反应详情

2.19 g of Trans-{4-[(Quinoline-4-carbonyl)-amino]-cyclohexyl}-acetic acid (7 mmol) was added in 1300 mL of dichloromethane. Then 1.8 mL of oxalyl chloride was added (21 mmol). The suspension was heated to reflux for 3 hours and then the cloudy mixture was concentrated under vacuum. The residue was taken up in 500 mL of dichloromethane as a suspension and (1.28 g, 21 mmol) sodium ethylthiolate freshly prepared from 1.45 mL of ethanothiol and 12.07 mL of butyl lithium (1.6 M in toluene) at 0° C. and by stirring in dimethoxyethane (20 mL) for 1 hour at room temperature. The reaction mixture was stirred overnight. NaHCO3 was added and the organic phase was extracted three times with dichloromethane. The organic phases were dried and concentrated and the residue was chromatographed with heptane/ethyl acetate 1:1 to yield the title compound as a solid (1.97 g, 78.9% yield). MS (m/e): 357.3 (M+H+).

1. temperatureThe suspension was heated
2. temperatureto reflux for 3 hours
3. concentrationthe cloudy mixture was concentrated under vacuum
4. extractionthe organic phase was extracted three times with dichloromethane
5. customThe organic phases were dried
6. concentrationconcentrated
7. customthe residue was chromatographed with heptane/ethyl acetate 1:1