title: New mu-opioid receptor agonists with piperazine moiety.
abstract: New mu-opioid receptor (MOR) agonists containing piperazine and homopiperazine moieties in the structures were synthesized and their affinities to and agonist potencies on MOR were evaluated. Among the synthesized compounds, 4-[4-(2-methoxyphenyl)piperazin-1-yl]-N,N-dimethyl-2,2-diphenylbutanamide (20 Aa) showed the highest affinity to the human MOR expressed in Chinese hamster ovary (CHO)-K1 cells, and the highest agonist potency on the MOR in isolated guinea-pig ileum preparation.
authors.affiliation: Central Research Labs., SSP Co., Ltd., Narita, Chiba, Japan. Teruo.Komoto@ssp.co.jp
authors.forename: T
authors.initials: T
authors.lastname: Komoto
authors.forename: T
authors.initials: T
authors.lastname: Okada
authors.forename: S
authors.initials: S
authors.lastname: Sato
authors.forename: Y
authors.initials: Y
authors.lastname: Niino
authors.forename: T
authors.initials: T
authors.lastname: Oka
authors.forename: T
authors.initials: T
authors.lastname: Sakamoto
mesh_terms: D000818:Animals; D016466:CHO Cells; D006224:Cricetinae; D020875:Enkephalin, Ala(2)-MePhe(4)-Gly(5)- / Q000494:pharmacology; D006168:Guinea Pigs; D006801:Humans; D007082:Ileum / Q000187:drug effects; D066298:In Vitro Techniques; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D013058:Mass Spectrometry; D009130:Muscle, Smooth / Q000187:drug effects; D010879:Piperazines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D017473:Receptors, Opioid, kappa / Q000037:antagonists & inhibitors; D017450:Receptors, Opioid, mu / Q000819:agonists*; D013055:Spectrophotometry, Infrared
chemical_list: D007202:Indicators and Reagents; D010879:Piperazines; D017473:Receptors, Opioid, kappa; D017450:Receptors, Opioid, mu; D020875:Enkephalin, Ala(2)-MePhe(4)-Gly(5)-