1: 2-methoxybromobenzene With n-butyllithium in tetrahydrofuran; hexane T=-50°C; 0.75 h; 2: DPPECl4 in tetrahydrofuran; diethyl ether; hexane T=-50 - 20°C; Further stages.;

aluminium hydride in tetrahydrofuran Heating;

1: 1.) n-C4H9Li / 1.) pentane, overnight; 2.) Et2O, -20 deg C -> 25 deg C; reflux, 2 h 2: 1.) n-C4H9Li / 1.) THF, room temp., 1 h; 2.) reflux, overnight 3: 85 percent / AlH3 / tetrahydrofuran / Heating View Scheme

1: 1.) n-C4H9Li / 1.) THF, room temp., 1 h; 2.) reflux, overnight 2: 85 percent / AlH3 / tetrahydrofuran / Heating View Scheme