反应详情

To the solution of THF and water (4:1, 1 mL) of 8-(2,2-dimethyl-[1,3]dioxolan-4-ylmethoxy)-6,6-dimethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile (Compound A14-1, 30 mg, 0.07 mmol), camphor sulfonic acid (36 mg, 0.14 mmol) was added at room temperature. After stirring at room temperature for 38 hr, the mixture was extracted with ethyl acetate. The organic layer was dried over sodium sulfate. The drying agent was removed by filtration and the residues obtained after concentration under reduced pressure were purified by silica gel column chromatography (dichloromethane/methanol) to obtain the title compound (white solid, 28 mg, 72%).

1. extractionthe mixture was extracted with ethyl acetate
2. dry with materialThe organic layer was dried over sodium sulfate
3. customThe drying agent was removed by filtration
4. customthe residues obtained
5. concentrationafter concentration under reduced pressure
6. customwere purified by silica gel column chromatography (dichloromethane/methanol)