×. C?-h, MS (ESI): m/z exact mass calculated for C 29 H 62 N [M ? I ? ]: 424.4877. Found: 424.4881 General procedure for synthesis of N-butyl,N-methyl,N-nony- loctadecan-1-ammonium iodide (11b) In a 10 mL pressure resistant vial, 0.28 g of compound 10 (0.70 mmol) was dissolved in a 1 : 1 mixture of acetone and acetonitrile. The solution was cooled down to 0 °C and 0.39 mL of butyl iodide (3.47 mmol, 5 eq.) was added. The vial was closed and heated to 80 °C for 72 hours. The reaction mixture was concentrated under reduced pressure to yield compound 11b as a yellow waxy solid (0.40 g, 97%). 1 H-NMR (400 MHz, × C? H 2 N), pp.31-39

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