Chiral catalysts confined in porous hosts: 2. Catalysis
Chiral catalysts confined in porous hosts: 2. Catalysis
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DOI：
10.1016/s0021-9517(02)00155-0
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发表时间：
2003-07
影响因子：
7.3
通讯作者：
H. M. Hultman;M. Lang;I. Arends;U. Hanefeld;R. Sheldon;T. Maschmeyer
中科院分区：
文献类型：
--
作者：
H. M. Hultman;M. Lang;I. Arends;U. Hanefeld;R. Sheldon;T. Maschmeyer
研究了固定在MCM-41孔内和Aerosil 200表面的氨甲酰二铑催化剂的催化活性。在二甲基苯基硅烷与重氮乙酸甲基苯基酯的SiO2-H插入反应和苯乙烯与重氮乙酸乙酯和叔丁基酯的环丙烷化反应中测试催化剂。由于载体的空间限制，在对映选择性（硅氢化插入）和区域选择性（环丙烷化）的显着改善。
The catalytic activities of the dirhodium carboxamide catalysts immobilised in the pores of MCM-41 and on the surface of Aerosil 200 (see preceeding paper) have been investigated. The catalysts were tested in the SiH insertion reaction of dimethylphenylsilane with methyl phenyl diazoacetate and in the cyclopropanation reaction of styrene with ethyl and tert-butyl diazoacetate. Significant improvements in enantioselectivity (SiH insertion) and in regioselectivity (cyclopropanation) were induced due to the spatial confinement by the carrier.