Toluene → HCID 69316002, compound

Participants

Reaction Steps

103 g (0.5 mol) of 2-methyl-4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2-butenal, 38 g (0.5 mol) of 1,3-propanediol and 1 g of p-toluenesulfonic acid are heated with 200 g of toluene for 2.5 hours in a water separator. After cooling, the mixture is washed with soda solution and dried over sodium sulfate. 3 g of sodium carbonate are added and the mixture is distilled on a 30 cm packed column. At 122-126° C./1.6-0.82 mbar this yields 81 g of product comprising 66% of 2-[1-methyl-3-(2,6,6-trimethyl-1-cyclohexen-1-yl)allyl]-1,3-dioxane and also containing other isomers with double bonds.

Provenance & Evidence