The first synthesis of amykitanose, an O-carbamoyl pyranose component of the potent broad-spectrum antibiotic amycolamicin, has been accomplished from l-fucose in eight steps. The key transformations involve a stereochemical inversion at the C2 asymmetric center of an l-fucose derivative via an oxidation/reduction sequence, a regioselective installation of the 3-acetoxy functionality by acid-promoted
直链淀粉的首次合成是一种强效广谱抗生素支链霉素的O-氨基甲酰基吡喃糖成分,已从 L-岩藻糖分 8 个步骤完成。关键的转化包括通过氧化/还原序列在 L-岩藻糖衍生物的 C 2 不对称中心进行立体化学反转,通过酸促进的环状原酸酯水解和四溴化钛区域选择性安装 3-乙酰氧基官能团。介导的倒数第二个糖苷中间体的水解。