Synthesis of Oligonucleotides Containing 2′-Deoxyguanosine Adducts of Nitropyrenes
作者:Laureen C. Colis、Debasis Chakraborti、Pablo Hilario、Christopher McCarty、Ashis K. Basu
DOI:10.1080/15257770902736426
日期:2009.3.11
Two different approaches to synthesize oligonucleotidescontaining 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
Synthesis of <i>N</i><i><sup>2</sup></i> 2‘-Deoxyguanosine Adducts Formed by 1-Nitropyrene
作者:Debasis Chakraborti、Laureen Colis、Renee Schneider、Ashis K. Basu
DOI:10.1021/ol034904b
日期:2003.8.1
[reaction: see text] Synthesis of N(2) 2'-deoxyguanosine adducts formed by the ubiquitous carcinogen, 1-nitropyrene, is reported. Various conditions of Buchwald-Hartwig palladium-catalyzed amination are examined. The most convenient synthetic approach involved a straightforward coupling between protected 2'-deoxyguanosine and bromonitropyrenes, which, upon reductive deprotection, provided excellent
Synthesis and Characterization of Oligodeoxynucleotides Containing the Major DNA Adducts Formed by 1,6- and 1,8-Dinitropyrene
作者:Vandana Purohit、Ashis K. Basu
DOI:10.1021/ol000090c
日期:2000.6.1
[reaction: see text] An efficient method for the synthesis of oligonucleotides containing a site-specific DNA adduct formed by the carcinogens 1,6- and 1, 8-dinitropyrene has been developed. Palladium-catalyzed amination provided a straightforward route for the synthesis of aminonitropyrenes which, following separation, were reduced to the nitrosonitropyrenes. The N-hydroxyaminonitropyrene, generated
Bromination and the Friedel–Crafts acetylation of monosubstituted pyrenes were examined. Acetylation of 1-acetyl- and 1-ethylpyrene occurred at the 8-, 6-, or 3-position, but the reaction of 1-methoxypyrene afforded only the 8- and 6-acetyl derivatives. By acetylation, 4-acetylpyrene yielded the 1- and 6-acetyl compounds, and 4-ethylpyrene gave the 6- and 8- derivatives. Also, 4-bromopyrene afforded