F. Bois et al., GENISTEIN AND FLUORINATED ANALOGS SUPPRESS AGONIST-INDUCED AIRWAY SMOOTH-MUSCLE CONTRACTION, Bioorganic & medicinal chemistry letters, 7(10), 1997, pp. 1323-1326
4'-fluoro-5,7-dihydroxyisoflavone (DHIF), 2',4'-difluoro-5,7-DHIF and
3',4'-difluoro-5,7-DHIF were synthesized as analogs of the naturally o
ccuring 5,7,4'-trihydroxyisoflavone (genistein). On guinea-pig trachea
, genistein exhibited potent relaxant effect on strips precontracted w
ith acetylcholine, KCl and histamine and a potent inhibitory effect on
KCl-induced contraction. Fluorinated compounds showed less activity.
(C) 1997 Elsevier Science Ltd.