Inhibition of Adenosine Deaminase by Novel 5:7 Fused Heterocycles Containing the Imidazo[4,5-<i>e</i>][1,2,4]triazepine Ring System: A Structure−Activity Relationship Study
作者:Ayub Reayi、Ramachandra S. Hosmane
DOI:10.1021/jm0304257
日期:2004.2.1
from 4-nitroimidazole, others were derived from 1a through simple exchange reactions with the appropriate alcohols. The observed kinetics profiles and K(i) values suggest that the target compounds are competitive inhibitors that bind 6-9 orders of magnitude less tightly to the enzyme. Compounds 1c and 1d were the most active in the series with K(i)'s ranging from 12 to 15 microM.
作为探索结构活性关系的程序的一部分,该结构关系对甲酰霉素对腺苷脱氨酶的极紧密结合抑制特性,是一系列包含咪唑[4,5-e] [1,2,4]的类似物(1a-1h)。已经合成了triazepine环系统,并针对哺乳动物的腺苷脱氨酶体外筛选了抑制活性。尽管化合物1a和1b是从4-硝基咪唑开始的五个步骤中合成的,但其他化合物则是通过与适当的醇进行简单的交换反应而衍生自1a的。观察到的动力学曲线和K(i)值表明目标化合物是竞争性抑制剂,与酶的结合强度降低了6-9个数量级。化合物1c和1d是该系列中活性最高的化合物,K(i)范围为12至15 microM。