How is 2-Methyl-2-propanyl 2,7-diazaspiro[3.5]nonane-2-carboxylate (CAS: 236406-55-6) typically synthesized?

2-Methyl-2-propanyl 2,7-diazaspiro[3.5]nonane-2-carboxylate (CAS: 236406-55-6) is typically synthesized via a multistep process involving the preparation of a diazabicycloheptane intermediate, followed by esterification with 2-methyl-2-propanol. The synthesis involves standard laboratory techniques and can be carried out using mild conditions, yielding a high purity product with good selectivity and a yield of about 85%.