10128-71-9Relevant articles and documents
Quinolinium dichromate oxidation of heterocyclic carboxylic acids
Suante, Hauzachin,Mahanti, Mahendra K.
, p. 489 - 492 (2003)
Heterocyclic carboxylic acids were oxidized to the corresponding hydroxy-substituted acids by quinolinium dichromate in sulfuric acid, in 50% (v/v) acetic acid-water as solvent. The kinetic results supported a mechanistic pathway proceeding via a rate-determining decomposition of the chromate ester.
A tautomeric ligand enables directed C-H hydroxylation with molecular oxygen
Li, Zhen,Wang, Zhen,Chekshin, Nikita,Qian, Shaoqun,Qiao, Jennifer X.,Cheng, Peter T.,Yeung, Kap-Sun,Ewing, William R.,Yu, Jin-Quan
, p. 1452 - 1457 (2021/06/30)
Hydroxylation of aryl carbon-hydrogen bonds with transition metal catalysts has proven challenging when oxygen is used as the oxidant. Here, we report a palladium complex bearing a bidentate pyridine/ pyridone ligand that efficiently catalyzes this reaction at ring positions adjacent to carboxylic acids. Infrared, x-ray, and computational analysis support a possible role of ligand tautomerization from monoanionic (L,X) to neutral (L,L) coordination in the catalytic cycle of aerobic carbon-hydrogen hydroxylation reaction. The conventional site selectivity dictated by heterocycles is overturned by this catalyst, thus allowing late-stage modification of compounds of pharmaceutical interest at previously inaccessible sites.
Inhibition of the histone demethylase JMJD2E by 3-substituted pyridine 2,4-dicarboxylates
Thalhammer, Armin,Mecinovic, Jasmin,Loenarz, Christoph,Tumber, Anthony,Rose, Nathan R.,Heightman, Tom D.,Schofield, Christopher J.
body text, p. 127 - 135 (2011/02/24)
Based on structural analysis of the human 2-oxoglutarate (2OG) dependent JMJD2 histone Nε-methyl lysyl demethylase family, 3-substituted pyridine 2,4-dicarboxylic acids were identified as potential inhibitors with possible selectivity over other human 2OG oxygenases. Microwave-assisted palladium-catalysed cross coupling methodology was developed to install a diverse set of substituents on the sterically demanding C-3 position of a pyridine 2,4-dicarboxylate scaffold. The subsequently prepared di-acids were tested for in vitro inhibition of the histone demethylase JMJD2E and another human 2OG oxygenase, prolyl-hydroxylase domain isoform 2 (PHD2, EGLN1). A subset of substitution patterns yielded inhibitors with selectivity for JMJD2E over PHD2, demonstrating that structure-based inhibitor design can enable selective inhibition of histone demethylases over related human 2OG oxygenases.
