(2′R)-Ethynyl uridine 3, and its (2′S)-diastereomer 10, are synthesised in a divergent fashion from the inexpensive parent nucleoside. Both nucleoside analogues are obtained from a total of 5 simple synthetic steps and 3 trivial column chromatography purifications. To evaluate their effectiveness against HCV NS5B polymerase, the nucleosides were converted to their respective 5′-O-triphosphates. Subsequently
                                    (2' R )-
乙炔基
尿苷3及其 (2' S )-非对映异构体10是由廉价的母体核苷以不同的方式合成的。两种核苷类似物均通过总共 5 个简单的合成步骤和 3 个简单的柱层析纯化获得。为了评估它们对 HCV NS5B 聚合酶的有效性,将核苷转化为它们各自的 5'-O-
三磷酸。随后,这导致发现 2'-β-
乙炔基18和 -
丙炔基20核苷酸比
索非布韦三磷酸24具有显着提高的效力。