反应详情

Compound 222f (1.23 g, 2.82 mmol), cesium trichloride (1.58 g, 4.23 mmol), and sodium iodide (423 mg, 2.82 mmol) in ACN (26 mL) were stirred at 85° C. for 1 hr. The mixture was then filtered through celite and the solvent was evaporated. The brown solid obtained was suspended in water, pH was adjusted at 5 with 1N HCl. The mixture was extracted with DCM, dried over Na2SO4, filtered, concentrated under reduced pressure, and purified by chromatography on silica gel (petroleum ether/DCM) to yield compound 218f as a brown solid in 55% yield. 1H NMR (CDCl3, 400 MHz) δ (ppm) 1.40 (d, J=6.91 Hz, 6H), 2.80 (s, 3H), 3.17-3.24 (m, 1H), 3.89 (s, 3H), 7.00 (s, 1H), 7.21 (m, 1H), 7.55 (s, 1H), 7.79 (s, 1H), 9.56 (brs, 1H).

1. filtrationThe mixture was then filtered through celite
2. customthe solvent was evaporated
3. customThe brown solid obtained
4. extractionThe mixture was extracted with DCM
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. custompurified by chromatography on silica gel (petroleum ether/DCM)