Near-UV irradiation of N-arenesulfonyl amino acids in aqueous solution in the presence of a water-soluble 1, 5-dialkoxynaphthalene as light absorber and single electron source results in cleavage of the sulfonamide with very sub-stoichiometric release of the intact amino acid because of concurrent decarboxylation during photocleavage. In compounds with a single carboxylate group ortho to the sulfonamide this decarboxylation is significantly ...
