Methyl iodide → Methyl 5-bromo-2-methyl-3-nitrobenzoate
Reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([N+:12]([O-:14])=[O:13])[C:5]([CH3:11])=[C:6]([CH:10]=1)[C:7]([OH:9])=[O:8].[C:15](=O)([O-])[O-].[Na+].[Na+].CI>CN(C=O)C>[Br:1][C:2]1[CH:3]=[C:4]([N+:12]([O-:14])=[O:13])[C:5]([CH3:11])=[C:6]([CH:10]=1)[C:7]([O:9][CH3:15])=[O:8]Participants
Reactant 3
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 60 °C
Procedure
To a stirred solution of 5-bromo-2-methyl-3-nitrobenzoic acid (285 g, 1104.65 mmol) in DMF (2.8 L) was added sodium carbonate (468 g, 4415.09 mmol) followed by addition of methyl iodide (626.63 g, 4415 mmol) at room temperature. The resulting reaction mixture was stirred at 60° C. for 8 h. The reaction mixture was then filtered to remove suspended solids which were washed well with ethyl acetate (3×1 L). The combined filtrates were washed well with water (5×3 L) and the aqueous phase back extracted with ethyl acetate (3×1 L). The combined organic extracts dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to afford methyl 5-bromo-2-methyl-3-nitrobenzoate as an off-white solid (290 g, 97% yield). 1H NMR (CDCl3, 400 MHz) δ 8.17 (s, 1H), 7.91 (s, 1H), 3.96 (s, 3H), 2.59 (s, 3H).
Workup
- customThe resulting reaction mixture
- filtrationThe reaction mixture was then filtered
- customto remove
- washwere washed well with ethyl acetate (3×1 L)
- washThe combined filtrates were washed well with water (5×3 L)
- extractionthe aqueous phase back extracted with ethyl acetate (3×1 L)
- dry with materialThe combined organic extracts dried over anhydrous sodium sulfate
- filtrationfiltered
- concentrationconcentrated under reduced pressure
Sources & evidence
- ORD record
- ord-383570ae3c4244a195a38f1cf39cc27c
- Source dataset
- uspto-grants-2013_04
- Patent number
- US08410088B2
Reaction notes
Loading…