Acetic Acid → HCID 54162586, compound

Participants

Reaction Steps

17 g of potassium hydroxide were dissolved in 125 ml of water and 125 ml of methanol, and 150 g of 4-methoxyacetophenone were added. 80 g of isobutyraldehyde were added dropwise (in the course of 1.5 hours) at 50° C. After 3.5 hours, the mixture was cooled to room temperature and neutralized with acetic acid (about 20 ml). The dimeric condensation product was filtered off, washed with methanol and dried in air. Yield: 175 g. The solid was mixed with 5 g of sodium acetate and the mixture was distilled under a waterpump vacuum. 165 g of a yellow oil which solidified at room temperature and was a mixture of 2-methyl-5-oxo-5-(4'-methoxyphenyl)-2-pentene and 2-methyl-5-oxo-5-(4'-methoxyphenyl)-3-pentene were obtained. Boiling point of the isomer mixture=158°-165° C./17 mbars.

Provenance & Evidence