This invention provides a method for
protein functionalization involving post-translational modification in a manner that is selective, reliable, and under the possibility of benign, moderate
redox, enabling the addition of reactive functional side chains. [Solution] The present invention relates to photoredox-mediated functionalization of proteins at
chemical groups via radical generation and CC
bond formation using specific boronate and
sulfone precursor compounds. The present invention also relates to functionalized proteins that can be produced by this method, and the specific boronate and
sulfone precursor compounds themselves.