反应详情

温度

80 °C

A 688 ml (6.0 mol) portion of mesityl oxide was put into a one liter capacity four neck flask and mixed with 6.30 g (0.02 mol) of barium hydroxide octahydrate and 2.28 g (10 mmol) of benzyltriethylammonium chloride, and the mixture was heated to 80° C. To this was added dropwise 172 ml (2.0 mol) of 4-hydroxy-2-butanone 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 182 g of piperitenone. Yield 62%.

1. customwhile keeping at 80° C
2. additionAfter completion of the dropwise addition
3. distillationthe reaction solution was distilled under a reduced pressure