N-dodecyl-3-(4-methylpiperazin-1-yl)propanamide 30.0 g (0.088 moles), 1-bromohexane 14.6 g (0.088 moles), and 11.2 g of isopropyl alcohol are charged into a 3-neck 250-mL round bottom flask equipped with a thermocouple, and reflux condenser. The mixture is agitated using a magnetic stirring bar and heated to reflux overnight. Then, the reaction mass is cooled down to about 40° C. and diluted to 40% active solids with 56 g of methanol. Evidence of the chemical transformation is observed by TLC analysis using a 4:1 CHCl3/MeOH as mobile phase. The final product is a light brown solution at ambient temperature. 1H-NMR (300 MHz, CDCl3): δ 3.10 (m, 5H), 2.90 (m, 10H), 2.36 (m, 4H), 1.34 (bs, 2H), 0.80 (m, 26H), 0.44 (m, 6H). 13C-NMR (75 MHz, CDCl3): δ 170.94, 62.39, 59.24, 52.17, 48.35, 45.12, 38.39, 32.50, 30.75, 30.12, 28.52, 28.49, 28.38, 28.18, 28.18, 25.98, 24.85, 24.11, 21.50, 21.28, 20.74, 12.92, 12.74.
