Thiosemicarbazone copper complexes as competent catalysts for olefin cyclopropanations

被引：30
作者：
Youssef, Nabil S. [3 ]
El-Seidy, Ahmed M. A. [3 ]
Schiavoni, Marco [1 ,2 ]
Castano, Brunilde [1 ,2 ]
Ragaini, Fabio [1 ,2 ]
Gallo, Emma [1 ,2 ]
Caselli, Alessandro [1 ,2 ]
机构：
[1] Univ Milan, Dipartimento Chim, I-20133 Milan, Italy
[2] CNR, ISTM, I-20133 Milan, Italy
[3] Natl Res Ctr, Dept Inorgan Chem, Giza, Egypt
来源：
JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2012年 / 714卷
关键词：
Schiff bases; Copper complexes; Cyclopropanation reactions; Homogeneous catalysis; Thiosemicarbazone; ASYMMETRIC CYCLOPROPANATION; METAL-COMPLEXES; ENANTIOSELECTIVE CYCLOPROPANATION; SPECTROSCOPIC CHARACTERIZATION; CRYSTAL-STRUCTURE; CU(I) COMPLEXES; DIAZO-COMPOUNDS; LIGANDS; COORDINATION; ALKENES;
D O I：
10.1016/j.jorganchem.2012.03.018
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
New copper complexes of several thiosemicarbazones have been prepared and characterized. All complexes have been prepared by employing Cu (II) acetate hydrate, but analytical and spectroscopical data for the isolated complexes revealed that in most cases a reduction to copper (I) occurred. Cyclopropanation reactions of several olefins by ethyldiazoacetate (EDA) in the presence of catalytic amounts of the complexes were examined. The reported results showed that all complexes are competent catalysts for the cyclopropanation reaction of unactivated olefins. Cyclopropanes were obtained in high yields (up to 97%, TON up to 18,400) with moderate to excellent diastereoselectivities (up to >99%). (C) 2012 Elsevier B. V. All rights reserved.
引用
收藏
页码：94 / 103
页数：10
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