Triazolobenzo- and triazolothienodiazepines as potent antagonists of platelet activating factor
摘要:
A series of [1,2,4]triazolo[4,3-alpha][1,4]benzodiazepines bearing an ethynyl functionality at the 8-position and the isosteric thieno[3,2-f][1,2,4]triazolo[4,3-alpha][1,4]diazepines were prepared and evaluated as antagonists of platelet activating factor. The effects of substitution were explored in in vitro and in vivo test systems designed to measured PAF-antagonistic activity. Results are discussed and compared with previously published data. Many of the compounds had activity superior to WEB 2086, compound 1. In general, the thieno analogues exhibited better oral activity than the corresponding benzodiazepines. The duration of activity upon oral administration was modulated by the substitution on the acetylenic side chain. Compounds 71 and 81 were selected for further pharmacological evaluation as a result of their good oral potency and exceptionally long duration of action.
Piperazinylquinoxalines with central serotoninmimetic activity
作者:William C. Lumma、Richard D. Hartman、Walfred S. Saari、Edward L. Engelhardt、Victor J. Lotti、Clement A. Stone
DOI:10.1021/jm00133a019
日期:1981.1
Regioselective syntheses of substituted 2-chloroquinoxalines and derived 2-(1-piperazinyl)quinoxalines are described. Selectivity in regards to serotonin reuptake blocking and serotoninmimetic activities of the piperazinylquinoxalines is reported. In general, introduction of a 6-substituent into the piperazinylquinoxaline enhanced serotonin reuptake blocking activity and diminished serotoninmimetic activity. Unsubstituted and 3-hydroxypiperazinylquinoxalines had primarily serotoninmimetic activity.
WALSER, ARMIN;FLYNN, THOMAS;MASON, CARL;CROWLEY, HERMAN;MARESCA, CATHERIN+, J. MED. CHEM., 34,(1991) N, C. 1209-1221