The synthesis of imino glucal 2 from tetra-O-benzyl-d-glucopyranose in 7 steps is described. This imino sugar building block is converted into conformationally constrained deoxymannojirimycin analogue (+)-9 by means of a stereocontrolled cyclopropanation followed by a two step deprotection sequence. Regioselective fission of the cyclopropane ring prior to deprotection provides access to related analogue (+)-11.
本文介绍了通过 7 个步骤从四-O-苄基-d-
吡喃
葡萄糖合成亚
氨基
葡糖 2 的过程。通过立体控制的
环丙烷化反应和两步脱保护反应,该
亚胺糖结构单元被转化为构象受限的脱氧曼尻霉素类似物 (+)-9 。在脱保护之前,
环丙烷环会发生区域选择性裂解,从而获得相关的类似物 (+)-11。