79574-76-8Relevant academic research and scientific papers
Improved Synthesis of 2,3-Disubstituted Pyridines by Metallation of 2-Chloropyridine: a Convenient Route to Fused Polyheterocycles
Trecourt, Francois,Marsais, Francis,Guengoer, Timur,Queguiner, Guy
, p. 2409 - 2415 (2007/10/02)
Chemoselective directed metallation of 2-chloropyridine allows the synthesis of 2-substituted 3-carbonylated pyridines, advantage being taken of the metallation ortho-directing effect of the halogen, as well as its reactivity towards nucleophiles.Thus (2-chloro-, 2-methoxy-, and 2-amino-3-pyridyl)-ethanones and -arylmethanones as well as carbaldehydes have been prepared.Some of these ortho-disubstituted intermediates have been readily cyclized to fused polyheterocycles such as naphthiridines and aza-analoges of coumarins, xanthones, and acridones.
METALLATION REGIOSELECTIVE EN SERIE PYRIDINIQUE: SYNTHESE ORIGINALE D'AMINO-2-AROYL 3-PYRIDINES
Guengoer, Timur,Marsais, Francis,Queguiner, Guy
, p. 139 - 150 (2007/10/02)
Lithium diisopropylamide reacts with 2-fluoropyridine at low temperature: regioselectivity is excellent and metallation occurs without side reactions such as nucleophilic attack. 2-Fluoro-3-lithiopyridine is formed and with aldehydes it gives the correspo
