2-Methoxypropene → 6,10,14-Trimethylpentadeca-3,5-dien-2-one

Participants

Reaction Conditions

Reaction Steps

190 g of 3,7,11-trimethyldodec-1-yn-3-ol (purity 95%, 0.848 mol) and 200 g of 2-methoxypropene (2.78 mol) and 0.58 g of KHSO4, dissolved in 1.74 g of water, were introduced into a pressure-resistant vessel. The reactor was flushed with nitrogen and closed. After a reaction time of 1 hour at 120° C., the mixture was cooled to about 50° C. and a further 0.58 g of KHSO4, dissolved in 1.74 g of water, was added. The mixture was once again heated to 120° C. After a reaction time of one hour, the reaction was complete. Distillation was carried out as in Example 1.147 g of a mixture comprising mainly 2-methoxypropene and 2,2-dimethoxypropane and 213 g of a fraction comprising 1.6% of 3,7,11-trimethyldodec-1-yn-3-ol, 67% of 6,10,14-trimethylpentadeca-4,5-dien-2-one, and 7.3% of 6,10,14-trimethylpentadeca-3,5-dien-2-one were obtained.

Provenance & Evidence