First stereoselective synthesis of potassium aeschynomate and its no-natural stereomers
作者:Stéphanie Claudel、Tomasz Krzysztof Olszewski、Pierre Mutzenardt、Christie Aroulanda、Philippe Coutrot、Claude Grison
DOI:10.1016/j.tet.2005.11.051
日期:2006.2
The synthesis of potassium aeshynomate and its non-natural stereomers was achieved using the Sharpless catalytic asymmetric dihydroxylation of (Z) or (E) vinylogous glycine as the key step. The resulting gamma-amino alpha, beta-dihydroxyester stereomer was deprotected and coupled with the caffeic acid to afford stereoselectively potassium aeshynomate or its stereomers. A detailed study of the NMR data of the different stereomers is reported that corrects the literature data. (c) 2005 Elsevier Ltd. All rights reserved.