期刊
JOURNAL OF MEDICINAL CHEMISTRY
卷 51, 期 16, 页码 5019-5034出版社
AMER CHEMICAL SOC
DOI: 10.1021/jm800463f
关键词
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The CB2 receptor is an attractive therapeutic target for analgesic and anti-inflammatory agents. Herein we describe the discovery of a novel class of oxadiazole derivatives from which potent and selective CB2 agonist leads were developed. Initial hit 7 was identified from a cannabinoid target-biased library generated by virtual screening of sample collections using a phamacophore model in combination with a series of physicochemical filters. 7 was demonstrated to be a selective CB2 agonist (CB2 EC50 = 93 nM, E-max = 98%, CB1 EC50 > 10 mu M). However, this compound exhibited poor solubility and relatively high clearance in rat, resulting in low oral bioavailability. In this paper, we report detailed SAR studies on 7 en route toward improving potency, physicochemical properties, and Solubility. This effort resulted in identification of 63 that is a potent and selective agonist at CB2 (EC50 = 2 nM, E-max = 110%) with excellent pharmacokinetic properties.
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