A recently discovered series of inhibitors of the ATPase function of bacterial type IIA topoisomerases featuring a carboxypyrrole component led us to attempt to replace this group with a potentially bioisosteric carboxypyrazole. Accordingly, synthetic pathways to 2-(4-(1H-pyrazole-5-carboxamido)piperidin-1-yl)thiazole-5-carboxylic acids or 2-(4-(N-methyl-1H-pyrazole-5-carboxamido)piperidin-1-yl)thiazole-5-carboxylic acids featuring an array of substituents on the pyrazole ring were explored. Unfortunately, none of the analogues made were effective on the ATPase function of Mycobacterium tuberculosis gyrase as well on the DNA supercoiling activity of the whole gyrase of M. tuberculosis and Escherichia coli. However, this work is still providing original insights in chemistry as well as in the structure–activity relationships of this series of inhibitors.
最近发现了一系列抑制细菌IIA型拓扑异构酶ATP酶功能的抑制剂,其中包含一个羧基吡咯组分,这促使我们试图用潜在生物等构体羧基吡唑替换该组分。因此,我们探索了合成通向2-(4-(1H-吡唑-5-羧酰胺)哌啶-1-基)噻唑-5-羧酸或2-(4-(N-甲基-1H-吡唑-5-羧酰胺)哌啶-1-基)噻唑-5-羧酸的合成途径,其中在吡唑环上具有一系列取代基。不幸的是,制备的所有类似物对结核分枝杆菌陀螺酶的ATP酶功能以及M. tuberculosis和大肠杆菌的全陀螺酶的DNA超螺旋活性都没有效果。然而,这项工作仍然为这一系列抑制剂的化学和结构-活性关系提供了原创性的见解。