Carbocyclic Analogs of Nucleosides. Part 4. Preparation of enantiomerically pure analogs of purine nucleosides for the synthesis of sulfone-linked oligonucleotide analogs
作者:Thomas F. Jenny、Steven A. Benner
DOI:10.1002/hlca.19930760207
日期:1993.3.24
4-(2-hydroxyethyl) functionality, and a nucleoside base are carbocyclic variants of nucleoside analogs previously described as building blocks for the preparation of oligonucleotide analogs having dimethylene sulfone (= methanosulfonylmethano) linking groups replacing the phosphodiester linking units found in natural oligonucleotides. These carbocyclic nucleoside analogs (e.g. 17 and 20) are stable to
带有3-(羟甲基)基团,4-(2-羟乙基)官能团和核苷碱基的环戊烷衍生物是核苷类似物的碳环变体,先前被描述为用于制备具有二亚甲基砜(=甲磺酰基磺酰基甲基)连接的寡核苷酸类似物的结构单元。取代天然寡核苷酸中存在的磷酸二酯连接单元的基团。这些碳环核苷类似物(例如,17和20)是稳定的两个酸催化脱嘌呤和碱催化的水解,在与寡核苷酸的最非离子类似物对比度。此外,可以在完全控制异头中心的立体化学的情况下制备它们。给出了制备这些嘌呤核苷类似物的程序通过构建对映体纯的碳环骨架(方案1-3),然后进行Mitsunobu型反应以引入嘌呤碱衍生物(方案4)。此外,还报道了将这些类似物偶联以产生核苷二聚体(例如26)的初步结果(方案5)。