The reaction between N-tosyldiarylsulfilimines and p-toluenethiolate anion did not take place in the dark even upon heating up to 62° but proceeded smoothly upon irradiation with visible light in DMF at room temperature, affording SN bond cleavage products. ... 2 present address: Institute of organic Synthesis, Academy of Science, Latvia SSR, Riga, 226011, Latvia SSR. 1 present address: Okayama University of Science, Ridai-cho 1-1, Okayama, 700 ...