反应详情

温度

55 °C

Sulfuric acid (6 ml, 113 mmol) was added to drop wise to a solution of the 2-methyl-4-nitrobenzoic acid (5 g, 27.6 mmol) in MeOH (138 ml) at RT. After the addition was complete the mixture was heated to 55° C. overnight. The volatiles were removed in vacuum and the residue partitioned between EtOAc (100 ml) and water (100 ml). The layers were separated and aqueous phase extracted with EtOAc (2×100 ml). The organic fractions were combined, washed with saturated sodium bicarbonate (aqueous, 100 ml), brine, dried over Na2SO4, filtered and the volatiles removed in vacuum to give the titled compound.

1. additionAfter the addition
2. customThe volatiles were removed in vacuum
3. customthe residue partitioned between EtOAc (100 ml) and water (100 ml)
4. customThe layers were separated
5. extractionaqueous phase extracted with EtOAc (2×100 ml)
6. washwashed with saturated sodium bicarbonate (aqueous, 100 ml), brine
7. dry with materialdried over Na2SO4
8. filtrationfiltered
9. customthe volatiles removed in vacuum