(i) NaNH2, benzene, (ii) /BRN= 505984/; Multistep reaction;

n-butyllithium in tetrahydrofuran; pentane T=-50°C;

1: (phenylthio)methyltriphenylphosphonium chloride With potassium hexamethylsilazane in tetrahydrofuran; toluene T=0°C; 0.5 h; Inert atmosphere; 2: 4-cyanobutyraldehyde in tetrahydrofuran T=20°C; Wittig reaction; 2 h; Inert atmosphere;

(i) NaNH2, benzene, (ii) /BRN= 506010/; Multistep reaction;

sodium hydride in dimethyl sulfoxide 1.) a.) 75 deg C, 1 h; b.) 27 deg C, 1 h; 2.) RT; Yield given. Yields of byproduct given. Title compound not separated from byproducts;