For the purpose of diminishing the toxicity of 5-fluorouracil (1) and obtaining biologically active derivatives of 1 suitable for oral administration, alkylthiomethyl, alkylsulfinylmethyl, alkylsulfonylmethyl, and acylthiomethyl groups were introduced at the 1- and 3-positions of 1. The antitumor activity of these synthetic compounds was tested against L1210 leukemia in mice. 1-Alkylthiomethyl-5-fluorouracils showed weak antitumor activity at a high dose (300 mg/kg).
为了降低 5-
氟尿
嘧啶(1)的毒性并获得适合口服的具有
生物活性的 1-
氟尿
嘧啶衍
生物,在 1-
氟尿
嘧啶的 1-和 3-位上引入了烷
硫甲基、烷基亚磺酰甲基、烷基亚磺酰甲基和酰
硫甲基基团。在高剂量(300 毫克/千克)下,1-烷基
硫甲基-5-
氟尿
嘧啶显示出微弱的抗肿瘤活性。