Stereocontrolled Syntheses of All Four Stereoisomeric 1,N2-Deoxyguanosine Adducts of the Lipid Peroxidation Product trans-4-Hydroxynonenal
摘要:
[GRAPHICS]trans-4-Hydroxynonenal (4-HNE) is a unique product from the peroxidation of omega -6 polyunsaturated fatty acids. The major reaction of racemic 4-HNE with DNA is with deoxyguanosine to give four stereoisomeric exocyclic propano adducts. The stereospecific syntheses of these four adducts has been achieved at the nucleoside level. The synthetic approach is amenable to the synthesis of structurally defined oilgonucleotides containing these endogenous genotoxins.
Simplified synthesis of individual stereoisomers of the 4-hydroxynonenal adducts of deoxyguanosine
作者:Plamen P. Christov、Edward K. Hawkins、Nathan R. Kett、Carmelo J. Rizzo
DOI:10.1016/j.tetlet.2013.06.004
日期:2013.8
We previously reported the synthesis of the 1,N-2-deoxyguanosine adducts of 4-hydroxynonenal, an important product of lipid peroxidation, which involved the nucleophilic aromatic substitution reaction of O-6-protected-2-fluoroinosine with 4-amino-1,2,5-trihydroxydecanal followed by periodate oxidation of the vicinal diol.(6) An improved synthesis of the amino triols has been developed. The syn and anti diastereomers of a key intermediate, 4-nitro-5-hydroxy-1-decene, were synthesized by a Henry reaction and separated; each diastereomer was further separated into individual enantiomers by chiral supercritical fluid chromatography. Of note, dihydroxylation of the terminal olefin under conventional conditions with catalytic OsO4 and a tertiary amine oxide as the stoichiometric oxidant led to scrambling of stereochemistry of the nitro group. The scrambling was not observed when t-butylhydroperoxide was used as the oxidant. (C) 2013 Elsevier Ltd. All rights reserved.
Site-Specific Synthesis and Reactivity of Oligonucleotides Containing Stereochemically Defined 1,<i>N</i><sup>2</sup>-Deoxyguanosine Adducts of the Lipid Peroxidation Product <i>trans</i>-4-Hydroxynonenal
作者:Hao Wang、Ivan D. Kozekov、Thomas M. Harris、Carmelo J. Rizzo
DOI:10.1021/ja0288800
日期:2003.5.1
is a major peroxidation product of omega-6 polyunsaturated fatty acids. The reaction of HNE with DNA gives fourdiastereomeric 1,N(2)-gamma-hydroxypropano adducts of deoxyguanosine; background levels of these adducts have been detected in animal tissue. Stereospecificsyntheses of these four adducts at the nucleoside level have been accomplished. In addition, a versatile strategy for their site-specific
Stereocontrolled Syntheses of All Four Stereoisomeric 1,<i>N</i><sup>2</sup>-Deoxyguanosine Adducts of the Lipid Peroxidation Product <i>trans</i>-4-Hydroxynonenal
作者:Hao Wang、Carmelo J. Rizzo
DOI:10.1021/ol016810c
日期:2001.11.1
[GRAPHICS]trans-4-Hydroxynonenal (4-HNE) is a unique product from the peroxidation of omega -6 polyunsaturated fatty acids. The major reaction of racemic 4-HNE with DNA is with deoxyguanosine to give four stereoisomeric exocyclic propano adducts. The stereospecific syntheses of these four adducts has been achieved at the nucleoside level. The synthetic approach is amenable to the synthesis of structurally defined oilgonucleotides containing these endogenous genotoxins.