(omega-1)-Fluoroalk-(omega-1)-enoic acids of chain lengths varying bet
ween C-5 and C-15 have been prepared by consecutive bromofluorination
and dehydrobromination of either alk-(omega-1)-enoic acids or alk-(ome
ga-1)-enyl acetates, in the latter case followed by oxidation. The hal
ogen was found to increase the antimycotic properties of the unsaturat
ed fatty acids, 10-fluoroundec-10-enoic acid exhibiting a particularly
strong fungicidal activity.