Synthesis and UV Photolysis of Oligodeoxynucleotides That Contain 5-(Phenylthiomethyl)-2‘-deoxyuridine: A Specific Photolabile Precursor of 5-(2‘-Deoxyuridilyl)methyl Radical
作者:Anthony Romieu、Sophie Bellon、Didier Gasparutto、Jean Cadet
DOI:10.1021/ol005643y
日期:2000.4.1
[formula: see text] The title exocyclic radical (2) is generated via photochemical cleavage of 5-(phenylthiomethyl)-2'-deoxyuridine (8). The latter thionucleoside (8) was successfully incorporated into DNA oligomers by automated DNA synthesis using phosphoramidite chemistry. UV exposure of 8 containing oligonucleotides under (an)aerobic conditions gives rise to specific base lesions. The photoproducts
标题外环基(2)是通过光化学裂解5-(苯硫基甲基)-2'-脱氧尿苷(8)而产生的。后者的硫代核苷(8)通过使用亚磷酰胺化学方法自动进行DNA合成成功地掺入了DNA寡聚物中。在有氧条件下,含有8个寡核苷酸的紫外线暴露会引起特定的基础病变。在详细的NMR和质谱分析的基础上,已分离并进一步表征了光产物。