Methyl iodide → Methyl 2-methyl-3-nitro-5-(trifluoromethyl)benzoate

HRID 2208661Notes

Reaction equation

[CH3:1][C:2]1[C:10]([N+:11]([O-:13])=[O:12])=[CH:9][C:8]([C:14]([F:17])([F:16])[F:15])=[CH:7][C:3]=1[C:4]([OH:6])=[O:5].[C:18](=O)([O-])[O-].[K+].[K+].CI>CN(C=O)C>[CH3:1][C:2]1[C:10]([N+:11]([O-:13])=[O:12])=[CH:9][C:8]([C:14]([F:15])([F:16])[F:17])=[CH:7][C:3]=1[C:4]([O:6][CH3:18])=[O:5]

Participants

Conditions

Temperature: 60 °C

Procedure

To a solution of 2-methyl-3-nitro-5-(trifluoromethyl)benzoic acid (21.0 g, 84.3 mmol) in DMF (200 mL) was added potassium carbonate (35.0 g, 253 mmol) and methyl iodide (24.0 g, 169 mmol). The mixture was stirred at 60° C. and after stirring for 6 h the reaction mixture was cooled to 23° C. and was filtered. The filtrate was concentrated in vacuo and the residue was dissolved in EtOAc and water. The aqueous phase was extracted with EtOAc (2×250 mL and the combined organic layers were concentrated in vacuo. The residue was purified by column chromatography (SiO2 heptane-EtOac=4/1) to give the titled compound (20.0 g, 90% yield). 1H-NMR (400 MHz, CDCl3) δ (ppm); 8.27 (s, 1H), 8.11 (s, 1H), 3.99 (s, 3H), 2.71 (s, 3H); MS (ES) [M−H] 261.9.

Workup

stirringafter stirring for 6 h the reaction mixture
temperaturewas cooled to 23° C.
filtrationwas filtered
concentrationThe filtrate was concentrated in vacuo
dissolutionthe residue was dissolved in EtOAc
extractionThe aqueous phase was extracted with EtOAc (2×250 mL
concentrationthe combined organic layers were concentrated in vacuo
customThe residue was purified by column chromatography (SiO2 heptane-EtOac=4/1)

Sources & evidence

ORD record: ord-4fc0f9fad0d44f32b7035955d42d1084
Source dataset: uspto-grants-2016_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09376422B2

Reaction notes

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