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

Participants

Reaction Steps

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 mixture is concentrated and the residue 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%). LC-MS: 278 (M+1)

Provenance & Evidence