Dimethylformamide → N-t-butyl-4-(2-butyl-4-chloro-5-formylimidazol-1-ylmethyl)benzenesulfonamide

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Reaction Steps

Intermediate (2a) (13.6 g, 45 mmol, 1.0 eq), 2-butyl-5-chloro-3H-imidazole-4-carbaldehyde (8.4 g, 45 mmol, 1.0 eq) and potassium carbonate (12.4 g, 90 mmol, 2.0 eq) were added to 90 mL of DMF. The mixture was stirred at room temperature for 16 hours. The mixture was then diluted with 300 mL EtOAc and extracted with 100 mL 10% aq. LiCl, 2×200 mL water, 100 mL saturated aqueous NaCl, dried over MgSO4, and filtered. The filtrate was evaporated and purified by flash chromatography (40% EtOAc:hexanes) to yield intermediate (2b) (13.0 g). MS m/z: [M+H+] calcd for C19H26ClN3O3S, 412.1. found 412.4.

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