How is Ethyl (4-oxocyclohexyl)acetate (CAS: 58012-34-3) typically synthesized?

Ethyl (4-oxocyclohexyl)acetate is typically synthesized via a condensation reaction between 4-oxocyclohexanone and acetic acid in the presence of a catalytic amount of a strong acid, such as sulfuric acid. The reaction is carried out at elevated temperatures. The use of a phase transfer catalyst can improve the selectivity and yield of the product.