1: 3-fluoropyridine With n-butyllithium; diisopropylamine in tetrahydrofuran T=-78°C; 1 h; 2: ethyl iodide in tetrahydrofuran T=20°C; 0.5 h;

lithium diisopropyl amide 1) THF, -70 deg C, 2) THF, -70 deg C to room temperature; Multistep reaction;