反应详情

1.54 g (5 Mole) of the title compound of Example 3 in 20 ml of thionyl chloride was refluxed for 3 hours and then concentrated to dryness in vacuo. 523 mg (1.6 mmole) of the resulting acid chloride was dissolved in 20 ml methylene chloride and to the solution was added 292 mg (1.6 mmole) 2,4,6-trimethoxyaniline and 195 mg (1.6 mmole) 4-dimethylaminopyridine. The resulting solution was stirred at room temperature overnight and then concentrated in vacuo. The residue was partitioned between 60 ml ethyl acetate and 20 ml 1N aqueous hydrochloric acid solution. The ethyl acetate layer was washed with 50 ml water and 50 ml saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate and concentrated in vacuo. The crude product was chromatographed on 100 g silica gel, eluting with 1:1 hexane/ethyl acetate to yield 370 mg (49% yield) of the title compound as a whitish solid.

1. concentrationconcentrated to dryness in vacuo
2. concentrationconcentrated in vacuo
3. customThe residue was partitioned between 60 ml ethyl acetate and 20 ml 1N aqueous hydrochloric acid solution
4. washThe ethyl acetate layer was washed with 50 ml water and 50 ml saturated aqueous sodium chloride solution
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated in vacuo
7. customThe crude product was chromatographed on 100 g silica gel
8. washeluting with 1:1 hexane/ethyl acetate