CCR5 Antagonists as Anti-HIV-1 Agents. 1. Synthesis and Biological Evaluation of 5-Oxopyrrolidine-3-carboxamide Derivatives
作者:Shinichi Imamura、Yuji Ishihara、Taeko Hattori、Osamu Kurasawa、Yoshihiro Matsushita、Yoshihiro Sugihara、Naoyuki Kanzaki、Yuji Iizawa、Masanori Baba、Shohei Hashiguchi
DOI:10.1248/cpb.52.63
日期:——
A novel lead compound, N-3-[4-(4-fluorobenzoyl)piperidin-1-yl]propyl}-1-methyl-5-oxo-N-phenylpyrrolidine-3-carboxamide (1), was identified as a CCR5 antagonist by high-throughput screening using [125I]RANTES and CCR5-expressing CHO cells. The IC50 value of 1 was 1.9 μM. In an effort to improve the binding affinity of 1, a series of 5-oxopyrrolidine-3-carboxamides was synthesized. Introduction of 3,4-dichloro substituents to the central phenyl ring (10i, IC50=0.057 μM; 11b, IC50=0.050 μM) or replacing the 1-methyl group of the 5-oxopyrrolidine moiety with a 1-benzyl group (12e, IC50=0.038 μM) was found to be effective for improving CCR5 affinity. Compound 10i, 11b, and 12e also inhibited CCR5-using HIV-1 envelope-mediated membrane fusion with IC50 values of 0.44, 0.19, and 0.49 μM, respectively.
一种新型的铅化合物N-3-[4-(4-氟苯甲酰)piperidin-1-基]丙基}-1-甲基-5-氧代-N-苯基吡咯烷-3-羧酰胺(1)通过高通量筛选与[125I]RANTES和CCR5表达的CHO细胞被鉴定为CCR5拮抗剂。化合物1的IC50值为1.9 μM。为了提高化合物1的结合亲和力,合成了一系列5-氧代吡咯烷-3-羧酰胺。向中心苯环引入3,4-二氯取代基(10i,IC50=0.057 μM;11b,IC50=0.050 μM)或用1-苄基取代5-氧代吡咯烷部分的1-甲基基团(12e,IC50=0.038 μM)被发现有效提高了对CCR5的亲和力。化合物10i、11b和12e也分别以0.44、0.19和0.49 μM的IC50值抑制了CCR5使用的HIV-1包膜介导的膜融合。