Sulfuric Acid → 4-(4-trifluoromethyl-phenyl)-3H-thiazol-2-one
Reaction equation
[S:1]([CH2:4][C:5]([C:7]1[CH:12]=[CH:11][C:10]([C:13]([F:16])([F:15])[F:14])=[CH:9][CH:8]=1)=O)[C:2]#[N:3].S(=O)(=O)(O)[OH:18]>C(O)(=O)C>[F:14][C:13]([F:16])([F:15])[C:10]1[CH:11]=[CH:12][C:7]([C:5]2[NH:3][C:2](=[O:18])[S:1][CH:4]=2)=[CH:8][CH:9]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
A mixture of 22.52 g (91.8 mmole) of 2-thiocyanato-1-(4-trifluoromethyl-phenyl)-ethanone 9 mL of 50% aqueous sulfuric acid and 45 mL of acetic acid was heated at reflux for 1.5 hours. The mixture was cooled, poured into 500 mL of ice water and stirred for 30 minutes. The solid was collected by filtration, washing with water, to give 21.33 g of 4-(4-trifluoromethyl-phenyl)-3H-thiazol-2-one as a tan solid.