Ethylene Glycol → Methyl 8-methyl-1,4-dioxaspiro[4.5]decane-8-carboxylate

Participants

Reaction Steps

Methyl 1-methyl-4-oxocyclohexanecarboxylate (30 g) was dissolved in benzene (300 ml). Ethylene glycol (30 ml) and p-toluenesulfonic acid monohydrate (1 g) were added, and the mixture was refluxed for 4 hours. The water which formed during the heating was removed by using a water trap. After cooling, the mixture was washed with water and dryed (MgSO4). The solvent was distilled off to give methyl 4,4-ethylenedioxy-1-methylcyclohexanecarboxylate as an oil (37.8 g, 100%).

Provenance & Evidence