5-Ethynyl-2′-deoxyuridine is a common base-modified nucleoside analogue that has served in various applications including selection experiments for potent aptamers and in biosensing. The synthesis of the corresponding triphosphates involves a mild acidic deprotection step. Herein, we show that this deprotection leads to the formation of other nucleoside analogs which are easily converted to triphosphates
5-
乙炔基-
2'-脱氧尿苷是一种常见的碱基修饰的核苷类似物,已用于多种应用,包括强适体的选择实验和
生物传感。相应的
三磷酸酯的合成涉及温和的酸性脱保护步骤。在本文中,我们表明这种脱保护作用导致容易转化为
三磷酸酯的其他核苷类似物的形成。修饰的
三磷酸核苷在引物延伸和PCR条件下都是许多
DNA聚合酶的优良底物,因此可以通过阻断需要进一步修饰的位点来毒化选择实验。这些核苷类似物的形成可以通过应用本文描述的新的合成途径来避免。