1: 1H-pyrazole-4-carboxylic acid ethyl ester With sodium hydride in dimethyl sulfoxide 0.5 h; 2: 1-fluoro-4-(methylsulfonyl)benzene in dimethyl sulfoxide T=160°C; 18 h;

1: With lithium aluminium tetrahydride in tetrahydrofuran T=0°C; 1 h; 2: With Sodium potassium tartrate in tetrahydrofuran; water