774603-04-2Relevant academic research and scientific papers
Stereocontrolled synthesis of the PPAR-γ agonist 10-nitrolinoleic acid
Dunny, Elizabeth,Evans, Paul
supporting information; experimental part, p. 5334 - 5336 (2010/10/19)
(Figure presented) The naturally occurring PPAR-γ ligand 10-nitrooctadeca-9(E),12(Z)-dienoic acid (10-nitrolinoleic acid) (2a) was prepared as a single regio- and geometrical isomer in a practical eight-step, convergent sequence. The synthetic route featured a nitro aldol reaction between 9-oxononanoic acid methyl ester (3) and 1-nitronon-3(Z)-ene (4) in the key carbon-carbon bond forming step. The ability of 2a (and its methyl ester 9) to bind to PPAR-γ in a ligand-binding assay is reported.
Chemistry of nitrated lipids: Remarkable instability of 9-nitrolinoleic acid in neutral aqueous medium and a novel nitronitrate ester product by concurrent autoxidation/nitric oxide-release pathways
Manini, Paola,Capelli, Luigia,Reale, Samantha,Arzillo, Marianna,Crescenzi, Orlando,Napolitano, Alessandra,Barone, Vincenzo,D'Ischia, Marco
, p. 7517 - 7525 (2008/12/22)
(Chemical Equation Presented) Despite the mounting interest in nitrolinoleic acids and related nitrated polyunsaturated fatty acids as a novel class of bioactive signaling lipids, their chemistry and metabolic fate have remained poorly elucidated. Herein, we report an expedient nitroselenenylation/ oxidation route to 9-nitrolinoleic acid (1) and 10-nitrolinoleic acid (2), which enabled comparative product studies under physiologically relevant conditions. Under biomimetic conditions, 1 decayed at an unusually fast rate to give the hydroxy-, keto-, and nitronitrate ester derivatives 3, 4, and 5 as main products, identified by ESI-MS and 2D NMR spectroscopy, including 1H,15N HMBC experiments on the 15N-labeled derivatives. The 13-nitrato functionality in 5 suggested partitioning of 1 between concurrent peroxidation and nitric oxide (NO)-release pathways. Lipid 2 decayed at a much slower rate giving only the hydroxynitro derivative 6 as an isolable product. Diphenylpicrylhydrazide (DPPH) radical quenching experiments and DFT computations concurred to support a higher H-atom donating ability of 1 versus 2, due to more effective stabilization of the resulting pentadienyl radical by the terminal nitro group. The markedly different stability of isomeric nitrolinoleic acids disclosed in the present study may provide an explanation for the previous identification of 2, but not 1, in body fluids and offers a key for future insights into the biological activities of nitrated lipids.
