反应详情

Ethyl 1-{4-cyano-7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-5-methyl-6-phenyl-1,3-benzoxazol-2-yl}piperidine-4-carboxylate (I-162) (0.26 g, 0.52 mmol) was dissolved in tetrahydrofuran (10 ml), then 1 N sodium hydroxide (0.60 ml, 0.60 mmol) was added. After stirring at room temperature for 19 hours, 1 N sodium hydroxide (0.40 ml, 0.40 mmol) was further added, followed by stirring at room temperature for 24 hours. 1 N Hydrochloric acid (1.00 ml, 1.00 mmol) was added, then the solvent was evaporated away under reduced pressure. The resulting residue was purified by silica gel column chromatography (chloroform:methanol:water=8:3:0.5), then ethanol and a small amount of ether were added, and the insoluble matter was collected by filtration to obtain a colorless solid (0.18 g, 71%).

1. stirringby stirring at room temperature for 24 hours
2. customthe solvent was evaporated away under reduced pressure
3. customThe resulting residue was purified by silica gel column chromatography (chloroform:methanol:water=8:3:0.5)
4. additionethanol and a small amount of ether were added
5. filtrationthe insoluble matter was collected by filtration