3-acetylheptane-2,6-dione

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 10.2 g of 3-acetyl-2,6-heptandione and 5 drops of 1,8-diazabicyclo-[5.4.0]-undec-7-ene were mixed, and 9 g of ethyl acrylate was added dropwise over 15 minutes. After stirring for 16 hours, the base was neutralized with acetic acid, 30 ml of diethyl ether was added, and the solution was extracted with sodium carbonate solution and water. Fractional distillation of the dry organic layer yielded 9.3 g of 4,4-diacetyl-7-oxo-octanoic-ethyl ester (boiling point: 136° C./0.02 mbar; purity: 81%; colorless). was added the solution was extracted with sodium carbonate solution and water Fractional distillation of the dry organic layer

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 60 g of 2,4-pentandione and 0.1 g of triethyl amine were mixed, and 28 g of 2-butanone was added dropwise at room temperature. The mixture was stirred for 42 hours and the raw product was distilled off. Re-distillation gave 31.4 g of 3-acetyl-2,6-heptandione. the raw product was distilled off