Dimethylformamide → Methyl 3-fluoro-4-nitrobenzoate

Participants

Reaction Conditions

Reaction Steps

To a 500 ml flask under nitrogen atmosphere was charged 3-fluoro-4-nitro benzoic acid (10 g, 0.054 mol, 1 eq) and 250 ml of Toluene followed by DMF (210 ul, 3.7 mmol, 0.05 eq) and was heated to 70° C. At 40° C. thionyl chloride (8.0 ml, 0.11 mol, 2.0 eq) was added and the reaction was allowed to stir at 70° C. for 16 hours. The reaction was removed from the heat and placed in an ambient temperature bath. 100 ml of anhydrous methanol was added and then concentrated on rotary evaporator under reduced pressure, and bath temp of 45° C. The final volume was reduced to ˜70 ml and slowly add hexane 100 ml with stiring to yield a light yellow solid, yield 97%. 1H NMR (Solvent CDCl3), Singlet, 3 H, 3.99 ppm, Doublet of Doublets, 2H, 7.95 ppm, Triplet, 1H, 8.15 ppm. Thin Layer Chromatography elution 5% methanol/dichloromethane, Rf=0.9.

Provenance & Evidence