反应详情

To methyl 3-fluoro-4-(3-methoxyprop-1-ynyl)benzoate (1.40 g, 6.30 mmol) in 15 ml of 2:1 THF:MeOH at room temperature was added NaOH (1.89 mL of 4 M, 7.56 mmol). The mixture was stirred at room temperature for 1 h before the volatile solvents were removed. The remainder was extracted with ether. The aqueous layer was acidified with 1M HCl and was extracted with ether (3×). The combined ether extracts were dried and concentrated to give 3-fluoro-4-(3-methoxyprop-1-ynyl)benzoic acid as a white solid. ESI-MS m/z calc. 208.2, found 209.2 (M+1)+; Retention time: 1.22 minutes (3 min run). 1H NMR (400 MHz, CDCl3) δ 7.85 (dd, J=8.0, 1.4 Hz, 1H), 7.80 (dd, J=9.5, 1.3 Hz, 1H), 7.59-7.49 (m, 1H), 4.39 (s, 2H), 3.48 (s, 3H).

1. customwere removed
2. extractionThe remainder was extracted with ether
3. extractionwas extracted with ether (3×)
4. dry with materialThe combined ether extracts were dried
5. concentrationconcentrated