1: 4-iodobenzoic acid ethyl ester With isopropylmagnesium chloride lithium chloride complex in tetrahydrofuran T=-15°C; 1 h; 2: pivalaldehyde in tetrahydrofuran T=0 - 20°C; 2 h; 3: With 1,3-Diiodo-5,5-dimethyl-2,4-imidazolidinedione; potassium carbonate in tetrahydrofuran; tert-butyl alcohol 20 h; RefluxDarkness;

1: 4-bromo-benzoic acid ethyl ester With diisobutylaluminium hydride; magnesium; lithium chloride; zinc(II) chloride in tetrahydrofuran T=25°C; 3 h; 2: pivaloyl chloride With copper (I) cyanide; lithium chloride in tetrahydrofuran T=25°C; 0.5 h;

1: 4-iodobenzoic acid ethyl ester With lithium dineopentylcuprate in tetrahydrofuran T=-30°C; 2 h; 2: pivaloyl chloride in tetrahydrofuran T=20°C;

1: 4-ethoxycarbonylphenylzinc iodide With bis-triphenylphosphine-palladium(II) chloride in tetrahydrofuran T=0°C; 0.25 h; 2: pivaloyl chloride in tetrahydrofuran T=0°C; 1.5 h;

bis-triphenylphosphine-palladium(II) chloride in tetrahydrofuran T=0°C;

sulfuric acid in ethanol; dichloromethane