Dimethylformamide → 4-Chloro-2-fluoro-5-(pentyloxycarbonylmethyloxy)nitrobenzene

HRID 704089

Reaktionsgleichung

[Cl:1][C:2]1[CH:7]=[C:6]([F:8])[C:5]([N+:9]([O-:11])=[O:10])=[CH:4][C:3]=1[OH:12].C(=O)([O-])[O-].[K+].[K+].CN(C)C=O.Cl[CH2:25][C:26]([O:28][CH2:29][CH2:30][CH2:31][CH2:32][CH3:33])=[O:27]>O>[Cl:1][C:2]1[C:3]([O:12][CH2:25][C:26]([O:28][CH2:29][CH2:30][CH2:31][CH2:32][CH3:33])=[O:27])=[CH:4][C:5]([N+:9]([O-:11])=[O:10])=[C:6]([F:8])[CH:7]=1

Komponenten

Reaktionsbedingungen

Temperatur: 50 °C

Versuchsvorschrift

A mixture of 2-chloro-4-fluoro-5-nitrophenol (100 g), anhydrous potassium carbonate (86.6 g) and dimethylformamide (500 g) was heated at 50° C., and amyl 2-chloroacetate (90.2 g) was dropwise added thereto in 30 minutes, followed by allowing to stand at 60° C. for 4 hours. The reaction mixture was cooled to room temperature, and water (1500 g) was added thereto, followed by extraction with ethyl acetate (1500 g). The organic layer was separated, washed with water and concentrated under reduced pressure. The residue was distilled under reduced pressure to give 4-chloro-2-fluoro-5-(pentyloxycarbonylmethyloxy)nitrobenzene (Compound (III)) (129 g) as a pale yellow oil. Yield, 77%. b.p., 160°-165° C./0.7 mmHg.

Aufarbeitung

waitto stand at 60° C. for 4 hours
temperatureThe reaction mixture was cooled to room temperature
extractionfollowed by extraction with ethyl acetate (1500 g)
customThe organic layer was separated
washwashed with water
concentrationconcentrated under reduced pressure
distillationThe residue was distilled under reduced pressure

Quellen und Nachweise

ORD-Eintrag: ord-4e61f74ca11c4edcacad9de6e4ffc51c
Quelldatensatz: uspto-grants-1991_01
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US04985570

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