反应 #944014

反应方程式

sodium carbonate

phosphorous oxychloride

1-(4-fluorophenyl)-2-(4-methylsulfonylphenyl)pyrrole

→

title compound

收率 50.0%

1-(4-Fluorophenyl)-5-formyl-2-(4-methylsulfonylphenyl)pyrrole

收率 50.0%

溶剂

dimethylformamide

反应条件

后处理

1. 1
   萃取The mixture was then extracted with ethyl acetate
2. 2
   萃取The organic extract
3. 3
   洗涤was washed with water
4. 4
   干燥dried over anhydrous sodium sulfate
5. 5
   其他after which the solvent was removed by distillation under reduced pressure
6. 6
   洗涤eluted with a 5:1 by volume mixture of hexane and ethyl acetate

实验过程

1.67 g (5.3 mmol) of 1-(4-fluorophenyl)-2-(4-methylsulfonylphenyl)pyrrole (prepared as described in Example 33) were dissolved in 30 ml of dimethylformamide, 0.50 ml (5.3 mmol) of phosphorous oxychloride was added to the resulting solution, and the mixture was then stirred at 60° C. for 2 hours. At the end of this time, the reaction mixture was gradually added to ice-water and the pH of the mixture was adjusted to a value of 8-9 by the addition of sodium carbonate. The mixture was then extracted with ethyl acetate. The organic extract was washed with water and dried over anhydrous sodium sulfate, after which the solvent was removed by distillation under reduced pressure. The residue was applied to a silica gel chromatography column and eluted with a 5:1 by volume mixture of hexane and ethyl acetate, to give 0.90 g (yield 50%) of the title compound as a white powder, melting at 135-137° C.

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