反应详情

温度

0 °C

A solution of thieno[3,2-b]thiophene (see Fuller, L.; Iddon, B.; Smith, K. A. J. Chem. Soc. Perkin Trans 1 1997, 3465-3470) (1.27 g) in tetrahydrofuran (30 ml) was cooled to −78° C. under argon atmosphere, and thereto was added dropwise n-butyl lithium (1.59 M hexane solution, 5.70 ml). The mixture was stirred at 0° C. for 30 minutes, and cooled again to −78° C. Added thereto was a solution of hexachloroethane (2.14 g) in tetrahydrofuran (5 ml). The mixture was stirred at the same temperature for one hour, and warmed to 0° C. Added thereto was a saturated aqueous ammonium chloride solution, and the mixture was extracted with ethyl acetate. The solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane) to give 2-Chlorothieno[3,2-b]thiophene (1.19 g) as a solid.

1. temperaturecooled again to −78° C
2. additionAdded
3. stirringThe mixture was stirred at the same temperature for one hour
4. temperaturewarmed to 0° C
5. additionAdded
6. extractionthe mixture was extracted with ethyl acetate
7. customThe solvent was evaporated under reduced pressure
8. customThe residue was purified by silica gel column chromatography (hexane)