3-Methyl-2-butenoic acid → 4,8-Dimethylnona-3,7-dien-2-one

Beteiligte Stoffe

Reaktionsschritte

110 parts of 4-methyl-2,4-pentadien-2-yl acetate and 60 parts of prenol are heated with 1.4 parts of 3,3-dimethylacrylic acid at about 180°C for 4 hours in a small pressure column at a pressure of 2 atmospheres, the acetic acid formed being distilled off continuously. Fractional distillation of the reaction product gives 61.8 parts of 4,8-dimethyl-3,7-nonadien-2-one (yield 86% of theory, conversion 62% based on prenol).

Herkunft & Nachweise