| Asymmetric Cyclopropanation Catalyzed by Four Stereoisomers of a Copper-(Schiff-base) Complex with Double Chiral Centers |
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| 引用本文： | Chang Sheng JIANG,You Gui LI,Chen JIANG,Fang WANG,Tian Pa YOU* Department of Chemistry,Universtity of Science & Technology of China,Hefei 230026. Asymmetric Cyclopropanation Catalyzed by Four Stereoisomers of a Copper-(Schiff-base) Complex with Double Chiral Centers[J]. 中国化学快报, 2002, 13(12) |
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| 作者姓名： | Chang Sheng JIANG You Gui LI Chen JIANG Fang WANG Tian Pa YOU* Department of Chemistry Universtity of Science & Technology of China Hefei 230026 |
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| 作者单位： | Chang Sheng JIANG，You Gui LI，Chen JIANG，Fang WANG，Tian Pa YOU* Department of Chemistry，Universtity of Science & Technology of China，Hefei 230026 |
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| 摘 要： | Catalytic asymmetric cyclopropanation of diazoacetates with olefins has attracted much attention. Those catalysts containing various metals and optically active ligands have been employed for this reaction1,2. The first catalytic asymmetric cyclopropanation reaction was reported in 1966 by Nozaki et al.3. The author used the copper(II) complex 1 bearing a salicyladimine ligand as catalyst though with a low e.e. value of 6%. Aratani and his coworkers designed the copper-(Schiff-base) comp…
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Asymmetric Cyclopropanation Catalyzed by Four Stereoisomers of a Copper-(Schiff-base) Complex with Double Chiral Centers |
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| Chang Sheng JIANG,You Gui LI,Chen JIANG,Fang Wang,Tian Pa YOU. Asymmetric Cyclopropanation Catalyzed by Four Stereoisomers of a Copper-(Schiff-base) Complex with Double Chiral Centers[J]. Chinese Chemical Letters, 2002, 13(12) |
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| Authors: | Chang Sheng JIANG You Gui LI Chen JIANG Fang Wang Tian Pa YOU |
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| Abstract: | Four stereoisomers of a copper-(Schiff-base) complex with double chiral centers were applied to catalyze the asymmetric cyclopropanation. Two of the stereoisomers were also efficient catalysts affording high enantiomeric excess of up to 91.8%. A mechanism that predicts the observed results accurately was proposed. |
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| Keywords: | Asymmetric cyclopropanation copper-(Schiff-base) olefins diazoacetates. |
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