... Il Farmaco. Volume 59, Issue 4, April 2004, Pages 255–259. ... 6-yl)-1-ethanone or 2-bromo-1-(3,4-dihydro-2H-1,5-benzodioxepin-7-yl)-1-ethanone and refluxed 20 h. Reaction mixture was poured into 200 ml water, acidified with hydrochloric acid to pH 4 and extracted with ...