Diazomethane → 2,4,5-Trimethyl-1,2-oxazol-3(2H)-one

Participants

Reaction Steps

To a solution of 3-hydroxy-4,5-dimethylisoxazole (7 g, 62 mmol) in ether (50 mL) was added diazomethane until a persistent yellow colour was obtained. The reaction was stirred for another 30 min at room temperature. The ether was evaporated off and the residue purified by column chromatography on silica gel suing either as eluent. 4 g of the desired material was obtained.

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