期刊
TETRAHEDRON
卷 64, 期 39, 页码 9203-9207出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2008.07.061
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- MIUR (Rome)
Side chain protonation of basic alpha-amino acids with Bronsted acids provides new effective catalysts for the direct asymmetric aldol reaction of cyclic ketones with aromatic aldehydes in ionic liquids and DMSO. Increased yields are obtained in N-butyl N-methyl pyrrolidinium triflate ([bmpy][TfO]) with respect to DMSO Using argininium tosylate (Arg VISA) as a 1.3 M aq solution in 10% molar amount with respect to the limiting aldehyde. (C) 2008 Elsevier Ltd. All rights reserved.
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