1: 1-bromo-3,5-difluoro-benzene With iodine; magnesium in tetrahydrofuran Reflux; 2: benzaldehyde in tetrahydrofuran T=0 - 20°C; Grignard reaction;

palladium diacetate; caesium carbonate; triphenylphosphine in o-xylene T=150°C; 16 h; Inert atmosphere;

Yield given. Multistep reaction;