Synthesis and biological activity of 5-(4-chlorobenzoyl)-4-(hydroxymethyl)-1-methyl-1H-pyrrole-2-acetic acid, a major metabolite of zomepirac sodium
作者:Neal G. Anderson、John R. Carson
DOI:10.1021/jm00175a022
日期:1980.1
5-(4-Chlorobenzoyl)-4-(hydroxymethyl)-1-methyl-1H-pyrrole-2-acetic acid (2), the major oxidative metabolite of zomepirac (1), was synthesized starting with ethyl 5-(4-chlorobenzoyl)-1,4-dimethyl-1H-pyrrole-2-acetate (3), the ethyl ester of 1. Compound 3 was oxidized with selenium dioxide to afford the alpha-oxoester, 5. Bromination of 5 with N-bromosuccinimide produced bromomethylpyrrole 7, and reaction of 7
5-(4-氯苯甲酰基)-4-(羟甲基)-1-甲基-1H-吡咯-2-乙酸(2)是Zomepirac的主要氧化代谢物(1),是从乙基5-(4-氯苯甲酰基)-1,4-二甲基-1H-吡咯-2-乙酸酯(3),为1.的乙酯。用二氧化硒氧化化合物3,得到α-氧代酸酯。5.用N-溴代琥珀酰亚胺溴化5。溴甲基吡咯7和7与相应的乙酰氧基甲基吡咯8生成的乙酸盐反应。如果8生成9,则硫化氢选择性地还原侧链羰基。9的皂化生成标题化合物2。 Zomepirac的分离代谢产物(1)。生物测试表明,该代谢物基本上没有与zomepirac相关的生物活性。