Synthesis of Bistramide A and Analogues, Part 1: Stereoselective Access to Normethyl Tetrahydropyran Subunit
作者:Béatrice Pelotier、Olivier Piva、Marie-Aude Hiebel、Paul Lhoste
DOI:10.1055/s-2008-1072714
日期:2008.5
A stereoselective synthesis of normethyl C1-C13 fragment of bistramide A is described. The key steps involve an asymmetric Sharpless epoxidation, a cross-metathesis reaction and an intramolecular oxa-Michael reaction. The trans-2,6-disubstituted tetrahydropyran subunit has been synthesized in an overall yield of 7% with 96% ee. The cis isomer was prepared by a similar pathway with the same efficiency
描述了双链酰胺 A 的正甲基 C1-C13 片段的立体选择性合成。关键步骤包括不对称 Sharpless 环氧化、交叉复分解反应和分子内 oxa-Michael 反应。已以 7% 的总产率和 96% 的 ee 合成了反式-2,6-二取代的四氢吡喃亚基。顺式异构体通过类似的途径制备,具有相同的效率和对映选择性。