申请人:BTG International Limited
公开号:US06448273B1
公开(公告)日:2002-09-10
A compound of formula I
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, and
R3 is selected from hydrogen and C1-6 alkyl;
characterized in that
R2 is selected from groups
(i) —CONH—R5 (ii)—CR6R6OR7 (iii) —CONHCOR5 and (iv) —CON(CnH2n+1)2
R4 is selected from hydrogen, C1-6 alkyl and a group as described for R2;
R5 is selected from hydrogen and optionally hydroxy, alkoxy, aryloxy or aralkoxy substituted C1-13 alkyl, aryl and C7-13 alkyl
R6 is independently selected from hydrogen and C1-13 alkyl,
R7 is selected from hydrogen, C1-13 alkyl, aryl and C7-13 aralkyl or a pharmaceutically acceptable salt of any such compound
and CnH2n+1 is C1-6alkyl
with the proviso that the compound is not one of 1-ethyl-2-(1′-hydroxyethyl)-3-hydroxypyridin-4-one and 1-methyl-2-hydroxymethyl-3-hydroxypyridoin-4-one.
式I的化合物其中R是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是脂肪烃基或被羟基或羧酸酯、磺酸酯或其C1-6烷氧基、C6-芳氧基或C7-10芳基烷氧基取代的脂肪烃基,R3选自氢和C1-6烷基;其特征在于R2选自以下基团(i) —CONH—R5 (ii)—CR6R6OR7 (iii) —CONHCOR5 和 (iv) —CON(CnH2n+1)2 R4选自氢、C1-6烷基和与R2描述的基团相同的基团;R5选自氢和可选的羟基、烷氧基、芳氧基或芳基烷氧基取代的C1-13烷基、芳基和C7-13烷基;R6独立地选自氢和C1-13烷基,R7选自氢、C1-13烷基、芳基和C7-13芳基烷基或任何这类化合物的药用可接受盐,CnH2n+1是C1-6烷基,但该化合物不是1-乙基-2-(1'-羟乙基)-3-羟基吡啶-4-酮和1-甲基-2-羟甲基-3-羟基吡啶-4-酮中的任何一个。