Synthesis of oligoribonucleotides by use of S,S-diphenyl n-monomethoxytrityl ribonucleoside 3'-phosphorodithioates
作者:Shinkichi Honda、Ken-ichi Urakami、Kohji Koura、Kazunori Terada、Yoshinobu Sato、Kyoko Kohno、Mitsuo Sekine、Tsujiaki Hata
DOI:10.1016/0040-4020(84)85114-5
日期:1984.1
2'-OH, and 3'-phosphoryl functions, respectively. The units were converted to the OH or phosphodiester components by treatment with trifluoroacetic acid or with phosphinic acid-triethylamine. Both the components were appropriately coupled by means of mesitylenedisulphonyl chloride 3-nitro-1,2,4-triazole to give dimers in high yields. This method was successfully applied to the synthesis of GpUpApUpUpApApUpAp
经过5步或6步反应,完全保护的核糖核苷酸单元(6a–d)的总产率为42–62%。将二甲氧基三苯甲基,单甲氧基三苯甲基,四氢吡喃-2-基和苯硫基分别引入到5'-OH,外-氨基,2'-OH和3'-磷酰基官能团上。通过用三氟乙酸或次膦酸-三乙胺处理,将单元转化为OH或磷酸二酯组分。借助于均三甲苯二甲磺酰氯3-硝基-1,2,4-三唑适当地偶联两种组分,以高收率得到二聚体。该方法已成功应用于GpUpApUpUpApApUpAp的合成,即溴化花叶病毒4号RNA细丝的5'端碱基序列。