Highly selective reaction of methyl tetra-O-pivaloyl-β-D-glucopyranuronate 2 with iodotrimethylsilane or (Me3Si)2 and I2 affords, in excellent yield, the ‘disarmed’ glycosyl iodide 1 which has good stability at 20 °C and excellent stability at 0 °C; the X-ray crystal structure of 1 is described, along with a comparison of its utility as a glycosyl donor to that of the corresponding bromide.
甲基四-O-叔丁酰基-β-
D-吡喃葡萄糖苷酸2与
碘三甲基
硅烷或(Me3Si)2和I2发生高选择性反应,以优异的产率生成“解除武装”的糖基
碘化物1,其在20°C下具有良好的稳定性,0°C下稳定性极佳;描述了1的X射线晶体结构,并将其作为糖基供体的效用与相应
溴化物的效用进行了比较。