Synthesis of 2,4-diacetylthiazole and 2,5-diacetylthiazole

Compounds 2,4-diacetylthiazole 5 and 2,5-diacetylthiazole 6, of interest for their flavour and aroma properties, have been prepared for the first time by tetrabromination and silver nitrate treatment of the corresponding diethylthiazoles.