What were the key findings from the experimental results regarding the yield and selectivity of 3,3-dimethylcyclohexanone (2) using the Pd/Amberlyst 15® catalytic system?

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Topic
A study evaluated the performance of the Pd/Amberlyst 15® catalytic system in the hydrogenation of dimedone to 3,3-dimethylcyclohexanone.
Answer
The key findings from the experimental results indicate that using the Pd/Amberlyst 15® catalytic system in methanol, the yield of 3,3-dimethylcyclohexanone (2) reached 97% with a selectivity of 97%. The reaction was easily scalable, and the catalyst could be recycled up to four times with selectivity remaining higher than 95% in each cycle, although the yield decreased slightly in the third and fourth runs.
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