Sodium hydride → Methyl 4-{[(3,5-dichlorophenyl)(1-methyl-1H-benzimidazol-2-yl)amino]-methyl}benzoate

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Reaction Steps

To the title compound from Example 223 Step A (0.21 mmol, 60 mg) and NaH (0.24 mmol, 6 mg of a 60% slurry in mineral oil) was added 0.5 mL of DMF (gas evolution). After 15 min, methyl-4-(bromomethyl)benzoate (0.24 mmol, 55 mg) was added and the reaction mixture was allowed to stand at ambient temperature overnight. The mixture was partitioned between DCM and NaHCO3. The organic phase was collected and the aqueous phase was extracted 2× with DCM. After 30 min the reaction mixture was concentrated under reduced pressure, and the residue was purified by flash chromatography on silica eluting with 2% MeOH/DCM. The product was further purified by reverse phase HPLC (Condition B). The combined HPLC fractions were neutralized with saturated NaHCO3 and extracted with DCM. The organic phase was dried over MgSO4 and concentrated under reduced pressure to afford the product as a white solid. 1H NMR (500 MHz, d6-DMSO) δ 7.94 (d, 2H), 7.68 (d, 2H), 7.61 (d, 1H), 7.52 (d, 1H), 7.21-7.29 (overlapping m, 2H), 7.10 (t, 1H), 6.79 (d, 2H), 5.27 (s, 2H), 3.83 (s, 3H), 3.50 (s, 3H). MS (ESI): m/z 440 (M+H). HPLC A: 2.16 min.

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