Chiral biferrocene-based bis(oxazolines): Ligands for Cu(I)-catalyzed asymmetric cyclopropanations of ene-diazoacetates
SCIE
SCOPUS
- Title
- Chiral biferrocene-based bis(oxazolines): Ligands for Cu(I)-catalyzed asymmetric cyclopropanations of ene-diazoacetates
- Authors
- Kim, SG; Cho, CW; Ahn, KH
- Date Issued
- 1999-08-13
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Abstract
- Chiral biferrocene-based bis(oxazoline) compounds, which have both planar and central chirality, are synthesized. The Cu(I)-complexes of the bis(oxazolinyl)biferrocenes were found to be conformationally flexible and have a wide bile angle (136 degrees) by NMR and molecular modeling studies. The complexes catalyzed the intramolecular cyclopropanation reaction of ene-diazoacetates, and low to moderate enantioselectivities and decreased reactivity were observed, compared to known malonate-derived bis(oxazoline) systems. (C) 1999 Elsevier Science Ltd. All rights reserved.
- Keywords
- ENANTIOSELECTIVE INTRAMOLECULAR CYCLOPROPANATION; CATALYSTS; OLEFINS; LITHIATION; COMPLEXES; LACTONES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/20339
- DOI
- 10.1016/S0040-4020(99)00542-6
- ISSN
- 0040-4020
- Article Type
- Article
- Citation
- TETRAHEDRON, vol. 55, no. 33, page. 10079 - 10086, 1999-08-13
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