n-butyllithium 1.) Et2O, hexane, -70 deg C, 1 h, 2.) 25 deg C, a few hours; Yield given. Multistep reaction;

n-butyllithium 1.) Et2O, hexane, -70 deg C, 1 h, 2.) 25 deg C, a few hours; Yield given. Multistep reaction;

1: 1-(1-pyrrolidinomethyl)benzimidazole With n-butyllithium in tetrahydrofuran; hexane T=-80°C; 0.25 h; 2: benzaldehyde in tetrahydrofuran; hexane T=-80 - -20°C; 3 h; 3: With ammonium chloride in tetrahydrofuran; hexane