反应详情

温度

90 °C

0.95 g of potassium carbonate and 7.8 ml of 4-amino-1,2,2,6,6-pentamethylpiperidine are successively added to a solution of 1.06 g of 2-methylpropan-2-yl 4-[4-(6-cyanopyridin-3-yl)-9H-carbazol-9-yl]-2-fluorobenzoate, obtained in stage 1 of Example 49, in 8 ml of dimethyl sulphoxide. The reaction mixture is heated at 90° C. for 2 hours and 15 minutes in a microwave, and then diluted with distilled water. The aqueous phase is extracted twice with ethyl acetate and the combined organic phases are washed with water and a saturated solution of sodium chloride and dried over magnesium sulphate. The residue is purified by silica gel chromatography, elution being carried out with a mixture of dichloromethane and methanol (97/3 by volume), so as to give 0.8 g of 2-methylpropan-2-yl 4-[4-(6-cyanopyridin-3-yl)-9H-carbazol-9-yl]-2-[(1,2,2,6,6-pentamethylpiperidin-4-yl)amino]benzoate in the form of a yellow oil, the characteristics of which are the following:

1. extractionThe aqueous phase is extracted twice with ethyl acetate
2. washthe combined organic phases are washed with water
3. dry with materiala saturated solution of sodium chloride and dried over magnesium sulphate
4. customThe residue is purified by silica gel chromatography, elution
5. additionbeing carried out with a mixture of dichloromethane and methanol (97/3 by volume)