作者:Natalya Ramzaeva、Cathrin Mittelbach、Frank Seela
DOI:10.1002/hlca.19970800605
日期:1997.9.22
7-deaza-2′-deoxyguanosine 2 into single-stranded oligomers of the type 24 and 25 did not lead to change in duplex stability compared to the parent oligonucleotides. The self-complementary oligomer 15 with alternating npey7c7Gd (2) and dC units did not lead to a cooperative melting, either due to orientational disorder or interaction of the 5-aminopent-1-ynyl moiety with a base or with phosphate residues
亚磷酰胺6b和9以及衍生自7-(己-1-炔基)-和7- [5-(三氟乙酰胺基)戊-1-炔基]取代的7-脱氮基2'-脱氧鸟苷1和2的膦酸酯6a。分别准备了10个(方案1)。它们用于交替八聚体d(hxy 7 c 7 G-C)4(12),d(C-hxy 7 c 7 G)4(13)和d(npey 7 c 7 G-C)的固相寡聚脱氧核苷酸合成中。4(15),以及其他的寡核苷酸(见22 - 25 ;表2 ; HXY =己-1-炔基,npey = 5-氨基戊-1-炔基)。确定了T m值和双链体形成的热力学数据,并将其与DNA片段的主要凹槽修饰相关。发现引入到7-脱氮鸟嘌呤残基的7-位的己炔基侧链(参见1)适合没有任何突出的主要凹槽。将(5-氨基戊-1-炔基)修饰的7-deaza-2'-deoxyguanosine 2掺入24和25型单链低聚物中与亲本寡核苷酸相比,没有导致双链体稳定性的改变。具有交替的npey