反应详情

温度

40 °C

1-((Methylthio)methylsulfonyl)benzene (2.85 g, 14.1 mmole) was dissolved in dry dimethylforamide (DMF, 15 mL). Sodium hydride (1.69 g, 35.3 mmol) was added portion wise under nitrogen atmosphere at 0° C. The reaction mass was gradually heated to 40° C. and maintained for 30 min at 40° C. A solution of (1R)-1,2-bis(bromomethyl)-1-(1-naphthyl)cyclopropane (2.5 g, 7.0 mmol) in DMF (5 mL) was added dropwise for 30 min at 0° C. The temperature of the reaction mass was slowly brought to room temperature and maintained for 7 hours. The reaction was monitored by TLC (ethyl acetate/hexane (10:90)). The reaction mass was quenched with water. The aqueous layer was extracted with diethyl ether (2×150 mL). The combined organic layer was dried over anhydrous sodium sulfate, filtered and evaporated under reduced pressure to yield 10.0 g of crude oil that was purified by column chromatography (silica gel, ethyl acetate/hexane (4:96) to yield 1.92 g (69%) of product. 1H NMR δ(300 MHz,CDCl3): 1.93 (2H,m), 2.01 (1H,m), 2.07 (3H,s), 2.28 (2H,m), 2.44 (2H,m), 2.88 (1H,dd, J=15 Hz), 7.36 (1H,m), 7.47-7.68 (7H,m), 7.74 (1H,m), 7.91-7.97 (3H,m).

1. temperaturemaintained for 30 min at 40° C
2. customwas slowly brought to room temperature
3. temperaturemaintained for 7 hours
4. customThe reaction mass was quenched with water
5. extractionThe aqueous layer was extracted with diethyl ether (2×150 mL)
6. dry with materialThe combined organic layer was dried over anhydrous sodium sulfate
7. filtrationfiltered
8. customevaporated under reduced pressure
9. customto yield 10.0 g of crude oil that
10. customwas purified by column chromatography (silica gel, ethyl acetate/hexane (4:96)