordered pore system, but those obtained under hydrothermal conditions had highly ordered pores. The chiral salen Mn(Ill) complexes were immobilized on these organosilane-functionalized mesoporous silicas by a grafting method. The catalysts used in the asymmetric epoxidation of styrene and cis-stilbene and the effect of different mesoporous structures on the reactivity was investigated. Similar enantioselectivities were observed by using these heterogenized salen complexes as compared with reaction under homogeneous conditions.
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收藏
页码：145 / 151
页数：7
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