1: para-bromotoluene With magnesium in diethyl ether 2: α-[(trimethylsilyl)oxy]-α-(p-methoxyphenyl)acetonitrile in diethyl ether Grignard reaction; 3 h; Reflux; 3: With hydrogenchloride; water in tetrahydrofuran; diethyl ether T=20°C; Grignard reaction; 48 h;

thionyl chloride; N,N-dimethyl-formamide in diethyl ether 0.5 h; Ambient temperature;