1: 1-bromo-3,5-difluoro-benzene With s-BuMgCl*LiCl; diisobutylaluminium hydride in tetrahydrofuran; hexane Reflux; 2: With zinc(II) chloride in tetrahydrofuran; hexane T=20°C; 3 h; 3: acetyl chloride With tetrakis(triphenylphosphine) palladium(0) in tetrahydrofuran; diethyl ether; hexane T=20°C; 12 h;

1: 1-bromo-3,5-difluoro-benzene With magnesium 2: acetic anhydride With AlCl3, aluminium chloride; copper(l) chloride

tetrabutylammonium tribromide in methanol; diethyl ether; dichloromethane

N-bromosuccinmide; sulfuric acid; acetic acid T=5 - 10°C;

Bu4NBr3 in dichloromethane T=20°C; 72 h;

1: With sodium tetrahydroborate in methanol T=20°C; 3 h; 2: With water; ammonium chloride in methanol