Nucleosides with a Twist. Can Fixed Forms of Sugar Ring Pucker Influence Biological Activity in Nucleosides and Oligonucleotides?
作者:Victor E. Marquez、Maqbool A. Siddiqui、Abdallah Ezzitouni、Pamela Russ、Jianying Wang、Richard W. Wagner、Mark D. Matteucci
DOI:10.1021/jm960306+
日期:1996.1.1
of the pseudosugar rings into a Northern conformation, typical of A-DNA, was evident by the increase in Tm of the corresponding DNA/RNA heteroduplex. However, the rigid A-tract ODN caused loss of RNase H recruitment. A detailed conformational analysis of (N)-methanocarba-T (2) and (S)-methanocarba-T (12), as representative examples of conformationally rigid pseudorotational antipodes, revealed that
已知溶液中核苷的糖部分以假旋转循环中定义的极端北部和南部构象之间的快速动态平衡存在。在当前的工作中,我们描述了双环[3.1.0]己烷模板如何将2'-脱氧-甲氨基甲酸酯-核苷1-5和12的环褶皱固定为与以下两个典型的极端构型之一相对应的值:核苷。固定的Northern构象1-5的合成是通过杂环基与手性碳环醇6 [[(1R,2S,4R,5S)-1-[(苄氧基)甲基] -2-(叔-丁氧基)-4-羟基ybicyclo [3.1.0]己烷],而较早报道了南部构象异构体(S)-甲氨基甲酸酯-T(12)的合成。碳环胸苷(carba-T,13)作为参考,柔性碳环核苷。对这些化合物的抗病毒评价表明,它与北胸腺嘧啶核苷类似物2有关,具有很强的抗疱疹活性,它比参考标准阿昔洛韦对HSV-1和HSV-2的作用更强。(N)-Methanocarba-T(2)被进一步评估为短硫代脱氧核苷酸(ODN)硫代磷酸酯(5'-C