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
Pd−Xantphos-Catalyzed Direct Arylation of Nucleosides
作者:Felix N. Ngassa、Kyle A. DeKorver、Theothora S. Melistas、Edmund A.-H. Yeh、Mahesh K. Lakshman
DOI:10.1021/ol0619516
日期:2006.9.1
Direct arylation of the exocyclic amino groups of nucleosides represents a simple approach to N-aryl nucleoside derivatives. To date, one limitation has been that only electron-deficient aryl bromides and triflates possessed adequate reactivity for efficient, direct N-arylation of nucleosides. We demonstrate herein that Pd-Xantphos catalytic systems lead to successful N-arylation of suitably protected 2'-deoxyadenosine and 2'-deoxyguanosine with a wide range of aryl bromides.