Substituted salen-Ru(II) complexes as catalysts in the asymmetric cyclopropanation of styrene by ethyl diazoacetate: the influence of substituents and achiral additives on activity and enantioselectivity
文献类型：期刊论文
| 作者 | Yao, XQ; Qiu, M; Lu, WR; Chen, HL; Zheng, Z |
| 刊名 | tetrahedron-asymmetry
 |
| 出版日期 | 2001-02-19 |
| 卷号 | 12期号:2页码:197-204 |
| 英文摘要 | a series of alkyl-, halogen- and nitro-substituted salen ligands, 1, have been employed in the asymmetric cyclopropanation of styrene with ethyl diazoacetate by its ruthenium(ii) complex with [rucl2(p-cymene)](2) or rucl2(pph3)(3) as precursors. the introduction of appropriate electron withdrawing groups in the salen ligands benefited the enantioselectivity of the reaction. some additives, including o-donor, n-donor and p-donor ligands, were added to the reaction to improve the enantioselectivity and activity, and e.e.s of up to 80% were achieved. in the salen/[rucl2(p-cymene)](2) system, the (1r,2s)-isomer was obtained in 80.2% e.e. by using the salen ligand if derived from 3,5-dibrominated salicylaldehyde with et3n as additive. e.e.s of up to 81.3% for (1s,2r)-isomers were achieved by using the complex 2 synthesized from the nitro-substituted ligand im and rucl2(pph3)(3). a possible mechanism was also discussed. (c) 2001 elsevier science ltd. all rights reserved. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, inorganic & nuclear ; chemistry, organic ; chemistry, physical |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | copper carbenoid reaction ; bis-oxazoline ligands ; cobalt(ii) complexes ; ruthenium porphyrin ; highly efficient ; chiral ligands ; olefins ; epoxides ; aziridination ; derivatives |
| 收录类别 | SCI ; CCR |
| 语种 | 英语 |
| WOS记录号 | WOS:000167689600006 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://159.226.238.44/handle/321008/138941]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yao, XQ,Qiu, M,Lu, WR,et al. Substituted salen-Ru(II) complexes as catalysts in the asymmetric cyclopropanation of styrene by ethyl diazoacetate: the influence of substituents and achiral additives on activity and enantioselectivity[J]. tetrahedron-asymmetry,2001,12(2):197-204. |
| APA | Yao, XQ,Qiu, M,Lu, WR,Chen, HL,&Zheng, Z.(2001).Substituted salen-Ru(II) complexes as catalysts in the asymmetric cyclopropanation of styrene by ethyl diazoacetate: the influence of substituents and achiral additives on activity and enantioselectivity.tetrahedron-asymmetry,12(2),197-204. |
| MLA | Yao, XQ,et al."Substituted salen-Ru(II) complexes as catalysts in the asymmetric cyclopropanation of styrene by ethyl diazoacetate: the influence of substituents and achiral additives on activity and enantioselectivity".tetrahedron-asymmetry 12.2(2001):197-204. |
入库方式： OAI收割
来源：大连化学物理研究所
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