Reaction of 3',5'-di-O-benzoyl-6-methyl-2'-deoxyuridine (IIa) with elementary bromine or iodine afforded 5-halogeno derivatives IIc and IId which on methanolysis gave 5-bromo-6-methyl-2'-deoxyurine (Ic) and 5-iodo-6-methyl-2'-deoxyurine (Id), respectively. The CD spectra of Ic, Id and 6-methyl-2'-deoxyuridine (Ia) are compared and discussed with regard to determination of the nucleoside conformation. Unlike 5-bromo- and 5-iodo-2'-deoxyuridine, the 6-methyl derivatives Ic and Id exhibit neither antibacterial nor antiviral activity. Nor do they exert any antimetabolic effect on the de novo DNA synthesis in primary rabbit kidney cells.
3',5'-二-O-苯甲酰-6-甲基-2'-脱氧尿
嘧啶(IIa)与
单质溴或
碘反应生成5-卤代衍
生物IIc和IId,经
甲醇解析后得到5-
溴-6-甲基-2'-脱氧尿
嘧啶(Ic)和5-
碘-6-甲基-2'-脱氧尿
嘧啶(Id)。比较并讨论了Ic、Id和6-甲基-2'-脱氧尿
嘧啶(Ia)的CD光谱,以确定核苷的构象。与5-
溴-和5-
碘-2'-脱氧尿
嘧啶不同,6-甲基衍
生物Ic和Id既不具有抗菌和抗病毒活性,也不对原代兔肾细胞中的新生DNA合成产生任何抗代谢作用。