1: 1-tetracosyl bromide With magnesium in diethyl ether 3 h; 2: sodium salt of 12-bromododecanoic acid With dilithium tetrachlorocuprate in tetrahydrofuran; diethyl ether T=-10°C; 4 h; Further stages.;

sodium hydroxide; hydrazine hydrate in ethylene glycol

1: 31.9 mg / LiAlH4 / diethyl ether / 1 h / Heating 2: 30.6 mg / carbon tetrabromide; triphenylphosphine / acetonitrile / 2 h / Heating View Scheme