The synthesis and SAR of a novel 3-benzazepine series of 5-HT2C agonists is described. Compound 7d (lorcaserin, APD356) was identified as one of the more potent and selective compounds in vitro (pEC50 values in functional assays measuring [(3)H]phosphoinositol turnover: 5-HT2C = 8.1; 5-HT2A = 6.8; 5-HT2B = 6.1) and was potent in an acute in vivo rat food intake model upon oral administration (ED50 at 6 h = 18 mg/kg). Lorcaserin was further characterized in a single-dose pharmacokinetic study in rat (t1/2 = 3.7 h; F = 86%) and a 28-day model of weight gain in growing Sprague-Dawley rat (8.5% decrease in weight gain observed at 36 mg/kg b.i.d.). Lorcaserin was selected for further evaluation in clinical trials for the treatment of obesity.

中文翻译：

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选择性5-羟色胺5-HT2C受体激动剂（1R）-8-氯-2,3,4,5-四氢-1-甲基-1H-3-苯并ze庚因（Lorcaserin）的发现及其构效关系肥胖。

描述了新型3-苯并ze庚因系列的5-HT 2C激动剂的合成和SAR。在体外，化合物7d（lorcaserin，APD356）被鉴定为更有效和选择性的化合物之一（在功能测定中，通过[[3] H]磷酸肌醇周转率测定的pEC50值：5-HT2C = 8.1; 5-HT2A = 6.8; 5- HT2B = 6.1），并且在口服后在急性体内大鼠食物摄入模型中有效（在6 h时的ED50 = 18 mg / kg）。Lorcaserin在大鼠单剂量药代动力学研究中进一步表征（t1 / 2 = 3.7小时； F = 86％），以及在生长的Sprague-Dawley大鼠中28天的体重增加模型（在60℃时观察到体重增加减少8.5％） 36 mg / kg出价）。选择洛卡西林在肥胖症的临床试验中进行进一步评估。