Ammonium Hydroxide → 4-Methyl-2-nitrobenzamide

To a solution of 4-methyl-2-nitrobenzoic acid (1.0 g, 5.52 mmol) in toluene (5 mL) was added oxalyl chloride (1.04 g, 8.28 mmol) at 0° C. and the reaction mixture was stirred at rt for 2 h. Then the reaction mixture was concentrated and the concentrate was dissolved in THF (5 mL). Then NH4OH (1.93 g, 55.20 mmol) was added to the solution at 0-5° C. and the reaction mixture was stirred at rt for 4 h before it was quenched with water and was extracted with EtOAc. The organic layer was washed with brine, separated, dried, filtered and concentrated to afford 1.6 g of the desired product. 1H NMR (300 MHz, DMSO-d6): δ 8.08 (br s, 1H), 7.79 (s, 1H), 7.62 (br s, 1H), 7.57-7.50 (m, 2H), 2.41 (s, 3H).

1. concentrationThen the reaction mixture was concentrated
2. dissolutionthe concentrate was dissolved in THF (5 mL)
3. stirringthe reaction mixture was stirred at rt for 4 h before it
4. customwas quenched with water
5. extractionwas extracted with EtOAc
6. washThe organic layer was washed with brine
7. customseparated
8. customdried
9. filtrationfiltered
10. concentrationconcentrated

ORD-Eintrag

ord-356b990816db44e093bb45f3d85d6216

Quelldatensatz

uspto-grants-2015_04

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09006257B2