1: 1-O-undecyl glycerol With di(n-butyl)tin oxide in toluene 5 h; Heating; 2: 1-bromo undecane With cesium fluoride in N,N-dimethyl-formamide T=20°C; 24 h;

1.1: NaOH / H2O / 1 h / 80 °C 1.2: Bu4NBr / H2O / 7 h / Heating 2.1: aq. HCl / ethanol / 1 h / Heating 3.1: dibutyltin oxide / toluene / 5 h / Heating 3.2: 3.87 g / CsF / dimethylformamide / 24 h / 20 °C View Scheme

N,N,N',N',N'',N''-hexamethylphosphoric triamide; sodium hydride 1.) THF, reflux, 1 h, 2.) THF, reflux, 18 h; Yield given. Multistep reaction;