4,6,6-Trimethyl-1,3-cyclohexadiene-1-carboxaldehyde → 2,2,4-Trimethyl-1-cyclohexanecarbaldehyde

Participants

Reaction Steps

4,6,6-Trimethyl-1,3-cyclohexadiene-1-carbaldehyde (100.0 g, 0.66 mole), 11 of ethyl acetate and 0.3 g of palladium on charcoal (0.3 g) were hydrogenated as described in Example 1, over 3 days. The H2-consumption was 35 1. The mixture was then heated with pyridin chlorochromate to oxidize the amounts of alcohol formed. After filtration and concentration, the product was distilled at 65-73°/18 hPa, to obtain 68.8 g (67%) of the desired product in the form of a mixture of 2 isomers in a ratio of 1:3.

Provenance & Evidence