HCID 20084379, compound → 8-Fluoro-isochroman-1,3-dione

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Reaction Steps

2-Carboxymethyl-6-fluoro-benzoic acid (130 mg, 0.65 mmol) in acetyl chloride (2 ml) was heated under microwave irradiation at 150° C. for 10 min then concentrated in vacuo to give the title product (120 mg, 100% yield). The compound is hydroscopic and slowly decomposes back to the starting diacid in wet solvents or under moisturised atmosphere. 1H NMR (500 MHz, DMSO-d6): 4.29 (s, 2H), 7.27 (d, J=7.8 Hz, 1H), 7.34 (dd, J=8.5 Hz, J=11 Hz, 1H), 7.76 (dt, J=5.3 Hz, J=8 Hz, 1H).

Provenance & Evidence