1: [2-(4-Bromophenoxy)ethoxy](1,1-dimethylethyl)dimethylsilane With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.75 h; 2: N,N-dimethyl-formamide in tetrahydrofuran; hexane T=-78 - 20°C; 3 h; 3: With water in tetrahydrofuran; hexane

in N,N-dimethyl-formamide T=100°C; 0.5 h;