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    Selective reaction of diphenylcyclopropenone (DPCP) and 1,2-aminothiol in water at pH 7.4 produces an amide conjugate with the release of thiol. In addition, structural modifications of DPCP enable the coupling rate to be tuned with a reaction constant of +3.68. Based on this chemistry, triple labelling was demonstrated by treating an N-terminal cysteine peptide with DPCP-Cl followed by thiol-maleimide and tyrosine-diazonium couplings in one pot. We anticipate that the DPCP motif will be a useful toolkit for multiple bioconjugation.


    Shanshan Liu, Haishun Ye, Long Yi, Zhen Xi. A unique reaction of diphenylcyclopropenone and 1,2-aminothiol with the release of thiol for multiple bioconjugation. Chemical communications (Cambridge, England). 2023 Feb 02;59(11):1497-1500

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    PMID: 36655850

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