Phosgene → HCID 11964606, Verbindung
Reaktionsgleichung
[CH3:1][O:2][C:3](=[O:18])[C:4]1[CH:9]=[C:8]([N+:10]([O-:12])=[O:11])[C:7]([C:13]([F:16])([F:15])[F:14])=[CH:6][C:5]=1[NH2:17].[C:19](Cl)(Cl)=[O:20]>C1(C)C=CC=CC=1>[CH3:1][O:2][C:3](=[O:18])[C:4]1[CH:9]=[C:8]([N+:10]([O-:12])=[O:11])[C:7]([C:13]([F:16])([F:15])[F:14])=[CH:6][C:5]=1[N:17]=[C:19]=[O:20]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
To a suspension of 2-amino-5-nitro-4-trifluoromethyl-benzoic acid methyl ester (100 mg, 0.379 mmol) in dry toluene (1.5 mL) was added a solution of phosgene in toluene (20%, 1.5 mL) at −15° C. After warming to r.t., a stream of phosgene was introduced into the suspension and simultaneously heating was started. At reflux, the stream of phosgene was maintained for one hour, then replaced by a stream of argon for an additional hour. The toluene was distilled off leaving 2-isocyanato-5-nitro-4-trifluoromethyl-benzoic acid methyl ester (110 mg, 100%) as a beige solid. IR (CHCl3): 2260 cm−1 (s). 1H-NMR (CDCl3, 360 MHz): 4.05 (s, 3H), 7.55 (s, 1H), 8.65 (s, 1H).