Methyl vinyl ketone → Piperitenone

Participants

Reaction Conditions

Reaction Steps

A 688 ml (6.0 mol) portion of mesityl oxide was put into a one liter capacity four neck flask and mixed with 13.82 g (0.1 mol) of potassium carbonate and 2.28 g (10 mmol) of benzyltriethylammonium chloride, and the mixture was heated to 80° C. To this was added dropwise 166.48 ml (2.0 mol) of methyl vinyl ketone spending 1 hour while keeping at 80° C. After completion of the dropwise addition, this was stirred for 30 minutes and then the reaction solution was distilled under a reduced pressure to obtain 186 g of piperitenone. Yield 62%.

Provenance & Evidence