Novel, Highly Potent Adenosine Deaminase Inhibitors Containing the Pyrazolo[3,4-<i>d</i>]pyrimidine Ring System. Synthesis, Structure−Activity Relationships, and Molecular Modeling Studies
作者:Federico Da Settimo、Giampaolo Primofiore、Concettina La Motta、Sabrina Taliani、Francesca Simorini、Anna Maria Marini、Laura Mugnaini、Antonio Lavecchia、Ettore Novellino、Daniela Tuscano、Claudia Martini
DOI:10.1021/jm050136d
日期:2005.8.1
This study reports the synthesis of a number of 1- and 2-alkyl derivatives of the 4-aminopyrazolo[3,4-d]pyrimidine (APP) nucleus and their evaluation as inhibitors of ADA from bovine spleen. The 2-substituted aminopyrazolopyrimidines proved to be potent inhibitors, most of them exhibiting K(i) values in the nanomolar/subnanomolar range. In this series the inhibitory activity is enhanced with the increase
这项研究报告了4-氨基吡唑并[3,4-d]嘧啶(APP)核的许多1-和2-烷基衍生物的合成及其作为牛脾中ADA抑制剂的评估。事实证明2-取代的氨基吡唑并嘧啶是有效的抑制剂,它们大多数在纳摩尔/亚纳摩尔范围内表现出K(i)值。在该系列中,抑制活性随烷基链长度的增加而增强,正癸基取代基达到最大值。在正癸基链中插入2'-羟基得到3k,其(R)-异构体显示出该系列的最高抑制潜能(K(i)0.053 nM),显示出比其高2个数量级的活性。 (+)-EHNA(K(i)1.14 nM)的平均值作为参考标准。