1: 3,7,11-trimethyl-1,3,6,10-tetraene-dodecyl diethyl phosphonate With n-butyllithium in tetrahydrofuran; hexane T=-40°C; 2 h; Inert atmosphere; 2: dodecan-1,12-dial in tetrahydrofuran; hexane T=-40 - 30°C; 1.58333 h;

1: 3,7,11-trimethyl-1,3,6,10-tetraene-dodecyl diethyl phosphonate With potassium tert-butylate in tetrahydrofuran; dimethyl sulfoxide T=5°C; 2 h; Inert atmosphere; 2: 2,7-dimethylocta-2,4,6-triene-1,8-dial in tetrahydrofuran; dimethyl sulfoxide T=5 - 25°C; 1.58 h; 3: in chloroform 2 h; RefluxInert atmosphere;