5689-65-6

Upstream product

• 3988-74-7 (E)-1-(furan-2-yl)-3-phenylprop-2-en-1-one 
• 1192-62-7 1-(2-furyl)-1-ethanone 
• 100-52-7 benzaldehyde 
• 5034-81-1 1-(furan-2-yl)ethanone O-acetyl oxime 
• 5007-50-1 1-(2-furyl)ethanone oxime 
• 103-82-2 phenylacetic acid 
• 18649-64-4 2-ethynylfuran 
• 100-46-9 benzylamine 
• 80927-46-4 1,5-Bis(2-furyl)-3-phenylpentan-1,5-dion 

Downstream Products

• 83463-12-1 4-phenyl-2,6-pyridinedicarboxylic acid 
• 939-23-1 p-phenylpyridine 

Relevant academic research and scientific papers

Synthesis of Kr?hnke pyridines through iron-catalyzed oxidative condensation/double alkynylation/amination cascade strategy

An efficient protocol for the synthesis of symmetrical and unsymmetrical 2,4,6-trisubstituted pyridines via oxidative cascade annulation of arylacetylenes with benzylamines has been developed. The reaction proceeds smoothly utilizing iron(II) triflate as a catalyst and molecular oxygen as an oxidant with broad substrate scope. Mechanistic studies reveal that the reaction may be experiences an oxidative condensation followed by double alkynylation and amination process.

Copper-catalyzed efficient access to 2,4,6-triphenyl pyridinesviaoxidative decarboxylative coupling of aryl acetic acids with oxime acetates

An efficient and concise approach for the synthesis of 2,4,6-triphenyl pyridines has been developed through copper-catalysed oxidative decarboxylative coupling of C(sp3) aryl acetic acids with oxime acetates in DMF at 150 °C under an oxygen atm

Synthesis of symmetrical pyridines by iron-catalyzed cyclization of ketoxime acetates and aldehydes

A novel and facile iron-catalyzed cyclization of ketoxime acetates and aldehydes for the green synthesis of substituted pyridines has been developed. In the presence of a FeCl3 catalyst, this reaction exhibited a good functional group tolerance to produce 2,4,6-triarylsubstituted symmetrical pyridines in high yields in the absence of any additive. A gram-scale reaction sequence was performed to demonstrate the scaled-up applicability of this synthetic method.

Metal-Free Synthesis of 2,4,6-Trisubstituted Pyridines via Iodine-Initiated Reaction of Methyl Aryl Ketones with Amines under Neat Heating

A neat heating protocol has been developed for metal-free synthesis of various 2,4,6-trisubstituted pyridines via iodine-initiated (in situ generated HI-catalyzed) condensation of methyl aryl ketones with amines and the following cyclization-aerobic oxidation. Large-scale synthesis and mechanistic investigation were also performed.

Copper-catalyzed formal C-N bond cleavage of aromatic methylamines: Assembly of pyridine derivatives

An efficient copper-catalyzed C-N bond cleavage of aromatic methylamines was developed to construct pyridine derivatives. With neat conditions and facile operation, the fragment-assembling strategy affords a broad range of 2,4,6-trisubstituted pyridines in up to 95% yield from simple and readily available starting materials. Interestingly, when pyridin-2-yl methylamine was employed as the substrate, α-alkylation reaction of ketones readily occurred to give β-(pyridin-2-yl) ketones instead of the 2,4,6-trisubstituted pyridines.

DPTA-catalyzed one-pot regioselective synthesis of polysubstituted pyridines and 1,4-dihydropyridines

With diphenylammonium triflate (DPAT) as a catalyst, the highly substituted pyridines and dihydropyridines were prepared under solvent-free conditions from aldehydes, ketones, and amines via a one-pot multi-component reaction. The advantages of this protocol include excellent yields, environmentally benign source of nitrogen, mild reaction conditions, and simple manipulation. Different source of nitrogen like urea, thiourea, inorganic ammonium salts, and organic amines were studied. In addition, a novel way was developed for the conversion of primary aliphatic amines into alcohols.

Substituted pyridine derivatives

It is disclosed that aryl-substituted 2,6-bis[N,N-di(carboxyalkyl)aminoalkyl] pyridines in which the aryl groups are substituted with one or more electron-releasing groups are an advantageous ligand for forming fluorescent chelates with rare earth metals. The pyridine moieties can be linked to target molecules, especially biologically active target molecules to provide fluorescent tagging for use in fluoroassay techniques. The pyridine moieties are disclosed as tetraacids, as salts and as esters. Preparation processes and precursors including the corresponding aryl-substituted 2,6-dicarboxypyridines as acids, salts and esters, are disclosed as well.