Straightforward Synthesis of Novel 1-(2′-α-O-D-Glucopyranosyl ethyl) 2-Arylbenzimidazoles
作者:Natarajan Arumugam、Aisyah Saad Abdul Rahim、Shafida Abd Hamid、Hasnah Osman
DOI:10.3390/molecules17089887
日期:——
series of novel 1-(2'-α-O-D-glucopyranosyl ethyl) 2-arylbenzimidazoles has been prepared via one-pot glycosylation of ethyl-1-(2'-hydroxyethyl)-2-arylbenzimidazole-5-carboxylate derivatives. Synthesis of the 2-arylbenzimidazole aglycones from 4-fluoro-3-nitrobenzoic acid was accomplished in four high-yielding steps. The reduction and cyclocondensation steps for the aglycone synthesis proceeded efficiently
通过1-(2'-羟乙基)-2-芳基苯并咪唑-5-羧酸酯衍生物的一锅糖基化制备了一系列新型1-(2'-α-OD-吡喃葡萄糖基乙基)2-芳基苯并咪唑。由 4-氟-3-硝基苯甲酸合成 2-芳基苯并咪唑苷元通过四个高产步骤完成。糖苷配基合成的还原和环缩合步骤在微波辐射下有效进行,在 2-3 分钟内以优异的产率提供合适的苯并咪唑。用过苯甲基化 1-羟基-吡喃葡萄糖对羟乙基苷元进行糖基化,用 Appel-Lee 试剂进行预处理,然后进行催化氢解,以简单的方法得到所需的 1-(2'-α-OD-吡喃葡萄糖基乙基) 2-芳基-苯并咪唑和直接的方式。