Stereoselective Synthesis and Antiviral Activity of <scp>d</scp>-2‘,3‘-Didehydro-2‘,3‘-dideoxy-2‘-fluoro-4‘-thionucleosides
作者:Youhoon Chong、Hyunah Choo、Yongseok Choi、Judy Mathew、Raymond F. Schinazi、Chung K. Chu
DOI:10.1021/jm020246+
日期:2002.10.1
As 2',3'-didehydro-2',3'-dideoxy-2'-fluoronucleosides have exhibited interesting antiviral effects against HIV-1 as well as HBV, it is of interest to synthesize the isosterically substituted 4'-thionucleosides in which 4'-oxygen is replaced by a sulfur atom. To study structure-activity relationships, various pyrimidine and purine nucleosides were synthesized from the key intermediate (2R,4S)-1-O-a
由于2',3'-didehydro-2',3'-dideoxy-2'-氟核苷对HIV-1和HBV表现出令人感兴趣的抗病毒作用,因此,合成等位取代的4'-硫代核苷令人感兴趣。 4'-氧被硫原子取代。为了研究结构活性关系,从关键中间体(2R,4S)-1-O-乙酰-5-O-(叔丁基二苯基甲硅烷基)-2,3-二脱氧-2-氟-合成了各种嘧啶和嘌呤核苷。由2,3-O-异亚丙基-D-甘油醛1以13个步骤制备2-苯基硒基-4-硫代-β-D-呋喃呋喃糖苷8。在人外周血单核(PBM)细胞中评估了合成化合物对HIV-1的抗病毒活性,其中包括胞苷17、5-氟胞苷18,腺苷24,和2-氟腺苷32显示中等至有效的抗HIV活性(分别为EC(50)1.3、11.6、8.1和1.2 microM)。值得注意的是,2-氟腺苷类似物32显示出抗病毒效力以及高细胞毒性(对于PBM,CEM和Vero,IC(50)分别为1.5、1.1和7