p-Fluoronitrobenzene → HCID 58528840, compound

Participants

Reaction Steps

To a solution of 3-hydroxy-5-isopropoxy-benzoic acid methyl ester (7.00 g, 33.3 mmol) in acetone (80 mL) was added K2CO3 (5.06 g, 36.6 mmol) and 1-fluoro-4-nitrobenzene (3.53 mL, 33.3 mmol) at rt. The resulting mixture was refluxed for 12 hr. Then the mixture was filtered through a pad of Celite to remove insoluble salts and the cake was rinsed with acetone. Combined filtrates were concentrated under vacuum to afford a residue which was purified by silica gel flash chromatography (7.5×30 cm, hexane/EtOAc, v/v 10:1, 5:1). Fractions containing the mono-alkylation product were pooled and concentrated to give 3-isopropoxy-5-(4-nitro-phenoxy)-benzoic acid methyl ester (11.0 g, 44%) as a brown oil. 1H NMR (300 MHz, CDCl3): δ 8.22 (d, J=9 Hz, 2H), 7.43 (dd, J=1, 2 Hz, 1H), 7.29 (dd, J=1, 2 Hz, 1H), 7.04 (d, J=9 Hz, 2H), 6.80 (dd, J=2, 2 Hz, 1H), 4.56-4.64 (m, 1H). 3.90 (s, 3H), 1.35 (d, J=6 Hz, 6H).

Provenance & Evidence