Ethyl thiooxamate → Ethyl 4-(3-chloro-4-fluorophenyl)-1,3-thiazole-2-carboxylate

Participants

Reaction Steps

1.35 g of the compound from Example 1A having a purity of 68% (5.37 mmol) are heated under reflux in 25 ml of ethanol, a solution of 0.72 g (5.37 mmol) of ethyl amino(thioxo)acetate and 10 ml of ethanol is added dropwise and the mixture is heated under reflux for 18 hours. The reaction mixture is concentrated and the residue is purified by flash chromatography (mobile phase: cyclohexane/ethyl acetate 10:1), and 1.94 g of the title compound having a purity of 57% (100% of theory) are obtained.

Provenance & Evidence