Ethyl 2-chloroacetoacetate → Ethyl 2-(4-methoxyphenyl)-4-methyl-1,3-thiazole-5-carboxylate

Beteiligte Stoffe

Reaktionsschritte

A mixture of 4-methoxy-thiobenzamide (5 g, 30 mmol) and 2-chloro-3-oxo-butyric acid ethyl ester (4.6 mL, 33 mmol) in ethanol is stirred under reflux overnight. The reaction is concentrated and the residue is triturated with ether to give 2-(4-methoxy-phenyl)-4-methyl-thiazole-5-carboxylic acid ethyl ester as a yellow solid (5.8 g, 70%).

Herkunft & Nachweise