The efficient DNA cleavage of ϕx 174 DNA is observed in the longer wavelength ( > 350 nm) irradiation of 2-(3-methylthiopropyl)-1H-benz[d,e]isoquinoline-1,3(2H)-diones 1a–e, but not in the cases of 2-isobutyl-1H-benz[d,e]isoquinoline-1,3(2H)-diones 1f, g which is explained by considering the participation of persulfoxirane intermediate 4 in the DNA photocleavage.
S. Matsugo, S. Nakano, K. Adachi and T. Konishi, J. Chem. Soc., Chem. Commun., 1995, 311 DOI: 10.1039/C39950000311
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