A novel 3-hydroxypyridin-4-one compound of formula I is provided
wherein
R is hydrogen or a group that is removed by metabolism in vivo to provide the free hydroxy compound,
R1 is an aliphatic hydrocarbon group or an aliphatic hydrocarbon group substituted by a hydroxy group or a carboxylic acid ester, sulpho acid ester or a C1-6 alkoxy, C6-aryloxy or C7-10aralkoxy ether thereof,
R3 is selected from hydrogen and C1-6alkyl;
and R4 is selected from hydrogen, C1-6alkyl and a group as described for R2;
characterised in that
R2 is selected from groups
—CONH—R5 (i)
—CH2NHCO—R5 (ii)
—SO2NH—R5 (iii)
—CH2NHSO2—R5 (iv)
—CR6R6OR7 (v)
—CONHCOR5 (viii)
wherein
R5 is selected from hydrogen and optionally hydroxy, alkoxy, or aralkoxy substituted C1-13 alkyl, aryl and C71-13 aralkyl,
R6 is independently selected from hydrogen, C1-13 alkyl, aryl and C7-13 aralkyl,
and R7 is selected from hydrogen, C1-13 alkyl, aryl and C7-13 aralkyl or a pharmaceutically acceptable salt of any such compound
with the proviso that when R7 is hydrogen, R6 is not selected from aryl and with the proviso that the compound is not 1-ethyl-2-(1′-hydroxyethyl)-3-hydroxypyridin-4-one.
提供一种化合物,其为一种新颖的3-
羟基吡啶-4-
酮化合物,其
化学式为I,其中R为
氢或在体内代谢中被去除以提供游离羟基化合物的基团,R1为
脂肪烃基团或被羟基或
羧酸酯、
磺酸酯或其C1-6烷
氧基、C6芳基
氧基或C7-10芳基烷
氧基所取代的
脂肪烃基团,R3从
氢和C1-6烷基中选择;R4从
氢、C1-6烷基和如R2所述的基团中选择;其中R2从以下基团中选择:—CONH—R5 (i)—CH2NHCO—R5 (ii)—SO2NH—R5 (iii)—CH2NHSO2—R5 (iv)—CR6R6OR7 (v)—CONHCOR5 (viii) 其中R5从
氢和可选的羟基、烷
氧基或芳基烷
氧基取代的C1-13烷基、芳基和C7-13芳基烷基中选择,R6独立选择自
氢、C1-13烷基、芳基和C7-13芳基烷基,R7从
氢、C1-13烷基、芳基和C7-13芳基烷基中选择,或任何这种化合物的药用盐;但是当R7为
氢时,R6不选择自芳基,并且化合物不是
1-乙基-2-(1'-羟乙基)-3-
羟基吡啶-4-
酮。