pharmacological properties, but for which few stereoselective syntheses exist. Herein we describe a 7-step stereoselective synthesis of (2R)-pterosin B via 6-bromo-5,7-dimethylindan-1-one whose structure was confirmed by NOE analysis and structure determination by X-ray crystallography. The hydroxyethyl chain was introduced via a Suzuki-Miyaura cross-coupling reaction. The 2-methyl group was introduced
蕨素B是蕨菜蕨(Pteridium aquilinum)中发现的天然
茚满酮,具有多种有趣的药理特性,但很少有立体选择性合成。本文中,我们描述了通过6-
溴-5,7-二甲基
茚满-1-酮(7 R)-蝶呤B的7步立体选择性合成,其结构通过NOE分析和X射线晶体学确定了结构。通过Suzuki-Miyaura交叉偶联反应引入羟乙基链。通过
SAMP [(S -1)-
氨基-2-甲氧基甲基)
吡咯烷]的甲基化立体选择性地引入2-甲基,并除去手性助剂以产生(2 R)-蝶呤B。蝶呤B的结构通过比旋光度和通过X射线晶体学确定的结构来确认。