1-Piperidinecarboxylic acid, 4-(3-butyn-1-yl)-, 1,1-dimethylethyl ester

Boc-Pip-butyn is an Alkyl/ether-based PROTAC linker[1].

[1]. Yulu Zhou, et al. Photocatalytic Sulfonylcarbocyclization of Alkynes Using SEt as a Traceless Directing Group: Access to Cyclopentenes and Indenes. Angew Chem Int Ed Engl. 2022 Jan 3;61(1):e202110864.