11-Bromoundecyl methacrylate (0.32 g, 1.0 mmol), N,N-dimethylallylamine (2.0 ml, 16.9 mmol), and 4-methoxyphenol (trace) were dissolved in 8.0-ml THF under nitrogen atmosphere. After reaction at 60°C for 20 hours, the solvent was evaporated off, and the obtained crude product was washed with diethyl ether to remove the impurities. MA-11-C═C was obtained as a white solid with a yield of 63%.

1H NMR (500 MHz, CDCl3): δ (ppm) 6.09 [s, 1H, CH2═C(CH3)], 5.97 (m, 1H, CH2-CH═CH2), 5.88 (d, 1H, CH2─CH═CH2), 5.77 (d, 1H, CH2─CH═CH2), 5.55 [s, 1H, CH2═C(CH3)], 4.36 (d, 2H, N─CH2-CH═CH2), 4.14 (t, 2H, ─CH2-OOC), 3.49 (t, 2H, ─CH2─N), 3.37 (s, 6H, N─CH3), 1.94 (s, 3H, CH3─C═C), 1.76 (m, 2H, ─CH2─CH2─OOC), 1.67 (m, 2H, ─CH2─CH2─N), and 1.24 to 1.44 [m, 14H, ─(CH2)7─]. MALDI-TOF (positive ion): Calcd m/z for C20H38O2N1+: 324.29; found, 324.31.

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