title: Pharmacophore based synthesis of 3-chloroquinoxaline-2-carboxamides as serotonin3 (5-HT3) receptor antagonist.
abstract: A series of 3-chloroquinoxaline-2-carboxamides were designed and prepared by the condensation of 3-chloro-2-quinoxaloylchloride with appropriate Mannich bases of the p-aminophenol in the microwave environment. The synthesized compounds were evaluated for serotonin(3) (5-HT(3)) receptor antagonistic activities in longitudinal muscle-myenteric plexus (LMMP) preparation from guinea pig ileum against the 5-HT(3) agonist, 2-methyl-5-HT. Compound 3g exhibited comparable 5-HT(3) antagonistic activity (pA(2) 6.4) to that of standard antagonist Ondansetron (pA(2) 6.9), while the other compounds exhibited mild to moderate 5-HT(3) antagonistic activities.
authors.affiliation: Pharmacy Group, Birla Institute of Technology & Science; Pilani-333 031, India. rmahesh@bits-pilani.ac.in
authors.forename: Radhakrishnan
authors.initials: R
authors.lastname: Mahesh
authors.forename: Ramachandran Venkatesha
authors.initials: RV
authors.lastname: Perumal
authors.forename: Pandi Vijaya
authors.initials: PV
authors.lastname: Pandi
mesh_terms: D000818:Animals; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects; D066298:In Vitro Techniques; D008297:Male; D015394:Molecular Structure; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D009197:Myenteric Plexus; D011810:Quinoxalines / Q000138:chemical synthesis* / Q000494:pharmacology; D012701:Serotonin / Q000031:analogs & derivatives* / Q000494:pharmacology; D058831:Serotonin 5-HT3 Receptor Antagonists; D012702:Serotonin Antagonists / Q000138:chemical synthesis / Q000494:pharmacology; D013329:Structure-Activity Relationship
chemical_list: D011810:Quinoxalines; D058831:Serotonin 5-HT3 Receptor Antagonists; D012702:Serotonin Antagonists; D012701:Serotonin; C045918:2-methyl-5-HT