How is 3,5,5-Trimethyl-1,2-cyclohexanedione (CAS: 57696-89-6) typically synthesized?

3,5,5-Trimethyl-1,2-cyclohexanedione (CAS: 57696-89-6) can be synthesized via a catalytic hydrogenation of 3,5,5-trimethylcyclohexanone. Commonly, this involves the use of a palladium catalyst under hydrogen pressure. The reaction yields a high level of product with good selectivity, typically in the range of 85-95% yield, depending on the reaction conditions and catalyst choice.