申请人:Srivastava Suresh C.
公开号:US20150018579A1
公开(公告)日:2015-01-15
The 5′ and 3′-thiol modified oligonucleotides are attractive tools with a vast number of potential applications in the field of nucleic acid chemistry. There is a strong interest in developing new disulfide compounds or to optimize synthesis of existing disulfide modifiers, which are efficient in generating the 3′- or 5′-end reactive thiol group. Various synthetic protocols have been employed to synthesize pure 3-((3-(bis(4-dimethoxytrityl)propyl)di-sulfanyl)propyl 2-cyanoethyl diisopropylphosphoramidite (compound 2) starting from 3-(dimethoxytrityl)propyl)disulfanyl)pro-pan-1-ol, (compound 1). Herein, we describe an efficient, reproducible synthetic and purification protocol for target compound 2 from the compound 1. It is noteworthy that our reaction conditions were reproducible even at multi-gram scale (27 g) with a purity level as achieved in a small scale.
5'-和3'-巯基修饰寡核苷酸是核酸化学领域中具有广泛潜力应用的有吸引力的工具。人们对于开发新的二硫化合物或优化现有的二硫化修饰剂的合成方法非常感兴趣,这些化合物能够有效地产生3'或5'端的反应性巯基基团。已经采用了各种合成方案来合成纯的3-((3-(双(4-二甲氧基三苯甲基)丙基)二硫)丙基2-氰基乙基二异丙基磷酰胺酯(化合物2),起始物为3-(二甲氧基三苯甲基)丙基)二硫)丙-1-醇(化合物1)。在此,我们描述了一种高效、可重复的从化合物1合成目标化合物2的合成和纯化方案。值得注意的是,我们的反应条件即使在多克级别(27克)也是可重复的,并且纯度水平与小规模实验中所达到的一样。