期刊
TETRAHEDRON-ASYMMETRY
卷 13, 期 2, 页码 161-165出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0957-4166(02)00069-1
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Enantiomerically pure tetradentate bis(oxazolinyl)bipyridine ligands 1 have been synthesized in high yields. X-Ray analysis showed that the copper(I) complexes of ligands 1 had a C-2-symmetric helical structure. Ruthenium complexes of ligands 1 prepared in situ were found to be efficient in the asymmetric cyclopropanation of styrene with ethyl diazoacetate. (C) 2002 Elsevier Science Ltd. All rights reserved.
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