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题名: Chiral copper(II)-Schiff base complexes as catalysts for asymmetric cyclopropanation of styrene
作者: Qiu, M;  Liu, GS;  Yao, XQ;  Guo, MY;  Pan, GZ;  Zheng, Z
关键词: chiral copper(II)-Schiff base ;  complex ;  asymmetric catalysis ;  styrene ;  cyclopropanation
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2001
卷: 22, 期:1, 页:77-80
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Twelve chiral copper (II)-Schiff base complexes, derived from (R)-(+)-2-amino-1,1-diaryl-1-propanol with substituted salicylaldehydes, were examined as a catalyst for asymmetric cyclopropanation of styrene with ethyl diazoacetate. It was found that the substituents at 3- and 5- positions of salicylaldehyde in the ligands had great effects on catalytic activity and enantioselectivity of the catalyst. The complex with strong electron-withdrawing group (NO2) at 5-position and the smallest stereo-hinder (H) at 3-position of salicytaidehyde showed highly catalytic activity and enantioselectivity, up to ee = 87.4% for trans and ee 82.8% for cis isomers respectively, and the ratio 39/61 of cis to trans isomers was obtained at 40 degreesC with 1,2-dichloroethane as solvent.
关键词[WOS]: ACIDS
语种: 英语
WOS记录号: WOS:000170358800021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138905
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

Recommended Citation:
Qiu, M,Liu, GS,Yao, XQ,et al. Chiral copper(II)-Schiff base complexes as catalysts for asymmetric cyclopropanation of styrene[J]. CHINESE JOURNAL OF CATALYSIS,2001,22(1):77-80.
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