Abstract Nitrations of some sensitive thiazole derivatives with trifluoromethanesulfonic acid- trifluoro-methanesulfonic anhydride.-potassium nitrate in 1, 2-dichloroethane gave significantly higher yields of the nitro compounds in comparison with nitrations in sulfuric acid-nitric acid mixtures.
![Acetamide,N-[5-(1-methylethyl)-4-nitro-2-thiazolyl]- Structure](https://image.chemsrc.com/caspic/225/64932-40-7.png)
![N-[4-(Trifluoromethyl)-1,3-thiazol-2-yl]acetamide Structure](https://image.chemsrc.com/caspic/080/64932-39-4.png)