copper(II)-promoted free-radical oxidativedifunctionalization of terminalalkenes to access ketoazides by utilizing molecularoxygen has been reported. A series of styrene derivatives have been evaluated and were found to be compatible to give the desired difunctionalized products in moderate to good yields. The role of molecularoxygen both as an oxidant and oxygen atom source in this catalytic transformation
Irradiation of azido carbonyl compounds using UV light (>= 310 nm) produced triplet alkyl nitrenes and aroyl radicals, which resulted in efficient cleavage of single strand DNA at pH 7.0. DNA cleaving ability of azido carbonyl compounds was found to be dependent on its concentration and substituents on its aromatic ring. Further, newly synthesized naphthalene based azido carbonyl compounds showed DNA cleavage ability at longer wavelength of UV light (>= 350 nm) and also binding studies revealed that they bind to ct-DNA by weak intercalation mode. (C) 2012 Elsevier B.V. All rights reserved.