1: With sodium hydride in tetrahydrofuran 0.5 h; Cooling with ice; 2: With 15-crown-5 in tetrahydrofuran 14 h; Reflux;

tetra-(n-butyl)ammonium iodide; sodium hydride in N,N-dimethyl-formamide T=40°C;

1: 1-hydroxy-2-hydroxymethyl-2-propene With sodium hydride in tetrahydrofuran; mineral oil T=0°C; 0.5 h; Inert atmosphere; 2: benzyl bromide With tetra-(n-butyl)ammonium iodide in tetrahydrofuran; mineral oil T=0 - 20°C; Inert atmosphere; 3: With water in tetrahydrofuran; mineral oil T=0°C; Inert atmosphere;

1: With ozone in dichloromethane T=-60°C; 0.583333 h; 2: With triphenylphosphine in dichloromethane Further stages.;