反应详情

To a solution of the product of Example 54 (11-6) (0.43 g, 1.39 mmol) in dimethylformamide (5 ml) was added 2-iodopropane (210 μl, 2.1 mmol), followed by cesium carbonate (0.68 g, 2.1 mmol). The reaction mixture was stirred overnight at room temperature. The reaction mixture was diluted with ethylacetate and washed with sodium bicarbonate (saturated). The organic layer was dried over sodium sulfate, filtered and concentrated to give an orangish oil. Flash column chromatography performed in 1/1 ethylacetate/hexane followed by ethylacetate yielded 229 mg (53%) product as a crystalline solid. NMR δ (ppm) CDCl3: 8.8 (d, 1H), 7.9 (dd, 1H), 7.3 (d, 1H), 5.5 (bs, 1H), 4.7 (bs, 2H), 4.4 (d, 1H), 1.4 (s, 9H), 1.3 (d, 6H).

1. washwashed with sodium bicarbonate (saturated)
2. dry with materialThe organic layer was dried over sodium sulfate
3. filtrationfiltered
4. concentrationconcentrated
5. customto give an orangish oil