Ligand??Based Design, Synthesis, and Pharmacological Evaluation of 3??Methoxyquinoxalin??2??carboxamides as Structurally Novel Serotonin Type??3 Receptor …
Abstract Employing a ligand-based approach, 3-methoxyquinoxalin-2-carboxamides were designed as serotonin type-3 (5-HT 3) receptor antagonists and synthesized from the starting material o-phenylenediamine in a sequence of reactions. The structures of the synthesized compounds were confirmed by spectral data. These carboxamides were investigated for their 5-HT 3 receptor antagonisms in longitudinal muscle myenteric plexus ...