Methanol → 2-Methoxy-4-nitro-1-(trifluoromethyl)benzene

Temperature

0 °C

Using the procedure for Example 113C, in a 100 mL round bottomed flask, sodium hydride (276 mg. 11.5 mmol) was suspended in 30 mL of a dry THF and cooled to 0° C. To this solution methanol (427 μL, 10.56 mmol) was added and stirred for 30 minutes. This solution 2-fluoro-4-nitro-1-trifluoromethyl-benzene (2.0 g, 9.6 mmol) was added as a 2 mL THF solution. The reaction was allowed to warm to room temperature overnight with stirring. The reaction was concentrated and then partitioned between ethyl acetate and water, extracting twice. The extracts were dried with magnesium sulfate, filtered and concentrated. The nitro compound was purified by silica gel chromatography using a gradient of ethyl acetate/hexane 0-50% over 60 minutes. The main peak was collected, and concentrated to afford 2-methoxy-4-nitro-1-trifluoromethyl-benzene as an oil weighing 1.16 g. 1H NMR (300 MHz, DMSO-d6) δ 8.0-7.9 (m, 3H), 3.9 (s, 3H)

1. temperatureto warm to room temperature overnight
2. stirringwith stirring
3. concentrationThe reaction was concentrated
4. custompartitioned between ethyl acetate and water
5. extractionextracting twice
6. dry with materialThe extracts were dried with magnesium sulfate
7. filtrationfiltered
8. concentrationconcentrated
9. customThe nitro compound was purified by silica gel chromatography
10. customover 60 minutes
11. customThe main peak was collected
12. concentrationconcentrated

ORD record

ord-479cccb5d81d4a10991db78c10a451cc

Source dataset

uspto-grants-2013_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08618289B2