Potassium Hydroxide → 5-(Chloromethyl)-1,2-oxazole-3-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

14 g (250 mmol) of potassium hydroxide were added to 47.3 g (250 mmol) of ethyl 5-chloromethylisoxazole-3-carboxylate in 150 ml of ethanol, and the reaction mixture was stirred for 6 hours at 60-70° C. After cooling, the mixture was concentrated in vacuo, the residue was taken up in water and extracted with ether, the aqueous phase was acidified with hydrochloric acid and subsequently extracted repeatedly with ether, and the ether phase was dried over sodium sulfate and concentrated in vacuo (oil pump, 50° C.). 31 g of the required product resulted (77% of theory)

Provenance & Evidence