A simple and direct method for the synthesis of C-5 modified nucleosides is described. Photoirradiation of 2'-deoxyuridine 5'-phosphate (I), in the presence of haloheteroarenes afforded the C-5 heteroaryl substituted nucleotides. 5-(2-Hydroxyethyl)nucleotide also obtained from photocoupling of I with 2-iodoethanol. Photoirradiation of 5-iodo-2-deoxyuridine 5'-phosphate (II), in the presence of methyl acrylate or acrylonitrile, gave 5-(2-methoxycarbonylethenyl) and 5-(2-cyanoethenyl) nucleotide, respectively.
描述了一种合成C-5修饰核苷的简单直接方法。在卤代
杂环化合物的存在下,对2'-
脱氧尿
嘧啶5'-
磷酸 (
I) 进行光照射,得到了C-5杂环取代
核苷酸。5-(2-羟乙基)
核苷酸也可以通过将
I 与
2-碘乙醇进行光耦合反
应得到。在
甲基丙烯酸甲酯或
丙烯腈的存在下,对5-
碘-2'-
脱氧尿
嘧啶5'-
磷酸 (
II) 进行光照射,分别得到5-(
2-甲氧羰基
乙烯基)
核苷酸和5-(2-
氰基
乙烯基)
核苷酸。