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题名: Polymeric salen-Ti(IV) or V(V) complex catalyzed asymmetric synthesis of O-acetylcyanohydrins from KCN, Ac2O and aldehydes
作者: Huang, W;  Song, YM;  Wang, J;  Cao, GY;  Zheng, Z
关键词: O-acetyl cyanohydrins ;  recyclable polymeric salen-Ti(IV) complexes ;  polymeric salen-V(V) complexes ;  potassium cyanide ;  alde-hyde ;  asymmetric cyanation
刊名: TETRAHEDRON
发表日期: 2004-11-08
DOI: 10.1016/j.tet.2004.08.078
卷: 60, 期:46, 页:10469-10477
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Organic
研究领域[WOS]: Chemistry
英文摘要: Polymeric salen-Ti(IV) and V(V) complexes were employed in the enantioselective O-acetyl cyanation of aldehydes with potassium cyanide and acetic anhydride. The crosslinked polymeric salen-Ti(IV) catalyst exhibited good activities and enantioselectivities, up to 91 % ee with 99 % conversion was obtained at -20degreesC with 1 mol % of catalyst (based on bimetallic catalytic unit). Moreover, six consecutive recyclings with the easily recovered crosslinked polymeric catalyst showed no obvious decrease in either activity or enantioselectivity. Linear polymeric salen-V(V) catalyst showed good catalytic efficiency too, up to 94 % ee with 99 % conversion was obtained at -42degreesC with 5 mol % of catalyst. (C) 2004 Elsevier Ltd. All rights reserved.
关键词[WOS]: HIGHLY ENANTIOSELECTIVE RESOLUTION ;  CHIRAL (SALEN)TITANIUM COMPLEXES ;  SALEN COMPLEXES ;  TRIMETHYLSILYL CYANIDE ;  TERMINAL EPOXIDES ;  IONIC LIQUIDS ;  CYANOHYDRINS ;  CYANOSILYLATION ;  EPOXIDATION ;  KETONES
语种: 英语
WOS记录号: WOS:000224632300010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139280
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, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100864, Peoples R China

Recommended Citation:
Huang, W,Song, YM,Wang, J,et al. Polymeric salen-Ti(IV) or V(V) complex catalyzed asymmetric synthesis of O-acetylcyanohydrins from KCN, Ac2O and aldehydes[J]. TETRAHEDRON,2004,60(46):10469-10477.
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