Sulfo DBCO-amine

Sulfo DBCO-amine is a functionalized DBCO-based linker designed for efficient, bioorthogonal conjugation workflows that are commonly leveraged in targeted protein degradation research. Its features enable robust attachment of molecular payloads and facilitate the modular assembly of PROTAC architectures through reliable click-type chemistry. The subsequent sections describe the structural attributes and practical reactivity considerations that guide experimental design and successful PROTAC construction using this linker.

Structure: Sulfo DBCO-amine contains a dibenzocyclooctyne (DBCO) core bearing an amine functionality and a sulfonate-containing, water-compatible substituent. The scaffold includes a strained cyclooctyne for rapid cycloaddition and heteroatom-rich groups that support solubility and handleable conjugation chemistry.

Reactivity: This linker participates in strain-promoted azide–alkyne cycloaddition (SPAAC) with azide-bearing partners under catalyst-free conditions, typically in aqueous or mixed solvent systems compatible with biomolecules. The DBCO moiety drives the reaction via favorable ring strain, while the amine group enables pre-functionalization or coupling to complementary PROTAC components using standard amide-forming or related bioconjugation strategies.