diethylaluminium azide in toluene T=90°C; 7 h;

1: para-bromotoluene With magnesium in tetrahydrofuran T=50°C; 1 h; 2: 5-(2-fluorophenyl)-1H-tetrazole in tetrahydrofuran; ethylene glycol dimethyl ether T=80°C; Grignard reaction; 12 h;

in ethylene glycol dimethyl ether 16 h; Heating;