1: N,N-dibenzyl-4-bromobenzenamine With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 1 h; 2: diphenyldisulfane in tetrahydrofuran; hexane 2 h;

1.1: NaH / tetrahydrofuran / 0.5 h / 0 °C 1.2: tetrahydrofuran / 3 h / 20 °C 2.1: n-BuLi / tetrahydrofuran; hexane / 1 h / -78 °C 2.2: 66 percent / tetrahydrofuran; hexane / 2 h View Scheme

1.1: NaH / tetrahydrofuran / 0.5 h / 0 °C 1.2: tetrahydrofuran / 3 h / 20 °C 2.1: n-BuLi / tetrahydrofuran; hexane / 1 h / -78 °C 2.2: 66 percent / tetrahydrofuran; hexane / 2 h View Scheme