Dimethylformamide → Methyl 2-methyl-3-nitrobenzoate

HRID 1988555Notes

Reaction equation

CN([CH:4]=[O:5])C.[CH3:6][C:7]1[C:15]([N+:16]([O-:18])=[O:17])=[CH:14][CH:13]=[CH:12][C:8]=1[C:9](O)=[O:10].IC>O>[CH3:6][C:7]1[C:15]([N+:16]([O-:18])=[O:17])=[CH:14][CH:13]=[CH:12][C:8]=1[C:9]([O:5][CH3:4])=[O:10]

Participants

Conditions

Temperature: 40 °C

Procedure

With reference to FIG. 4, DMF (130 mL) was added to a well mixed 2-methyl-3-nitrobenzoic acid 2 (50 g, 0.28 mol) and KHCO3 (84 g, 0.84 mol) solution. Since the mixture became highly viscous, it was heated to 40° C. with manual shaking. Iodomethane (79 g, 0.56 mol) was added via syringe after the gas evolution had ceased. The resulting orange colored solution was stirred for 12 hours at room temperature. The reaction mixture was poured into water (800 mL), and the resulting precipitate collected by filtration and dried over P2O5 to give pure methyl 2-methyl-3-nitrobenzoate 3 (56 g, 100%) as a white solid: mp. 64.2-65.5° C.; 1H-NMR (CDCl3) δ 8.00 (d, J=7.8 Hz, 1H), 7.85 (d, J=8.0 Hz, 1H), 7.39 (t, J=8.0 Hz, 1H), 3.95 (s, 3H), 2.63 (s, 3H); IR (KBr, cm−1) 1724, 1548, 1279; MS (EI): 195 (M+).

Workup

filtrationthe resulting precipitate collected by filtration
dry with materialdried over P2O5

Sources & evidence

ORD record: ord-20223ad5f898485caa3e67541fb9ed32
Source dataset: uspto-grants-2010_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07642231B2

Reaction notes

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