Oligodeoxyribonucleotide Analogues with Bridging Dimethylene Sulfide, Sulfoxide, and Sulfone Groups. Toward a Second-Generation Model of Nucleic Acid Structure
作者:Zhen Huang、Steven A. Benner
DOI:10.1021/jo0003910
日期:2002.6.1
Short DNA analogues with bridging dimethylene sulfide, sulfoxide, and sulfone groups replacing the phosphate diesters (S-DNAs) were synthesized from building blocks prepared via two routes, both starting from D-glucose. Building blocks for RNA analogues were prepared by stereoselective introduction of nucleobase into a 2'-acylated ribose analogue. The ribose analogues were converted to deoxyribose
由桥接二甲基硫醚,亚砜和砜基取代磷酸二酯(S-DNA)的短DNA类似物是从通过两种途径制备的结构单元合成的,均从D-葡萄糖开始。通过将核碱基立体选择性地引入2'-酰化的核糖类似物中来制备RNA类似物的构件。通过用硫代乙酰基单元取代3''-OH基团,然后进行光解脱氧或基于自由基的2'-脱氧,将核糖类似物转化为脱氧核糖类似物。通过CH(2)(-)S-CH(2)单元连接的DNA类似物是通过S(N)2置换一个构件上的6'-甲磺酰基使用另一构件的硫醇盐亲核试剂制备的。建立了巯基和羟基的4,4'-二甲氧基三苯甲基保护和脱保护方案。通过用过氧化氢氧化获得相应的亚砜DNA类似物。在硅酸钛催化剂存在下,用过硫酸盐或过氧化氢将硫化物DNA氧化,即可得到砜DNA类似物。检查了几种代表性寡核苷酸类似物的物理性质,并根据DNA链识别的“第二代”模型进行了解释,该模型强调了聚阴离子主链在减少高度官能化分子形成的不良趋