反应详情

To a solution of 11.78 g (25.36 mmol) of 5-[N-tert-butoxycarbonyl-N-(4-pentafluoropropionamidobutan-1-yl)aminomethyl]imidazo[1,2-a]pyridine and 13.94 g (114.36 mmol) of 4-(N,N-dimethylamino)pyridine in 250 ml of chloroform was added 8.50 ml (76.09 mmol) of trichloroacetyl chloride. The mixture was heated for 16 hours under reflux. The reaction mixture was poured into ice-water, and extracted with 100 ml of chloroform. The organic layer was washed with 200 ml of a saturated aqueous saline solution, dried over magnesium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (eluent: chloroform) to afford 6.80 g of the desired compound (44.0%, a pale yellow liquid).

1. temperatureThe mixture was heated for 16 hours
2. temperatureunder reflux
3. extractionextracted with 100 ml of chloroform
4. washThe organic layer was washed with 200 ml of a saturated aqueous saline solution
5. dry with materialdried over magnesium sulfate
6. distillationthe solvent was distilled off under reduced pressure
7. customThe residue was purified by silica gel column chromatography (eluent: chloroform)