反应详情

A mixture of bis-(5-chloropyrid-2-yl)ketone (0.8 g), trimethylsulphoxonium iodide (0.84 g), cetrimide (0.08 g) and sodium hydroxide (3 g) in water (16 ml) and 1,1,1-trichloroethane (30 ml) was stirred vigorously and heated at 70° to 75° C. for 2.5 hours. Further trimethylsulphoxonium iodide (0.86 g) was added and the mixture heated at 75° to 80° C. for a further 2 hours. The mixture was cooled, diluted with water (10 ml) and extracted with dichloromethane (3×20 ml). The combined organic extracts were dried over magnesium sulfate and evaporated to yield the crude title compound as a brownish paste (0.8 g), which was used directly.

1. temperatureheated at 70° to 75° C. for 2.5 hours
2. temperaturethe mixture heated at 75° to 80° C. for a further 2 hours
3. temperatureThe mixture was cooled
4. extractionextracted with dichloromethane (3×20 ml)
5. dry with materialThe combined organic extracts were dried over magnesium sulfate
6. customevaporated