Asymmetric synthesis and biological evaluation of .beta.-L-(2R,5S)- and .alpha.-L-(2R,5R)-1,3-oxathiolane-pyrimidine and -purine nucleosides as potential anti-HIV agents
作者:Lak S. Jeong、Raymond F. Schinazi、J. Warren Beach、Hea O. Kim、Satyanarayana Nampalli、Kirupathevy Shanmuganathan、Antonio J. Alves、Angela McMillan、Chung K. Chu、Rodney Mathis
DOI:10.1021/jm00054a001
日期:1993.1
(alpha-isomer) > 5-methylcytosine (beta-isomer) > 5-bromocytosine (beta-isomer) > 5-chlorocytosine (beta-isomer). Among the thymine, uracil, and 5-substituted uracil derivatives, thymine (alpha-isomer) and uracil (beta-isomer) derivatives exhibited moderate anti-HIV activity. In the purine series, the antiviral potency is found to be in the following decreasing order: adenine (beta-isomer) > 6-chloropurine
为了研究作为潜在抗HIV药物的L-氧杂硫杂环戊烷核苷的构效关系,合成了一系列对映体纯的L-氧杂硫杂环戊烷嘧啶和嘌呤核苷,并评估了其在人外周血单核中的抗HIV-1活性( PBM)细胞。关键中间体8是从L-古洛糖经1,6-硫代脱水-L-葡糖基吡喃糖合成的。乙酸盐8与胸腺嘧啶,5-取代的尿嘧啶和胞嘧啶,6-氯嘌呤和6-氯-2-氟嘌呤缩合,得到嘧啶和嘌呤核苷。在评估这些最终核苷后,发现5-氟胞嘧啶衍生物51是所测试化合物中最有效的化合物。在5取代的胞嘧啶类似物的情况下,发现抗病毒效力的降序如下:胞嘧啶(β-异构体)> 5-碘胞嘧啶(β-异构体)> 5-氟胞嘧啶(α-异构体)> 5-甲基胞嘧啶(α-异构体)> 5-甲基胞嘧啶(β-异构体)> 5-溴胞嘧啶(β-异构体)> 5-氯胞嘧啶(β -异构体)。在胸腺嘧啶,尿嘧啶和5-取代的尿嘧啶衍生物中,胸腺嘧啶(α-异构体)和尿嘧啶(β-异构体)衍生物表现