Synthesis and characterization of new quaternary ammonium surfactant [C18-Dabco][Br] and its catalytic application in the synthesis of spirocarbocycles under ultrasonic condition
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A novel DABCO-based cationic surfactant [C18-Dabco][Br] has been easily synthesized by the reaction of DABCO and octadecyl bromide in acetonitrile at room temperature in excellent yield. The synthesized surfactant was fully characterized by various techniques like FT-IR, 1H NMR, 13C NMR, LC–MS and TGA-DTA analysis. Furthermore, the critical micelle concentration of the surfactant was determined by the conductivity measurement method. The activity of the [C18-Dabco][Br] has been demonstrated for the one-pot synthesis of spirocarbocycles under ultrasonic conditions in water. The presence of the long alkyl chain acts as the hydrophobic part while the free tertiary nitrogen site in the surfactant acts as a base and enhances the overall catalytic activity.
KeywordsDABCO-based cationic surfactants [C18-Dabco][Br] Spirocarbocycles Water medium Ultrasound
One of the authors, Mr. Trushant Lohar, is very grateful to the Department of Science and Technology (DST), New Delhi, for awarding a DST-INSPIRE Fellowship (IF 140918).
- 10.B. Lindman, H. Wennerstrom, Micelles Amphiphile Aggregation in Aqueous solution (Spinger, New York, 1980)Google Scholar
- 22.B. Thadhaney, D. Sain, G. Pernawat, G.L. Talesara, Indian J. Chem. 49, 368 (2010)Google Scholar