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题名: The enantioselective cyanosilylation of aldehydes on a chiral VO(Salen) complex encapsulated in SBA-16
作者: Yang, Hengquan1;  Zhang, Lei1;  Wang, Peng1;  Yang, Qihua1;  Li, Can1
通讯作者: 杨启华 ;  李灿
刊名: GREEN CHEMISTRY
发表日期: 2009
DOI: 10.1039/b815997a
卷: 11, 期:2, 页:257-264
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 506,503
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: A solid catalyst for enantioselective cyanosilylation of aldehydes was prepared by encapsulating a chiral vanadyl Salen complex [VO(Salen)] in the nanocage of SBA-16. After encapsulation, the pore entrance size of SBA-16 was finely tuned through a silylation method to confined the metal complex in the nanocage and allow the free diffusion of the reactants and products during the catalytic process. For the enantioselective cyanosilylation of benzyldehyde, the enantioselectivity of the solid catalyst can achieve as high as 90%. When alkanes such as pentane, hexane and heptane were used as solvents, VO( Salen) confined in the nanocage of SBA-16 exhibits higher enantioselectivity than its homogeneous counterpart. In halogenated alkanes, the enantioselectivity of VO (Salen) confined in the nanocage of SBA-16 is lower than that of the homogeneous catalyst. The different solvent effect for the solid catalyst from the homogeneous counterpart is probably due to the altered microenvironment of VO(Salen) encapsulated in the nanocage.
关键词[WOS]: ASYMMETRIC CYANOHYDRIN SYNTHESIS ;  SALEN COMPLEXES ;  O-ACETYLCYANOHYDRINS ;  HETEROGENEOUS CATALYSTS ;  TRIMETHYLSILYL CYANIDE ;  IMIDAZOLIUM ION ;  N-OXIDE ;  KETONES ;  SILICA ;  CARBON
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000263203500018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/101691
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Yang, Hengquan,Zhang, Lei,Wang, Peng,et al. The enantioselective cyanosilylation of aldehydes on a chiral VO(Salen) complex encapsulated in SBA-16[J]. GREEN CHEMISTRY,2009,11(2):257-264.
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