2-Benzyl-1-tosyl-1H-benzimidazole 6c

Yield 93.25%, mp = N.D. (Oily), colour = brown. ¹H NMR (400 MHz, DMSO-d₆) δ_H: 2.76 (s, 3H, CH₃—Ar), 3.56 (s, 2H, CH₂—Ar), 6.35–6.38 (dd, J₁ = 3.60 Hz, J₂ = 9.26 Hz, 1H, Ph—H), 6.48–6.49 (dd, J₁ = 3.60 Hz, J₂ = 8.00 Hz, 1H, Ph—H), 6.92–6.94 (d, J = 8.76 Hz, 2H, Ph—H), 7.12 (s, 5H, Ph—H), 7.22–7.24 (d, J = 9.26 Hz, 1H, Ph—H), 7.30–7.32 (d, J = 8.00 Hz, 1H, Ph—H), 7.44–7.46 (d, J = 8.76 Hz, 2H, Ph—H). ¹³C NMR (100 MHz, DMSO-d₆) δ_C: 21.5(CH₃), 34.9 (CH₂), 115.2 (2 × CH), 123.4 (2 × CH), 125.8, 128.1, (2 × CH), 128.7 (2 × CH), 129.5 (2 × CH), 130.1 (2 × CH), 134.7, 136.7, 138.9 (2 × C), 139.6, 142.6 ppm. λ_max in nm (log ε_max): 233 (5.3679), 299 (4.7896). FT-IR (ν_max in cm⁻¹): 2924, 2854 (CH aliphatic), 1648 (CC aromatic), 1562 (CN imine), 1376 (SO₂), 1185 (SO₂ 2nd band). Anal. Calcd for C₂₁H₁₈N₂O₂S (362.44): C, 69.59; H, 5.01; N, 7.73%. Found: C, 69.51; H, 4.88; N, 7.82%.