反应详情

Thionyl chloride (0.80 ml) was added slowly to a solution of 3-(5-methyl-2-phenyl-4-oxazolylmethoxy)-5-isoxazolylmethanol (2.86 g) in toluene (50 ml) at room temperature, which was stirred for 30 minutes under reflux. After cooling, the reaction mixture was poured into saturated aqueous sodium bicarbonate solution, which was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated aqueous sodium chloride solution, dried (MgSO4), and concentrated to obtain 5-chloromethyl-3-(5-methyl-2-phenyl-4-oxazolylmethoxy)isoxazole (2.70 g, yield 89%) as colorless crystals. This was recrystallized from ethyl acetate-hexane. Melting point: 105–106° C.

1. temperatureunder reflux
2. temperatureAfter cooling
3. extractionwas extracted with ethyl acetate
4. washThe ethyl acetate layer was washed with saturated aqueous sodium chloride solution
5. dry with materialdried (MgSO4)
6. concentrationconcentrated