A cytosine analogue containing a conformationally flexible acyclic linker for triplex formation at sites with contiguous G-C base pairs
作者:Guobing Xiang、Larry W McLaughlin
DOI:10.1016/s0040-4020(97)10289-7
日期:1998.1
the pyrimidine bases T and m5oxC have been prepared with flexible acyclic carbohydrate linkers. A new procedure, beginning with (R)-(−)-2,2-dimethyl-1,3-dioxolane-4-methanol permits the preparation of the stereochemically pure acyclic derivatives of both protected nucleoside analogues without contamination by a problematic rearrangement product. By simply increasing the flexibility of the carbohydrate
嘧啶碱基T和m 5ox C的两个核苷衍生物已用柔性无环碳水化合物连接基制备。从(R)-(-)-2,2-二甲基-1,3-二氧戊环-4-甲醇开始的新方法可以制备两种受保护的核苷类似物的立体化学纯无环衍生物,而不会受到有问题的重排产物的污染。通过简单地增加am 5ox C核苷衍生物的碳水化合物部分的柔韧性,包含5个连续GC碱基对的15-mer三联体的T m值提高了7-8°C 。