反应详情

To a boiling solution of 6.0 g 2-(4-methoxy-phenyl)-5-methyl-oxazole-4-carboxylic acid ethyl ester in 100 ml tetrachloro-methane were added portionwise a mixture of 1.51 g 2,2′-azobis(2-methylpropionitrile) and 4.9 g N-bromosuccinimide. The reaction mixture was refluxed for three hours. The cooled reaction mixture was filtered over a celite pad and the solvent removed in vacuo to obtain 10.6 g of crude 5-bromomethyl-2-(4-methoxy-phenyl)-oxazole-4-carboxylic acid ethyl ester, which contains to some extend the dibrominated byproduct. The material was used without further purification in the next step.

1. temperatureThe reaction mixture was refluxed for three hours
2. customThe cooled reaction mixture
3. filtrationwas filtered over a celite pad
4. customthe solvent removed in vacuo