Benzoic acid, 4-hydroxy-3-nitro-, methyl ester → Methyl 3-amino-4-hydroxybenzoate
반응식
[OH:1][C:2]1[CH:11]=[CH:10][C:5]([C:6]([O:8][CH3:9])=[O:7])=[CH:4][C:3]=1[N+:12]([O-])=O>CO.[Pd]>[NH2:12][C:3]1[CH:4]=[C:5]([CH:10]=[CH:11][C:2]=1[OH:1])[C:6]([O:8][CH3:9])=[O:7]참가 물질
4
실험 절차
A stirred mixture of methyl 4-hydroxy-3-nitrobenzoate (3.22 g, 0.0163 mol) and 5% Pd—C (12.9 g) in MeOH (30mL) was hydrogenated under an atmospheric pressure for 70 hr at room temp. Insoluble catalyst was removed, and the filtrate was evaporated in vacuo. The residue was chromatographed on silica-gel with EtOH—CHCl3 (1:20, v/v) as eluent to afford 1.89 g (69%) methyl 3-amino-4-hydroxybenzoate as a pale brown syrup.
후처리
- customInsoluble catalyst was removed
- customthe filtrate was evaporated in vacuo
- customThe residue was chromatographed on silica-gel with EtOH—CHCl3 (1:20, v/v) as eluent
출처 및 근거
- ORD 기록
- ord-795f063488d54799ad89dd33cb14ff31
- 출처 데이터셋
- uspto-grants-2007_02
- 특허 번호
- US07179819B2
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