Trazodone, a well-known antidepressant drug widely used throughout the world, works as a 5-hydroxytryptamine (5-HT2) and α1-adrenergic receptor antagonist and a serotonin reuptake inhibitor. Our research aimed to develop a new method for the synthesis of trazodone and its derivatives. In the known methods of the synthesis of trazodone and its derivatives, organic and toxic solvents are used, and the synthesis time varies from several to several dozen hours. Our research shows that trazodone and its derivatives can be successfully obtained in the presence of potassium carbonate as a reaction medium in the microwave field in a few minutes. As a result of the research work, 17 derivatives of trazodone were obtained, including compounds that exhibit the characteristics of 5-HT1A receptor ligands. Molecular modeling studies were performed to understand the differences in the activity toward 5-HT1A and 5-HT2A receptors between ligand 10a (2-(6-(4-(3-chlorophenyl)piperazin-1-yl)hexyl)-[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one) (5-HT1A Ki = 16 nM) and trazodone. The docking results indicate the lack of the binding of ligand 10a to 5-HT2AR, which is consistent with the in vitro studies. On the other hand, the docking results for the 5-HT1A receptor indicate two possible binding modes. Crystallographic studies support the hypothesis of an extended conformation.

中文翻译：

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微波辅助合成曲唑酮及其衍生物作为新的 5-HT1A 配体：结合和对接研究

曲唑酮是一种在世界范围内广泛使用的知名抗抑郁药，作为 5-羟色胺 (5-HT2) 和 α1-肾上腺素能受体拮抗剂和血清素再摄取抑制剂起作用。我们的研究旨在开发一种合成曲唑酮及其衍生物的新方法。在已知的合成曲唑酮及其衍生物的方法中，使用有机和有毒溶剂，合成时间从几小时到几十小时不等。我们的研究表明，以碳酸钾为反应介质，在微波场几分钟内即可成功获得曲唑酮及其衍生物。作为研究工作的结果，获得了 17 种曲唑酮衍生物，包括表现出 5-HT1A 受体配体特征的化合物。进行分子建模研究以了解配体 10a (2-(6-(4-(3-氯苯基)哌嗪-1-基)己基)-[1, 2,4]triazolo[4,3-a]pyridin-3(2H)-one) (5-HT1A Ki = 16 nM) 和曲唑酮。对接结果表明配体10a缺乏与5-HT2AR的结合，这与体外研究一致。另一方面，5-HT1A 受体的对接结果表明两种可能的结合模式。晶体学研究支持扩展构象的假设。这与体外研究一致。另一方面，5-HT1A 受体的对接结果表明两种可能的结合模式。晶体学研究支持扩展构象的假设。这与体外研究一致。另一方面，5-HT1A 受体的对接结果表明两种可能的结合模式。晶体学研究支持扩展构象的假设。