hydrogenchloride Reflux;

1: 2,2-(2)H2-n-butyliodide With iodine; magnesium in diethyl ether 0.5 h; Inert atmosphereReflux; 2: carbon dioxide in diethyl ether Inert atmosphere; 3: With hydrogenchloride in diethyl ether T=20°C; Inert atmosphere;

Multistep reaction;