Are there alternatives to 2-Methyl-2-propanyl 2-hydroxy-7-azaspiro[3.5]nonane-7-carboxylate (CAS: 240401-28-9) in synthesis?

Several alternatives to 2-Methyl-2-propanyl 2-hydroxy-7-azaspiro[3.5]nonane-7-carboxylate (CAS: 240401-28-9) can be considered in synthesis, depending on the specific needs of the reaction. Common alternatives include similar azaspiro compounds with different functionalities, such as 7-oxaspiro[3.5]nonane-7-carboxylic acid, or other cyclic amides with similar structural features. These alternatives can offer comparable reactivity while potentially providing better synthetic accessibility or reactivity.