Structure Activity Relationships of New Inhibitors of Mammalian 2,3-Oxidosqualene Cyclase Designed from Isoquinoline Derivatives.
作者:Jean Binet、Didier Thomas、Abdellah Benmbarek、Daniel de Fornel、Patrice Renaut
DOI:10.1248/cpb.50.316
日期:——
We have designed more potent inhibitors from the previously reported LF 05-0038, a 6-isoquinolinol based inhibitor of 2,3-oxidosqualene cyclase (IC50: 1.1 μM). Replacement of the 3-OH group by various 3-substituted amino groups, and modification of the alkyl chain borne by the endocyclic nitrogen led to inhibitors with IC50 in the range of 0.15 to 1 μM. In a second step, opening of the bicyclic ring system afforded the corresponding aminoalkylpiperidines which were slightly more potent. Finally, introduction of suitable aromatic containing moieties on the piperidine nitrogen yielded very potent inhibitors such as 20x (IC50=18 nM) easy to synthesize and achiral. The recent availability of the crystal structure of squalene-hopene cyclase allowed us to construct a three-dimensional (3D) model of the related 2,3-oxidosqualene cyclase (OSC) which was tentatively used to describe the possible mode of binding of our compounds and which can be useful for designing new inhibitors.
我们从之前报告的LF 05-0038(一种基于6-异喹啉醇的2,3-氧化甾烯环化酶抑制剂,IC50:1.1 μM)中设计了更有效的抑制剂。通过用各种3-取代氨基取代3-OH基团,以及修饰内环氮原子所带的烷基链,获得了IC50在0.15到1 μM范围的抑制剂。在第二步中,打开双环系统得到相应的氨基烷基哌啶,这些化合物的活性稍强。最后,在哌啶氮上引入合适的含芳香族基团,得到了很强的抑制剂,例如20x(IC50=18 nM),其合成简单且不具有手性。近期可获得的甾烯-霍彭环化酶的晶体结构,使我们得以构建相关的2,3-氧化甾烯环化酶(OSC)的三维(3D)模型,并初步用于描述我们的化合物可能的结合模式,这对设计新抑制剂是非常有用的。