tert-butyl 8-hydroxy-6-thia-2-azaspiro[3.4]octane-2-carboxylate
The tert-butyl ester protects the carboxyl functionality, while the hydroxy group provides a reactive site for functionalization, including etherification, esterification, or coupling reactions.
![tert-butyl 8-hydroxy-6-thia-2-azaspiro[3.4]octane-2-carboxylate](https://navyachempharma.com/wp-content/uploads/2025/08/catalog3-img43.jpg)



![2-amino-6-phenyl-4-(3,4,5-trimethoxyphenyl)thieno[2,3-b]pyridine-3-carboxylic acid](https://navyachempharma.com/wp-content/uploads/2025/08/16-7.png)
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