Cyclododecane → 1-(2,6,6-Trimethyl-1-cyclohexen-1-yl)ethanone

Participants

Reaction Steps

In a 100-ml four-necked flask equipped with a thermometer, a condenser and a stirrer, placed were 2,6,6-trimethyl-3-cyclohexenyl methyl ketone (10 g) synthesized in Referential Example 1, sodium methoxide (2.5 g), dimethyl sulfoxide (30 ml) and, as an internal standard substance for the analysis by gas chromatography, cyclododecane (3 g). They were reacted at 140 to 145° C. for 5 hours. The reaction mixture was treated in an usual manner. Analysis by gas chromatography showed that the content of trans-2,6,6-trimethyl-3-cyclohexenyl methyl ketone was 28.9%, while those of 2,6,6-trimethyl-2-cyclohexenyl methyl ketone and 2,6,6-trimethyl-1-cyclohexenyl methyl ketone produced by the above reaction were 49.2% and 21.9%, respectively. As a result of calculation, the yield of a mixture of these three methyl ketones was found to be 7.3 g.

Provenance & Evidence