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TETRAHEDRON LETTERS
卷 41, 期 14, 页码 2475-2478出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(00)00183-0
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The preparation in a five-step sequence of 2-methyl-Quinazolinap, a new atropisomeric ligand for asymmetric catalysis, is described. Diastereomeric palladacycles derived from racemic ligand and (+)-di-mu-chlorobis[(R)-dimethyl(1-( 1-naphthyl)ethyl)aminato-C-2,N]dipalladium(II) were separated by fractional crystallisation. Displacement of the resolving agent by reaction with DPPE afforded enantiopure 2-methyl-Quinazolinap. (C) 2000 Elsevier Science Ltd. All rights reserved.
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