Potassium Carbonate → {4-[4-(5-Chloro-pyridin-2-ylcarbamoyl)-2-nitro-phenoxy]-phenyl}-carbamic acid tert-butyl ester

Participants

Reaction Conditions

Reaction Steps

A solution of the product of Example 199A (300 mg, 0.9612 mmol) in anhydrous N,N-dimethylformamide (5 mL) was treated with N-Boc-4-hydroxyaniline (201 mg, 0.9612 mmol) and potassium carbonate (266 mg, 1.922 mmol) at room temperature, then heated at 80° C. under a nitrogen atmosphere for 5 hours. The reaction was cooled to room temperature and the solvent removed by rotary evaporation in vacuo. The residue was taken up in ethyl acetate (100 mL) and washed with water (4×50 mL) and brine (50 mL). The organic layer was dried over anhydrous sodium sulfate, filtered, and concentrated by rotary evaporation in vacuo. Trituration with 5% ethyl acetate gave the title compound (284 mg, 61%).

Provenance & Evidence