作者:Sonia Pérez-Rentero、Javier Alguacil、Jordi Robles
DOI:10.1016/j.tet.2008.11.069
日期:2009.2
were devised as new cationic units in oligonucleotides, by combining morpholino-nucleosides (to simplify the nomenclature, we will use the term morpholino-nucleosides to refer to nucleoside analogues in which the ribose ring was transformed into a morpholine) with internucleoside guanidines. Here, methodology was developed to synthesize oligonucleotides containing morpholinoamidines formed by morpholino-uridine
通过结合吗啉代核苷(为简化命名,我们将使用吗啉代核苷一词来指代其中核糖环被转化为吗啉的核苷类似物)与核苷间胍,将吗啉代am啶设计为寡核苷酸中的新阳离子单元。在此,开发了合成包含由吗啉代尿苷和5'-氨基-5'-脱氧胸苷形成的吗啉代am的寡核苷酸的方法。吗啉代am是通过Alloc-吗啉代碳硫代酰胺与5'-氨基核苷酸树脂的固相反应和Mukaiyama的试剂活化而产生的。两个14聚体合成了包含单个吗啉代am的寡核苷酸,并通过形成DNA双螺旋和三螺旋来研究它们的亲和特性。双工通过3'单元略微稳定,但如果位于内部,则不稳定。值得注意的是,三重链在pH 7.0下显着稳定。