反应详情

To a stirring solution of 15 in dioxane (0.4 M) at room temperature under nitrogen was added calcium carbonate (5.5 eq) and H2O (0.8 M). The reaction was refluxed overnight then vacuum filtered. The dioxane was removed under reduced pressure. The reaction mixture was diluted with H2O then extracted with dichloromethane (3×). The organic phases were combined, dried over sodium sulfate, filtered and concentrated in vacuo to afford the product. (77%) 1H NMR (400 MHz, CDCl3) δ 7.33 (d, 2H), 7.27 (d, 2H), 4.67 (s, 2H), 3.69 (s, 3H), 3.63 (s, 2H), 1.78 (br s, 1H).

1. temperatureThe reaction was refluxed overnight
2. filtrationvacuum filtered
3. customThe dioxane was removed under reduced pressure
4. additionThe reaction mixture was diluted with H2O
5. extractionthen extracted with dichloromethane (3×)
6. dry with materialdried over sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customto afford the product