反应详情

To a solution of 1-(3,5-difluorophenyl)cyclopentanecarboxylic acid methyl ester (Step A, 2.0 g, 8.3 mmol) in dimethylsulfoxide (5 mL) was added potassium hydroxide (1.9 g, 33 mol) in 2 mL of water. After stirring at room temperature for 2.5 h, the reaction mixture was partitioned between ether (50 mL) and saturated aqueous hydrochloric acid (2 N, 50 mL). The organic layer was separated and the aqueous layer extracted with ether (2×50 mL). The combined extracts were dried over anhydrous sodium sulfate, filtered, and concentrated to dryness to give the title compound. 1H NMR (400 MHz, CD3OD): δ 6.97 (m, 2H), 6.80 (m. 1H), 2.60 (m, 2H), 1.84 (m, 2H), 1.74 (m, 4H).

1. customthe reaction mixture was partitioned between ether (50 mL) and saturated aqueous hydrochloric acid (2 N, 50 mL)
2. customThe organic layer was separated
3. extractionthe aqueous layer extracted with ether (2×50 mL)
4. dry with materialThe combined extracts were dried over anhydrous sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated to dryness