Ultrasound in fatty acid chemistry: facile dehydrobromination of dibromo fatty esters to acetylenic ester derivatives

Add time:09/25/2019    Source:sciencedirect.com

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 functional group, such as hydroxy, chloro or azide group. The structures of the products were characterized by infrared and NMR spectroscopy.

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