Figure 2.
a) Overview of current side-chains that can be attached via radical additions to canonical AAs. b) Selected mechanisms for some common approaches to “off-protein” carbon-centered C• radicals with utility in reactions with canonical AAs. These include (i) sulfinate salts in conjunction with direct oxidant43−45 e.g. TBHP; (ii) sulfinate salts in conjunction with photocatalytic oxidant;46 and (iii) hypervalent iodine salts in conjunction with ascorbate salts.47