Dehydrobromination of dibromo derivatives of olefinic fatty acids was accomplished using KOH in 20% aqueous ethanol under concomitant ultrasonic irradiation (20 kHz) for 30 min at ambient temperature to give the corresponding acetylenic fatty acid derivatives (52–72% yield). Ten different dibromo fatty acid substrates were used. Products include: fatty acids with a terminal or internal acetylenic bond; acetylenic fatty acids containing an additional ...
