反应详情

To a mixture of sodium hydride 60% in oil (11.5 mg, 0.28 mmol) in NMP (0.5 ml) was added at 0° C. a solution of 6-hydroxy-2-pyrrolo[1,2-c]pyrimidin-3-yl-chromen-4-one O-tert-butyl-oxime (example 81A) (100 mg, 0.28 mmol) in NMP (0.5 ml). After 1 hour at room temperature, a solution of 4-(2-Chloro-ethoxy)-pyridine (103 mg, 042 mmol), tetrabutyl ammonium iodide (53 mg, 0.14 mmol), 15-crown-5 (63 mg, 0.28 mmol) in NMP (0.5 ml) was added at 0° C. After stirring at room temperature for 24 hours, the reaction mixture was diluted with a saturated solution of ammonium chloride and extracted with ethyl acetate. The organic layers were washed with a saturated solution of ammonium chloride, water, brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography over silica gel (gradient cyclohexane/ethyl acetate: 0-70%) to yield the title compound (54 mg, 42%) as a yellow solid.

1. extractionextracted with ethyl acetate
2. washThe organic layers were washed with a saturated solution of ammonium chloride, water, brine
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated
6. customThe residue was purified by flash chromatography over silica gel (gradient cyclohexane/ethyl acetate: 0-70%)