cell cultures. The introduction of the 4-substituent led to a strong reduction of antiviral activity for dUrd but not for araU analogues. Three of the 4,5-disubstituted uracil nucleoside derivatives, 4-O-(difluoromethyl)-5-bromo-araU (5c),-5-methyl-araU (5e), and -(E)-5-(2-bromovinyl)-araU (5g), displayed a high and selective inhibitory effect against HSV-1, but only 5e was effective against both HSV-1
通过
CF2插入反应制备4-O-甲
硅烷基化的核苷,制备了5-取代的
尿苷(Urd),
2'-脱氧尿苷(dUrd)和阿拉伯
呋喃糖基尿
嘧啶(araU)核苷的各种4-O-二
氟甲基类似物。单纯疱疹病毒1型(HSV-1)和2型(HSV-2)以及人类胚胎肺成纤维细胞(HELF)
细胞培养物中的细胞毒性。4-取代基的引入导致对dUrd的抗病毒活性大大降低,但对araU类似物却没有。4,5-二取代的尿
嘧啶核苷衍
生物中的三个,4-O-(二
氟甲基)-5-
溴-araU(5c),-5-
甲基-araU(5e)和-(E)-5-(2-
溴夫酰)-araU(5克)对HSV-1具有高选择性的抑制作用,