Ethyl isothiocyanatoformate → HCID 57643101, Verbindung
Reaktionsgleichung
[Br:1][C:2]1[CH:7]=[CH:6][N:5]=[C:4]([NH2:8])[CH:3]=1.[CH2:9]([O:11][C:12]([N:14]=[C:15]=[S:16])=[O:13])[CH3:10]>O1CCOCC1>[CH2:9]([O:11][C:12]([NH:14][C:15]([NH:8][C:4]1[CH:3]=[C:2]([Br:1])[CH:7]=[CH:6][N:5]=1)=[S:16])=[O:13])[CH3:10]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- 25 °C
Versuchsvorschrift
To a solution of 4-bromopyridin-2-amine (10.4 g, 60.1 mmol) in dioxane (242 ml) is added ethoxycarbonyl isothiocyanate (7.88 g, 6.8 ml, 60.1 mmol) at 25° C. The resulting mixture is stirred for 4 hours at 25° C. The solvent is evaporated, the solid yellow residue diluted with ethyl acetate and washed with water and brine. The organic layer is separated, dried over magnesium sulfate and the solvent is removed in vacuo affording 1-ethoxycarbonyl-3-(4-bromo-pyridin-2-yl)-thiourea (17.37 g, 95%) as a yellow solid. mp.: 107-110° C. MS: m/z=304.0, 305.9 (M+H+).