Oxidation of diverse, DNA-linked, primary activated alcohols to the corresponding aldehydes. Reaction conditions: DNA (1 equiv, 1 nmol), Cu(ClO4)2 (100 equiv, 20 μL of 5 mM stock in MeCN), TEMPO (100 equiv, 20 μL of 5 mM stock in MeCN), bipyridine (100 equiv, 20 μL of 5 mM in MeCN), H2O/250 mM borate buffer pH 9.5/MeCN (v/v/v 52.5/16.5/31 −194 μL total volume), rt, 12 hours.