Thionyl Chloride → 3-methoxy-4-nitro-benzoyl Chloride

Participants

Reaction Steps

Thionyl chloride 3.7 mL, (50 mmol) was added drop wise, at room temperature, to a stirred solution of 3-methoxy4-nitro-benzoic acid ( 1.0 g, 5.07 mmol) in 15 mL of dioxane under a nitrogen atmosphere. After the addition was complete, the reaction was allowed to stir at room temperature for 1 hr. The reaction flask was then fitted with a distillation head, and excess thionyl chloride and about ½ of the solvent was removed by distillation in a 120° C. oil bath. The remaining solvent was removed by rotary evaporation, and the residue was taken up in 20 mL toluene and again about ½ of the solvent was removed by distillation. The remaining solution was then cooled to 0° C., and the white solid which precipitated, was collected by suction filtration, and rinsed with 1-1 Et2O-hexane. 1H-NMR (400 MHz, CDCl3) δ 7.87 (d, J=7.83 Hz, 1H), 7.82 (d, J=7.83 Hz, 1H), 7.77 (s, 1H), 4.04 (s, 3H).

Provenance & Evidence