Description
9-(Azide-PEG9-ethylcarbamoyl)nonanoic t-butyl ester acts as another PEG linker containing both an azide group and a t-butyl ester functionality. As previously mentioned, its reactive azide can participate in click chemistry processes involving alkynes such as BCN or DBCO leading to stable triazole linkages being formed while allowing deprotection of the t-butyl protected carboxylic acid under acidic conditions.