potassium carbonate in N,N-dimethyl-formamide T=20°C;

potassium carbonate in acetone

1: benzyl alcohol With sodium hydride in tetrahydrofuran T=0°C; 0.25 h; 2: 2,4-difluoro-1-bromobenzene in tetrahydrofuran T=20°C; 17 h; Further stages. Title compound not separated from byproducts.;

magnesium in tetrahydrofuran T=65°C; 2 h;

1: methanol With potassium tert-butylate in N,N-dimethyl-formamide T=0°C; 0.166667 h; prs; 2: 2-benzyloxy-1-bromo-4-fluorobenzene in N,N-dimethyl-formamide T=80°C; 20 h; Further stages.;