How is 2-Methyl-2-propanyl 7-azaspiro[3.5]non-2-ylcarbamate (CAS: 147611-03-8) typically synthesized?

2-Methyl-2-propanyl 7-azaspiro[3.5]non-2-ylcarbamate is commonly synthesized via a multistep process involving alkylation and amidation reactions. The key steps include the preparation of the azaspiro derivative from a primary amine and a ketone, followed by alkylation with 2-methyl-2-propanol. The reaction is typically carried out under basic conditions, and yields can be improved by careful selection of catalysts and solvents.