5-(3-Cyclopentyl-2-thioxo-2,3-dihydro-1H-benzimidazol-5-yl)-1-methyl-1H-pyrrole-2-carbonitrile: A novel, highly potent, selective, and orally active non-steroidal progesterone receptor agonist

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• 作者：Puwen Zhang ; Eugene Terefenko ; Jeffrey Kern ; Andrew Fensome ; Eugene Trybulski ; Ray Unwalla ; Jay Wrobel ; Susan Lockhead ; Yuan Zhu ; Jeffrey Cohen ; Margaret LaCava ; Richard C. Winneker ; Zhiming Zhang
• 关键词：Progesterone receptor (PR) ; PR agonists ; PR antagonists ; Non-steroidal
• 刊名：Bioorganic and Medicinal Chemistry
• 出版年：2007
• 期刊代码：9_09680896
• 类别：ch
• 出版时间：15 October 2007
• 卷：15
• 期：20
• 页码：6556-6564
• 文件大小：403 K

摘要

We have recently discovered 5-(3-cyclopentyl-2-thioxo-2,3-dihydro-1H-benzimidazol-5-yl)-1-methyl-1H-pyrrole-2-carbonitrile (14) as a potent, selective, and orally active non-steroidal progesterone receptor (PR) agonist. Compound 14 and its analog 13 possessed sub-nanomolar in vitro potency (EC₅₀ 0.1–0.5 nM) in the T47D alkaline phosphatase assay, similar to that of the steroidal PR agonist medroxyprogesterone acetate (MPA). In contrast to MPA, 14 was highly selective (>500-fold) for the PR over both glucocorticoid and androgen receptors. In the rat uterine decidualization and complement component C3 models, 14 had oral ED₅₀ values of 0.02 and 0.003 mg/kg, respectively, and was from 6- to 20-fold more potent than MPA. In the monkey ovulation inhibition model, compound 14 was also highly efficacious and potent with an oral ED₁₀₀ of 0.03 mg/kg.