1: anhydrous propionitrile With n-butyllithium; isopropylamine in tetrahydrofuran; hexane T=-78°C; 1.58333 h; 2: 1-bromo-butane in tetrahydrofuran; hexane T=-78 - 20°C; 3: With hydrogenchloride in tetrahydrofuran; hexane; water

sulfuric acid

1: With lithium aluminium tetrahydride in diethyl ether T=0°C; 2 h; 2: With sodium hydroxide; water in diethyl ether