1: With N,N,N',N,-tetramethylethylenediamine; sec.-butyllithium in diethyl ether; hexane T=-78°C; 1 h; 2: With boric acid trimethyl ester in diethyl ether; hexane T=-78 - 20°C; 3: With ammonium chloride in diethyl ether; hexane T=20°C; pH=6; Further stages.;

1: p-MOMOC6H4Cl With n-butyllithium in tetrahydrofuran; hexane T=0°C; 2 h; 2: boric acid trimethyl ester in tetrahydrofuran; hexane 1 h; 3: With water; ammonium chloride in tetrahydrofuran; hexane 1 h;