Nonpeptidic Inhibitors of Human Leukocyte Elastase. 3. Design, Synthesis, X-ray Crystallographic Analysis, and Structure-Activity Relationships for a Series of Orally Active 3-Amino-6-phenyl-2-pyridinyl Trifluoromethyl Ketones
作者:Peter R. Bernstein、Don Andisik、Prudence K. Bradley、Craig B. Bryant、Christopher Ceccarelli、James R. Damewood、Roger Earley、Philip D. Edwards、Scott Feeney
DOI:10.1021/jm00046a016
日期:1994.9
enzyme. One exception to this generality is 13k, which is substituted with a (4-acetamidophenyl)sulfonyl group. This compound has a K(i) of 0.7 nM and is, in vitro, the most potent inhibitor in the series. In contrast, variation of the N-3 substituent was found to have a dramatic effect on activity after oral administration. Several analogs, including the parent amine, 7, formamide, 2u, benzyl sulfamide
报道了一系列人类白细胞弹性蛋白酶(HLE)的非肽抑制剂。这些基于三氟甲基酮的抑制剂含有3-氨基-6-苯基吡啶酮基团作为中心模板。描述了在基于仓鼠的HLE诱导的肺损伤模型中,这些抑制剂中N-3取代基的变化对体外效能,物理特性和口服活性的影响。在此位置上对体外效能影响很小的各种取代基支持以下观点:分子的该区域不会与酶强烈相互作用。这种一般性的一个例外是13k,它被(4-乙酰氨基苯基)磺酰基取代。该化合物的K(i)为0.7 nM,在体外是该系列中最有效的抑制剂。相反,发现N-3取代基的变化对口服给药后的活性具有显着影响。当以2.5 mg / kg的口服剂量给药时,包括母体胺7,甲酰胺2u,苄基磺酰胺13e和苄基磺酰胺13f在内的几种类似物显示出显着的活性。通过体外SAR结果和13d与猪胰弹性蛋白酶(PPE)(一种密切相关的酶)之间的复合物的X射线晶体学分析,获得了基于模型的设计概念的支持。