反应详情

A stirred solution of 2-(dimethoxymethyl)-4H-1-benzopyran-4-one (1.1 g, 0.005 m) in 5 N hydrochloric acid (20 ml) was heated at 100° for 3 hours. The reaction mixture was cooled and extracted with CHCl3. The extracts were dried over MgSO4 and evaporated under reduced pressure to give a crystalline product. Recrystallization from ethyl acetate gave off-white crystals (710 mg, 81%), m.p. 159°-161°.

1. temperatureThe reaction mixture was cooled
2. extractionextracted with CHCl3
3. dry with materialThe extracts were dried over MgSO4
4. customevaporated under reduced pressure
5. customto give a crystalline product
6. customRecrystallization from ethyl acetate