反应详情

A mixture of 6-methoxysalicylic acid (10.0 g, 59.5 mmol) in methanol (40 mL) and sulfuric acid (2 mL) is heated at reflux 48 h. Although some acid remains the reaction is concentrated to remove the methanol and partitioned between ethyl acetate and saturated sodium carbonate solution. The organic phase is separated and washed with sodium carbonate until no acid remains by TLC analysis. The organic phase is dried and concentrated to provide the title compound as a low melting solid.

1. temperatureis heated
2. temperatureat reflux 48 h
3. concentrationis concentrated
4. customto remove the methanol
5. custompartitioned between ethyl acetate and saturated sodium carbonate solution
6. customThe organic phase is separated
7. washwashed with sodium carbonate until no acid
8. customThe organic phase is dried
9. concentrationconcentrated