1: p-tert-butylphenyl methyl ether With n-butyllithium; N,N,N',N,-tetramethylethylenediamine in diethyl ether Heating; 2: N,N-dimethylcarbamoyl chloride T=20°C; 1 h; Further stages.;

1.1: NaH / tetrahydrofuran 1.2: 92 percent / tetrahydrofuran / Heating 2.1: n-butyllithium; N,N,N',N'-tetramethylethylenediamine / diethyl ether / Heating 2.2: 60 percent / 1 h / 20 °C View Scheme

titanium(III) chloride; zinc copper in ethylene glycol dimethyl ether T=20°C; McMurry olefination;