Acetic Acid → HCID 15729178, Verbindung
Reaktionsgleichung
[NH2:1][C:2]1[S:3][C:4]([S:7][C:8]2[CH:13]=[CH:12][C:11]([NH2:14])=[CH:10][CH:9]=2)=[CH:5][N:6]=1.[C:15](O)(=[O:17])[CH3:16]>C(OC(=O)C)(=O)C>[NH2:1][C:2]1[S:3][C:4]([S:7][C:8]2[CH:13]=[CH:12][C:11]([NH:14][C:15](=[O:17])[CH3:16])=[CH:10][CH:9]=2)=[CH:5][N:6]=1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
A mixture of 2-amino-5-(4-aminophenylthio)thiazole, (4.0 g) in a mixture of acetic acid (40 ml) and acetic anhydride (2.2 g) was stirred at room temperature for 4 hours. The reaction mixture was concentrated under reduced pressure and the residue was triturated with aqueous sodium bicarbonate. The precipitates were collected by filtration, washed with water and dried in vacuo to give solid. The solid was subjected to column chromatography on silica gel (silica gel 60, 70-230 mesh; Merck: 150 g) and eluted with a mixture of chloroform and methanol (10:1). The fractions containing the objective compound were combined and concentrated under reduced pressure to give 2-amino-5-(4-acetylaminophenylthio)thiazole (2.1 g, yield: 44.2%). mp: 240°-245° C. (dec.)