A Stable Precursor for Bioorthogonally Removable 3-Isocyanopropyloxycarbonyl (ICPrc) Protecting Groups
2020
Studies have established 3-isocyanopropyloxycarbonyl (ICPrc) moieties as bioorthogonally removable protecting groups. However, reagents to prepare ICPrc-protected amines are unstable, which critically limits the practical implementation of this chemistry. Here we report 3-isocyanopropyl (pentafluorophenyl) carbonates as bench-stable precursors for the synthesis of ICPrc-protected primary and secondary amines. The utility of the chemistry for bioconjugation applications is demonstrated by reversibly masking a lysine residue on a bioactive peptide.
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