1: methyllithium With cerium(III) chloride in tetrahydrofuran; diethyl ether 0.833333 h; Cooling with acetone-dry ice; 2: 2-pyridine carbonitrile in tetrahydrofuran; diethyl ether T=20°C; 5 h; Cooling with acetone-dry ice; 3: With ammonia; water in tetrahydrofuran; diethyl ether T=0°C;