反应详情

A mixture of methyl 3-bromo-5-(methylsulfonyl)benzoate (0.65 g, 2.2 mmol), lithium hydroxide (0.26 g, 11 mmol), tetrahydrofuran (25 mL) and water (5 mL) was stirred at room temperature for 3 h. Water (50 mL) was added and the mixture was acidified with 1N aq. HCl to pH 2-3 and extracted with EtOAc (100 mL). The organic layer was separated, washed with brine, dried (Na2SO4), and concentrated to yield a white solid. LC-MS: 278.6 [M−1]−; 1H NMR (400 MHz, CDCl3): 8.59 (m, 1H), 8.50 (m, 1H), 8.33 (m, 1H), 3.13 (s, 3H).

1. extractionextracted with EtOAc (100 mL)
2. customThe organic layer was separated
3. washwashed with brine
4. dry with materialdried (Na2SO4)
5. concentrationconcentrated
6. customto yield a white solid