申请人:BRITISH TECHNOLOGY GROUP LTD
公开号:EP0494754A1
公开(公告)日:1992-07-15
3-Hydroxypyridin-4-ones of formula (I)
in which R₁ is selected from hydrogen, C₁₋₃ aliphatic hydrocarbon groups, 2-hydroxyethyl, C₁₋₄ aliphatic hydrocarbon groups substituted by a single carboxy, sulpho, sulphamoyl or N-methyl or N-ethyl sulphamoyl group, and an ethyl group substituted at the 1-or 2-position by a carboxy, sulpho, sulphamoyl or N-methyl or N-ethyl sulphamoyl group and at the 2-position by a hydroxy group, and R₂, R₃ and R₄ are each separately selected from hydrogen, C₁₋₃ aliphatic hydrocarbon groups, hydroxymethyl, 1-hydroxyethyl, 2-hydroxyethyl, 2-methoxymethyl, C₁₋₄ aliphatic hydrocarbon groups substituted by a single carboxy, sulpho, sulphamoyl or N-methyl or N-ethyl sulphamoyl group, and an ethyl group substituted at the 1-or 2-position by a carboxy, sulpho, sulphamoyl or N-methyl or N-ethyl sulphamoyl group and at the 2-position by a hydroxy group, but with the provisos firstly that one of R₁ to R₄ is a C₁₋₄ aliphatic hydrocarbon group substituted by a single carboxy, sulpho, sulphamoyl or N-methyl or N-ethyl sulphamoyl group, or an ethyl group substituted at the 1- or 2-position by a carboxy, sulpho, sulphamoyl or N-methyl or N-ethyl sulphamoyl group and at the 2-position by a hydroxy group, secondly that either R₂ or R₃ is a group other than hydrogen and thirdly that the total number of atoms other than hydrogen present in R₁ to R₄ is no more than eight, the compound optionally being in the form of a physiologically acceptable salt and/or pro-drug thereof, are of value for the treatment of conditions caused by iron dependent parasites, particularly malaria.
式(I)中,3-羟基吡啶-4-酮,其中R₁选自氢,C₁₋₃脂肪烃基,2-羟乙基,C₁₋₄脂肪烃基,被单个羧基,磺酰基,磺酰胺基或N-甲基或N-乙基磺酰胺基取代,以及在1-或2-位置被羧基,磺酰基,磺酰胺基或N-甲基或N-乙基磺酰胺基取代的乙基基团,在2-位置被羟基取代;R₂,R₃和R₄各自单独选自氢,C₁₋₃脂肪烃基,羟甲基,1-羟基乙基,2-羟基乙基,2-甲氧基甲基,C₁₋₄脂肪烃基,被单个羧基,磺酰基,磺酰胺基或N-甲基或N-乙基磺酰胺基取代,以及在1-或2-位置被羧基,磺酰基,磺酰胺基或N-甲基或N-乙基磺酰胺基取代的乙基基团,在2-位置被羟基取代,但前提是首先R₁至R₄中有一个是被单个羧基,磺酰基,磺酰胺基或N-甲基或N-乙基磺酰胺基取代的C₁₋₄脂肪烃基,或在1-或2-位置被羧基,磺酰基,磺酰胺基或N-甲基或N-乙基磺酰胺基取代的乙基基团,在2-位置被羟基取代;其次,R₂或R₃为除氢之外的基团;第三,除氢之外的原子总数不超过8个。该化合物可选为生理上可接受的盐和/或前药形式,对于治疗由铁依赖性寄生虫引起的疾病特别是疟疾具有价值。