Water → 5-Bromo-2,3-diaminobenzotrifluoride
Reaction equation
[NH2:1][C:2]1[C:7]([N+:8]([O-])=O)=[CH:6][C:5]([Br:11])=[CH:4][C:3]=1[C:12]([F:15])([F:14])[F:13].Cl[Sn]Cl.O.C([O-])(O)=O.[Na+]>C(O)C>[NH2:1][C:2]1[C:7]([NH2:8])=[CH:6][C:5]([Br:11])=[CH:4][C:3]=1[C:12]([F:15])([F:13])[F:14]Participants
6
Conditions
- Temperature
- 90 °C
Procedure
To a stirred mixture of 2-amino-5-bromo-3-nitrobenzotrifluoride (261 mg, 0.949 mmol) in ethanol (4 mL) was added SnCl2.2 H2O (1.076 g, 4.745 mmol) in one portion. The mixture was refluxed at 80° C. (oil bath 90° C.) for 1 h. The solution was cooled to room temperature and ice water (20 g) was added. It was adjusted to pH=7 with NaHCO3 and extracted by ethyl acetate (2×4 mL). The extract was dried over Mg2SO4 and evaporated to give 150 mg (64.6%) of 2,3-diamino-5-bromobenzotrifluoride as a brown solid. 1H NMR (CDCl3): δ 3.503 (s, 2H); 3.898 (s, 2H); 6.987 (d, 1H, J=1.8 Hz); 7.123 (d, 1H, J=1.8 Hz).
Workup
- temperatureThe solution was cooled to room temperature
- extractionextracted by ethyl acetate (2×4 mL)
- dry with materialThe extract was dried over Mg2SO4
- customevaporated
Sources & evidence
- ORD record
- ord-66c4b3eeda044bfb8ef56a90bd7639df
- Source dataset
- uspto-grants-1997_04
- Patent number
- US05620979
Reaction notes
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