Synthesis and antiviral evaluation of novel conformationally locked nucleosides and masked 5′-phosphate derivatives thereof
作者:Torsten Bryld、Marianne H. Sørensen、Poul Nielsen、Troels Koch、Claus Nielsen、Jesper Wengel
DOI:10.1039/b203484k
日期:2002.7.11
As part of a programme towards evaluating the potential of conformationally locked 3â²-deoxy- and 3â²-azido-3â²-deoxy-nucleoside derivatives as prodrugs of potential 5â²-O-triphosphorylated anti-HIV drugs, novel nucleoside derivatives with locked N-type (north-type, C3â²-endo) furanose conformation were prepared using convergent synthetic strategies. In addition, masked 5â²-monophosphate derivatives of these, and of a conformationally restricted 3â²-azido-3â²-deoxynucleoside with E-type (eastern-type, O4â²-endo) furanose conformation, were prepared in order to potentially circumvent the first phosphorylation step. However, neither the free 5â²-hydroxy derivatives nor the masked 5â²-monophosphates showed anti-HIV activity in MT-4 cells.
作为评估构象锁定的3′-脱氧和3′-叠氮-3′-脱氧核苷衍生物作为潜在5′-O-三磷酸化抗HIV药物的前药的程序的一部分,采用汇聚合成策略制备了具有锁定的N型(北型,C3′-内环)呋喃糖构象的新型核苷衍生物。此外,为了可能绕过第一步磷酸化反应,还合成了这些衍生物的掩蔽5′-单磷酸衍生物,以及具有E型(东型,O4′-内环)呋喃糖构象的构象受限的3′-叠氮-3′-脱氧核苷的掩蔽5′-单磷酸衍生物。然而,无论是游离的5′-羟基衍生物还是掩蔽的5′-单磷酸化合物在MT-4细胞中均未显示出抗HIV活性。