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Asymmetric dihydroxylation using heterogenized cinchona alkaloid ligands on mesoporous silica

Cited 39 time in Web of Science Cited 44 time in Scopus
Authors
Lee, Hong Myung; Kim, Sang-Wook; Hyeon, Taeghwan; Kim, Byeong Moon
Issue Date
2001-07
Citation
Tetrahedron Asymmetry, Vol.12 No.11, pp.1537-1541
Abstract
Cinchona alkaloids have been successfully grafted on mesoporous silica. Asymmetric dihydroxylation using the heterogenized chiral ligands procceded with varying degrees of enantioselection depending upon the nature of the chiral ligands. High asymmetric induction (up to > 99.5% enantiomeric excess) almost equal to that obtained from the homogeneous, catalyst system could be achieved using a dimeric alkaloid ligand with a six-carbon link between the ligand and the Support (L3). while inferior results were obtained when a monomeric alkaloid ligand system vas used. Reduced enantioselectivites were observed upon repeated recycling of the immobilized ligand system. (C) 2001 Elsevier Science Ltd. All rights reserved.
ISSN
0957-4166
URI
http://hdl.handle.net/10371/166109
DOI
https://doi.org/10.1016/S0957-4166(01)00284-1
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Chemical Convergence for Energy and Environment (에너지환경 화학융합기술전공)Journal Papers (저널논문_에너지환경 화학융합기술전공)
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