反应详情

To a solution of 0.5 g (1.20 mmol) 6-bromo-5-(1-isopropyl-piperidin-4-yloxy)-1H-indole-2-carboxylic acid hydrochloride in 8 mL N,N-dimethylformamide, 0.48 g (1.50 mmol) O-(benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium tetrafluoroborate, 0.31 g (1.33 mmol) 1-(piperidin-1-yl-sulfonyl)-piperazine and 1.0 mL (0.77 g, 6.0 mmol) N,N-diisopropylethylamine were added. After 2 h the solution was poured on 10% aqueous sodium bicarbonate solution, the phases were separated and the aqueous phase was extracted three times with ethyl acetate. The combined organic layers were washed three times with water followed by brine, dried over magnesium sulfate, filtered and evaporated. The residue was purified by flash chromatography twice on silica gel using a gradient of dichloromethane: methanol (100:0 to 50:50 v/v) as eluant, to afford 0.4 g (56%) of the title compound as a light-yellow foam.

1. customthe phases were separated
2. extractionthe aqueous phase was extracted three times with ethyl acetate
3. washThe combined organic layers were washed three times with water
4. dry with materialdried over magnesium sulfate
5. filtrationfiltered
6. customevaporated
7. customThe residue was purified by flash chromatography twice on silica gel using a gradient of dichloromethane: methanol (100:0 to 50:50 v/v) as eluant