Microwave-assisted synthesis of quinoline, isoquinoline, quinoxaline and quinazoline derivatives as CB2 receptor agonists

Add time:07/12/2019    Source:sciencedirect.com

Quinoline, isoquinoline, quinoxaline, and quinazoline derivatives were synthesized using microwave-assisted synthesis and their CB1/CB2 receptor activities were determined using the [35S]GTPγS binding assay. Most of the prepared quinoline, isoquinoline, and quinoxalinyl phenyl amines showed low-potency partial CB2 receptor agonists activity. The most potent CB2 ligand was the 4-morpholinylmethanone derivative (compound 40e) (−log EC50 = 7.8; Emax = 75%). The isoquinolin-1-yl(3-trifluoromethyl-phenyl)amine (compound 26c) was a high efficacy CB2 agonist (−log EC50 = 5.8; Emax = 128%). No significant CB1 receptor activation or inactivation was shown in these studies, except 40e, which showed weak CB1 agonist activity (CB1 −log EC50 = 5.0). These ligands serve as novel templates for the development of selective CB2 receptor agonist.

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