Novel eco-friendly solution for the regioselective acetylation of per-O-TMS carbohydrates
作者:Lina Jin、Xianya Mao、Zhikun Wang、Yangyi Mao、Jianwei Mao、Yanli Cui
DOI:10.1016/j.carres.2020.108074
日期:2020.9
Regioselective acetylation of per-O-TMS carbohydrates was achieved preferentially at the 6 position or 1,6-position under mild conditions involving the eco-friendly solvent acetonitrile, at room temperature, in ambient atmosphere and in a shorter time. Good or moderate yields were obtained via 4-dimethylaminopyridine, without auxiliary equipment. A single α-O-Acetyl acetylation anomer was exclusively
在温和条件下,在环境友好的环境中,在室温,环境气氛中且在较短的时间内,优先在6位或1,6-位上实现per-O-TMS碳水化合物的区域选择性乙酰化。在没有辅助设备的情况下,通过4-二甲基氨基吡啶获得了良好或中等的产率。单独为涉及的底物定义了一个单一的α-O-乙酰乙酰化单体。应用6-O-单乙酸酯衍生物并将其用作二糖构建中的稳定的糖基供体。该方法学成功用于多种底物,包括:d-乳糖,d-海藻糖,d-半乳糖,甲基α-d-半乳糖,d-葡萄糖,d-甘露糖,d-木糖和l-岩藻糖。