Journal
TETRAHEDRON
Volume 57, Issue 12, Pages 2391-2402Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4020(01)00093-X
Keywords
cinchona alkaloid; phase-transfer; asymmetric catalysis; amino acid
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In this paper, we describe the synthesis of a series of chiral quaternary ammonium salts with core structures that are closely related to the cinchona alkaloid, cinchonine. By employing these salts as asymmetric phase-transfer agents in the benzylation of a glycine imine, an optimal catalyst structure is identified. (C) 2001 Elsevier Science Ltd. All rights reserved.
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