2-Methylimidazole → 1-(2-fluoro-4-nitrophenyl)-2-methyl-1H-imidazole

2-Methylimidazole (9.02 g, 0.11 M) and N,N-diisopropylethylamine (32.2 g, 0.25 M) were dissolved in acetonitrile (160 ml), and 3,4-difluoronitrobenzene (15.9 g, 0.1 M) added. The mixture was stirred and heated to reflux under nitrogen for 24 hours. Solvent was evaporated, the residue dissolved in ethyl acetate (300 ml), washed with water (150 ml), brine (150 ml), and dried (magnesium sulfate). The residue was recrystallised from a mixture of ethyl acetate (25 ml) and cyclohexane (150 ml) with the addition of charcoal to give the title compound (11.5 g), mp 106–107°.

1. temperatureheated
2. temperatureto reflux under nitrogen for 24 hours
3. customSolvent was evaporated
4. dissolutionthe residue dissolved in ethyl acetate (300 ml)
5. washwashed with water (150 ml), brine (150 ml)
6. dry with materialdried (magnesium sulfate)
7. customThe residue was recrystallised from a mixture of ethyl acetate (25 ml) and cyclohexane (150 ml) with the addition of charcoal

ORD-Eintrag

ord-29e51974d6614de39e82ca9826379728

Quelldatensatz

uspto-grants-2006_08

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07087629B2