SYNTHESIS OF OLIGONUCLEOTIDES CONTAINING 2′-DEOXYGUANOSINE ADDUCTS OF NITROPYRENES

Two different approaches to synthesize oligonucleotides containing the 2′-deoxyguanosine adducts formed by nitropyrenes are described. A direct reaction of an unmodified oligonucleotide with an activated nitropyrene derivative is a convenient biomimetic approach for generating the major adducts in DNA. A total synthetic approach, by contrast, involves several synthetic steps, including Buchwald-Hartwig Pd-catalyzed coupling, but can be used for incorporating both the major and minor adducts in DNA in high yield.