反应详情

To a solution of 4-bromophenol (0.50 g, 2.89 mmol) and dimethoxymethane (2.6 mL, 29.39 mmol) in DCM (60 mL) was added P2O5 (1.50 g, 10.57 mmol). The reaction mixture was stirred at for 1 h and insoluble precipitate was filtered off. Solid Na2CO3 was added to the solution and stirred for additional 10 min. The solid was filtered off and the solution was concentrated. Purification on a silica gel column gave the desired product as a clear oil (363 mg). NMR (CDCl3): 7.38 (d, 2H), 6.93 (d, 2H), 5.15 (s, 2H), 3.47 (s, 3H).

1. filtrationwas filtered off
2. additionSolid Na2CO3 was added to the solution
3. stirringstirred for additional 10 min
4. filtrationThe solid was filtered off
5. concentrationthe solution was concentrated
6. customPurification on a silica gel column