Abstract:
:In the course of our research on spiro-compounds as neurokinin receptor antagonists, N-[2-aryl-4-(spiro-substituted piperidin-1'-yl)butyl]carboxamides were designed, based on YM-35375 (3) as a lead compound, and evaluated for NK2 receptor-antagonistic activities. Some derivatives inhibited the binding of radio-labeled neurokinin A to the NK2 receptor with IC50 values at the level of 10(-9) M. Among these compounds, (+/-)-1'-[4-(N-benzoyl-N-methylamino)-3- (3,4-dichlorophenyl)butyl]spiro[benzo[c]thiophene-1(3H), 4'-piperidine] 2-oxide (58, YM-38336) showed 10 times more potent NK2 receptor binding affinity than compound 3 (IC50 values of 8.9 and 84 nM, respectively). It showed more potent inhibitory activity (ID50 20 micrograms/kg (i.v.)) against [beta-Ala8]-NKA(4-10)-induced bronchoconstriction in guinea pigs than compound 3 (ID50 41 micrograms/kg (i.v.)). This compound was also effective intraduodenally in the same model, exhibiting an ID50 value of 0.41 microgram/kg.
journal_name
Chem Pharm Bull (Tokyo)journal_title
Chemical & pharmaceutical bulletinauthors
Kubota H,Kakefuda A,Nagaoka H,Yamamoto O,Ikeda K,Takeuchi M,Shibanuma T,Isomura Ydoi
10.1248/cpb.46.242subject
Has Abstractpub_date
1998-02-01 00:00:00pages
242-54issue
2eissn
0009-2363issn
1347-5223journal_volume
46pub_type
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更新日期:2014-01-01 00:00:00