Synthesis and Structure−Activity Relationships of a Novel Series of 2,3,5,6,7,9-Hexahydrothieno[3,2-b]quinolin-8(4H)-one 1,1-Dioxide KATP Channel Openers: Discovery of (−)-(9S)-9-(3-Bromo-4-fluorophenyl)-2,3,5,6,7,9- hexahydrothieno[3,2-b]quinolin-8(4H)-one 1,1-Dioxide (A-278637), a Potent KATP Opener That Selectively Inhibits Spontaneous Bladder Contractions
摘要:
Structure-activity relationships were investigated on a novel series of sulfonyldihydropyridine-containing K-ATP openers. Ring sizes, absolute stereochemistry, and aromatic substitution were evaluated for K-ATP activity in guinea pig bladder cells using a fluorescence-based membrane potential assay and in a pig bladder strip assay. The inhibition of spontaneous bladder contractions in vitro was also examined for a select group of compounds. All compounds studied showed greater potency to inhibit spontaneous bladder contractions relative to their potencies to inhibit contractions elicited by electrical stimulation. In an anesthetized pig model of myogenic bladder overactivity, compound 14 and (-)-cromakalim 1 were found to inhibit spontaneous bladder contractions in vivo at plasma concentrations lower than those that affected hemodynamic parameters. Compound 14 showed approximately 5-fold greater selectivity than I in vivo and supports the concept that bladder-selective K-ATP channel openers may have utility in the treatment of overactive bladder.
The invention relates, as novel and useful industrial products, to triaromatic compounds, which are vitamin D analogues, of general formula (I):
1
and also to a method for preparing them and to their use in pharmaceutical compositions intended for use in human or veterinary medicine, or alternatively in cosmetic compositions.
Plant antitumor agents. 29. Synthesis and biological activity of ring D and ring E modified analogs of camptothecin
作者:Allan W. Nicholas、Mansukh C. Wani、Govindarajan Manikumar、Monroe E. Wall、Kurt W. Kohn、Yves Pommier
DOI:10.1021/jm00165a014
日期:1990.3
activity for 3 and no activity for 4. It is evident that the pyridone ring D is essential for antitumor activity. Three E ringmodifiedanalogues of camptothecin, 2d-f, are described in which the net change is replacement of O by N in ring E. Compared to (20S)-camptothecin (1a) or (20RS)-camptothecin (1b), the ring E modifiedanalogues 2d-f display little or no cytotoxic activity, greatly reduced effect