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题名: Synthesis and structural characterization of (pyrazolyl)alkenyl Fischer carbene complexes of chromium and tungsten
作者: Gu, KC;  Chen, JZ;  Zheng, ZY;  Wu, SZ;  Wu, XW;  Han, XW;  Yu, ZK
通讯作者: 余正坤
关键词: Fischer carbene ;  pyrazole ;  Michael addition ;  chromium ;  Tungsten
刊名: POLYHEDRON
发表日期: 2005-01-06
DOI: 10.1016/j.poly.2004.11.012
卷: 24, 期:1, 页:173-180
收录类别: SCI
文章类型: Article
部门归属: 2,5
项目归属: 203,502
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Inorganic & Nuclear ;  Crystallography
研究领域[WOS]: Chemistry ;  Crystallography
英文摘要: Michael addition of substituted pyrazoles 2 to 1-alkynyl Fischer carbene complexes (CO)(5)M=C(OEt)(CdropCPh) (1) (a, M = Cr and b M = W) afforded (pyrazolyl)alkenyl Fischer carbene complexes (CO)(5)M=C(OEt)(CH=C(R(1)R(2)R(3)pz)Ph) (R(1)R(2)R(3)pz = pyrazolyl) 3 (M = Cr) and 4 (M = W), respectively, with an exclusive (E)-configuration in mild to excellent yields. The reaction of la and 3,5-dimethylpyrazole (2b) was monitored to demonstrate the formation and decomposition of complex 3b by H-1 NMR measurements in CDCl3 at 23degreesC. Complexes 3 and 4 were characterized with H-1, C-13{H-1} NMR, IR spectroscopies and elemental analysis. When the substituted pyrazoles were 3-methylpyrazole (2a) and 3,5-di-tert-butylpyrazole (2d), molecular structures of the corresponding (pyrazolyl)alkenyl Fischer carbene complexes 3a and 4d were characterized by X-ray crystallographic study. (C) 2004 Elsevier Ltd. All rights reserved.
关键词[WOS]: TRANSITION-METAL-COMPLEXES ;  ORGANIC SYNTHESES ;  ALKYNYLCARBENE COMPLEXES ;  ANNULATION REACTIONS ;  MICHAEL ADDITION ;  TRIPLE BOND ;  IMINES ;  LIGAND ;  STEREOCHEMISTRY ;  CYCLOADDITION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000226542200017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/93059
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, Liaoning, Peoples R China

Recommended Citation:
Gu, KC,Chen, JZ,Zheng, ZY,et al. Synthesis and structural characterization of (pyrazolyl)alkenyl Fischer carbene complexes of chromium and tungsten[J]. POLYHEDRON,2005,24(1):173-180.
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