反应详情

温度

60 °C

Ethyl 2-(5-benzoyl-1,4-dimethylpyrrol-2-yl)-2-(4-nitrophenyl)acetate (8.2 g, 20.2 mmol) [prepared by proceeding as described in Example 1, Steps (a) and (b) ] was dissolved in a 1:1 mixture of methanol (200 ml). An aqueous solution of LiOH (250 mi 0.4 M, 100.9 mmol) was added and the mixture was stirred at 60° C. for 2 h. The organic solvents were evaporated in vacuo, the aqueous residue was acidified with 10% HCl, and the product was extracted into ethyl acetate. The organic phase was washed with water, dried over sodium sulfate, and concentrated under vacuum. Purification on a Florisil® column (hexane-ethyl acetate, 4:1) gave 4-[5-benzoyl-1,4dimethyl-1H-pyrrol-2-ylmethyl]-nitrobenzene (6.68 g, 99%) as a yellow solid. ##STR23##

1. customThe organic solvents were evaporated in vacuo
2. extractionthe product was extracted into ethyl acetate
3. washThe organic phase was washed with water
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated under vacuum
6. customPurification on a Florisil® column (hexane-ethyl acetate, 4:1)