We have synthesized and characterized a series of dendritic oligothiophenes comprising peripheral mannose functionalities by copper-mediated 1,3-dipolar cycloaddition reaction. The hybrids were accessible either by attachment of acetyl-protected mannosides at the dendritic oligothiophene or by the direct synthesis of the deprotected mannose–oligothiophene conjugates by applying heterogeneous reaction conditions. The specific interaction of the functional dendritic hybrids with lectin protein Concanavalin A was investigated by absorption and fluorescence spectroscopic measurements. An enhancement of turbidity was observed due to the specific interaction of the mannosidic dendrimer with Con A. The specific interaction was further confirmed by fluorescence quenching upon addition of the mannosidic hybrid to Con A.
我们通过
铜介导的 1,3-二极环加成反应合成了一系列包含外围
甘露糖官能团的树枝状低聚
噻吩,并对其进行了表征。通过在树枝状低聚
噻吩上附着乙酰基保护的
甘露糖苷,或者通过采用异构反应条件直接合成去保护的
甘露糖-低聚
噻吩共轭物,可以获得这些杂交化合物。通过吸收和荧光光谱测量,研究了功能性树枝状杂交体与凝集素蛋白康卡那瓦林 A 的特异性相互作用。由于
甘露糖苷树枝状聚合物与 Con A 的特异性相互作用,浊度得到了提高。