反应详情

To a soln. of methyl 4-(dimethylcarbamoyl)benzoate (100 mg, 0.483 mmol, crude from above preparation) in MeOH (4 ml) was added LiOH (1 ml, 3.00 mmol). The mixture was stirred at r.t for 1.5 hrs. Evaporated to remove the solvent. The residue was dissolved in water (3 ml), neutralized w/6M HCl to PH=3, extracted w/EtOAc (3×). The combined organic layer was dried (Na2SO4) and evaporated to afford 4-(dimethylcarbamoyl)benzoic acid (64 mg, 0.315 mmol, 65.2% yield) as solid, which was used for the next reaction directly.

1. customEvaporated
2. customto remove the solvent
3. dissolutionThe residue was dissolved in water (3 ml)
4. extractionextracted w/EtOAc (3×)
5. dry with materialThe combined organic layer was dried (Na2SO4)
6. customevaporated