The use of benzophenone (BP) photophores in biochemistry has increased considerably during the past 10 years, owing to their advantages over previously employed diazoester, azide, and diazirine probes. 1 In particular, the development of 4-benzoyl-l-phenylalanine (BPA, 1a), 2 a BP-containing amino acid, brought a significant advance in the application of photoaffinity labeling to the study of peptide–protein interactions. ... Aryl iodides can be carbonylatively ...