- 2,2-DIPHENYLBUTANAMIDE DERIVATIVES AND MEDICINES CONTAINING THE SAME
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2,2-Diphenylbutanamide derivatives represented by the following formula (1): [wherein A represents -(CH2)n- (n is 1 or 2) or a methine (CH) group; when A is -CH2-, B represents a methine group or a nitrogen atom, with A and B forming a single bond; when A is -(CH2)2-, B represents a nitrogen atom, with A and B forming a single bond; when A is a methine group, B represents a quaternary carbon atom, with A and B forming a double bond; each of R1 and R2, which are identical to or different from each other, represents a hydrogen atom, a lower alkyl group, or a cycloalkyl group, or R1 and R2 may form a heterocyclic ring together with the adjacent nitrogen atom; and Ar represents an optionally substituted phenyl group, bicyclic aromatic ring, monocyclic heterocyclic ring, bicyclic heterocyclic ring, or fluorene group]; or salts of the derivatives. The derivatives or salts thereof exhibit excellent μ-opioid agonist activity and analgesic activity against neuropathic pain, and are useful as medicines such as peripheral analgesic drugs and neuropathic pain relieving drugs.
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- New μ-opioid receptor agonists with phenoxyacetic acid moiety
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New μ-opioid receptor (MOR) agonists containing 4-hydroxypiperidine, piperidine and piperazine moieties were synthesized and evaluated to find a peripheral opioid analgesic. Among the synthesized compounds, [2-[1-[3-(N,N-dimethylcarbamoyl)-3,3-diphenylpropyl]-4-hydroxypiperidin-4-yl] phenoxy]acetic acid (8: SS620) having phenoxyacetic acid and 4-hydroxypiperidine moieties showed the highest agonist potency on the MOR in an isolated guinea-pig ileum preparation, and it also had selectivity to the human MOR expressed in Chinese hamster ovary (CHO)-K1 cells compared with the same types of δ- and κ-opioid receptors (DOR and KOR). In addition, compound 8 showed a 10 times more potent MOR agonist activity than loperamide. Furthermore, compound 8 showed a peripheral analgesic activity in vivo screening on rat.
- Sato, Susumu,Komoto, Teruo,Kanamaru, Yoshihiko,Kawamoto, Noriyuki,Okada, Tomomi,Kaiho, Terumitsu,Mogi, Kinichi,Morimoto, Shinichi,Umehara, Norimitsu,Koda, Tadayuki,Miyashita, Akira,Sakamoto, Takao,Niino, Yasuhiro,Oka, Tetsuo
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p. 292 - 297
(2007/10/03)
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