作者:Akop Yepremyan、Baback Salehani、Thomas G. Minehan
DOI:10.1021/ol100315g
日期:2010.4.2
Syntheses of the C-glycosyl flavone natural products aspalathin and nothofagin have been accomplished in eight steps from tribenzyl glucal, tribenzylphloroglucinol, and either 4-(benzyloxy)phenylacetylene or 3,4-bis(benzyloxy)phenylacetylene. The key step of the syntheses involves a highly stereoselective Lewis acid promoted coupling of 1,2-di-O-acyl-3,4,6-tribenzylglucose with tribenzylphloroglucinol
C-糖基黄酮天然产物天冬酰胺和诺夫他汀的合成已由三苄基葡萄糖,三苄基间苯三酚和4-(苄氧基)苯乙炔或3,4-双(苄氧基)苯乙炔以八步完成。合成的关键步骤涉及高度立体选择性的路易斯酸促进1,2-二-O-酰基-3,4,6-三苄基葡萄糖与三苄基间苯三酚的偶联,从而在30-中产生相应的β- C-芳基糖苷65%的产率。