Phosphorus pentachloride → HCID 10448313, compound
Reaction equation
[F:1][C:2]1[CH:20]=[C:19]([F:21])[CH:18]=[CH:17][C:3]=1[O:4][C:5]1[CH:6]=[C:7]([CH:11]=[CH:12][C:13]=1[N+:14]([O-:16])=[O:15])[C:8](O)=[O:9].P(Cl)(Cl)(Cl)(Cl)[Cl:23]>C1C=CC=CC=1>[F:1][C:2]1[CH:20]=[C:19]([F:21])[CH:18]=[CH:17][C:3]=1[O:4][C:5]1[CH:6]=[C:7]([CH:11]=[CH:12][C:13]=1[N+:14]([O-:16])=[O:15])[C:8]([Cl:23])=[O:9]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
A mixture of 3-(2,4-difluorophenoxy)-4-nitrobenzoic acid (1.5 g) and phosphorus pentachloride (1.1 g) in benzene (10 ml) was stirred for 1 hour at room temperature. The mixture was concentrated under reduced pressure to give crystals of 3-(2,4-difluorophenoxy)-4-nitrobenzoyl chloride. A solution of the above chloride in dichloromethane (5 ml) was added to a mixture of methoxylamine hydrochloride (0.85 g) and sodium bicarbonate (2.2 g) in water (10 ml) and dichloromethane (5 ml) at to 5° C. After stirring for 1 hour at the same temperature, the mixture was extracted with ethyl acetate. The extract was washed with water, dried, and concentrated. The residue was crystallized from isopropyl ether to give pale brown crystals of N-methoxy-3-(2,4-difluorophenoxy)-4-nitrobenzamide (1.2 g).