反应详情

To a solution of 2 g (13.1 mmol) of 2-amino-3-hydroxybenzoic acid in 60 mL of CH3OH at 0° C. was bubbled HCl gas until the solution was saturated. The reaction was heated at reflux for 12 h. The reaction mixture was concentrated and dissolved in 30 mL of water. The solution was neutralized with sat'd NaHCO3 solution and extracted with EtOAc. The organic fractions were dried over MgSO4, filtered and the filtrate was concentrated to give 1.8 g of the title compound as a brown solid.

1. temperatureThe reaction was heated
2. temperatureat reflux for 12 h
3. concentrationThe reaction mixture was concentrated
4. dissolutiondissolved in 30 mL of water
5. extractionextracted with EtOAc
6. dry with materialThe organic fractions were dried over MgSO4
7. filtrationfiltered
8. concentrationthe filtrate was concentrated