configuration has been determined. We report the synthesis of the core ring system of awajanomycin, which includes: (i) regioselective addition of the acetate unit onto C4-position of N-Boc-3-methoxycarbonyl-2-pyridinone; (ii) stereoselective installation of a hydroxyl group on C3-position; and (iii) stereo- and regioselective epoxide-opening reaction by Me3Al.
从海洋来源的真菌中分离出的阿波那霉素具有独特的结构特征和针对A549细胞的细胞毒活性。由于其独特的结构,尚无完整的合成报道,也没有确定相对立体
化学或绝对构型。我们报道了
阿维霉素的核心环系统的合成,该合成包括:(i)将
乙酸酯单元区域选择性加成到N -Boc-3-甲氧基羰基-2-
吡啶酮的C4位上;(ii)在C3-位上立体选择性地安装羟基;(iii)由Me 3 Al进行的立体和区域选择性
环氧化物的开放反应。