Synthesis of oligonucleotides containing 7-(2-deoxy-β-d-<i>erythro</i>-pentofuranosyl)guanine and 8-amino-2′-deoxyguanosine
作者:T. Sudhakar Rao、Ross H. Durland、Ganapathi R. Revankar
DOI:10.1002/jhet.5570310441
日期:1994.7
deoxygenation procedure from 7-β-D-ribofuranosylguanine (1). The 5′-hydroxyl group of 6 was protected as 4,4′-dimethoxytrityl ether and then converted to the target phosphoramidite (8) via conventional phosphitylation procedure. The amino groups of 8-amino-2′-deoxyguanosine (9) were protected in the form of N-(dimethylainino)methylene functions to give the protected nucleoside 10, which was subsequently
完成了含有7-(2-脱氧-β-D-赤型-呋喃呋喃糖基)鸟嘌呤和8-氨基-2'-脱氧鸟苷的寡核苷酸的合成。活中间Ñ 2异丁酰基-7-(2-脱氧β-D-赤式-pentofuranosyl)鸟嘌呤(6)中的溶液通过一个四个步骤程序脱氧从7-β-d-ribofuranosylguanine(1)。将6的5'-羟基保护为4,4'-二甲氧基三苯甲基醚,然后通过常规的磷酸化步骤将其转化为目标亚磷酰胺(8)。8-amino-2'-deoxyguanosine(9)的氨基被保护为N-(二甲基氨基ino)亚甲基起作用以得到被保护的核苷10,其随后通过二甲氧基三苯甲基化然后被磷酸化而被转化为目标亚磷酰胺12 。使用固相支持的亚磷酰胺方法,将亚磷酰胺8和12掺入26聚体和31聚体的富含G的寡核苷酸中。用含有7-(2-脱氧-β-D-赤型-五氟呋喃-糖基)鸟嘌呤代替2'-脱氧鸟苷的寡核苷酸进行的反平行三链体形成的分析显示三螺旋的形成没有增强。