Scheme 3.
(A) Formation of T(−H)• via one-electron oxidation of N3-deprotonated thymine anion in dThd (R' = 2'-deoxyribose) and its various derivatives (e.g., L-dThd, α-dThd) and nucleotides (e.g., for 5'-TMP, R' = 2'-deoxyribose-5'-phosphate). (B) The production of N3-Me-dThd•+ by one-electron oxidation of N3-Me-dThd.