Methods for increasing the elimination half-life of key metabolites such as d4T by administering an aryl phosphate derivative of d4T having an electron withdrawing substituent on the aryl group and an amino acid substituent on the phosphate group are described. A preferred aryl phosphate derivative of d4T is HI-113 (d4T-5′-[p-bromophenyl methoxyalaninyl phosphate]). The administration of HI-113 results in more prolonged systemic exposure to the key metabolites, Ala-d4T-MP and d4T, than administration of an equimolar dose of either metabolite. Each metabolite has a significantly longer elimination half life when formed in vivo from the administration of HI-113 than when the metabolite is administered directly.
                            本文描述了通过施用芳基上有一个撤电子取代基、
磷酸基上有一个
氨基酸取代基的 d4T 芳基
磷酸衍
生物来延长关键代谢物(如 d4T)消除半衰期的方法。一种优选的 d4T 芳基
磷酸酯衍
生物是 HI-113(d4T-5′-[对
溴苯甲氧基丙
氨酰
磷酸酯])。与服用等摩尔剂量的任何一种代谢物相比,服用 HI-113 会延长全身接触主要代谢物 Ala-d4T-MP 和 d4T 的时间。与直接服用代谢物相比,服用 HI-113 在体内形成的每种代谢物的消除半衰期要长得多。