Activation of nucleoside donors 5 by sulfuryl chloride followed by the addition of 5′-thionucleoside acceptors 3 yields 5′-thioformacetal dinucleotide analogs 6 with in situ trapping of liberated methanesulfenyl chloride with cyclohexene. Purine as well as pyrimidine derivatives can be part of a coupling reaction as nucleoside donors or acceptors. The dimethoxytrityl protecting group is compatible
通过
硫酰氯活化核苷供体5,然后添加5'-
硫代核苷受体3,得到5'-
硫代
甲醛缩醛二核苷酸类似物6,其用
环己烯原位捕获释放的甲
磺酰氯。
嘌呤以及
嘧啶衍
生物可以作为核苷供体或受体参与偶联反应。二甲氧基三苯甲基保护基与本偶联方法相容,从而允许差动的3',5'-末端保护以及随之而来的正交碱基保护。