Two-Directional Approach for the Rapid Synthesis of 2,4-Bis-Aminoaryl Pyridine Derivatives was written by Morgentin, Remy;Barlaam, Bernard;Foote, Kevin;Hassall, Lorraine;Hawkins, Janet;Jones, Clifford D.;Le Griffon, Antoine;Peru, Aurelien;Ple, Patrick. And the article was included in Synthetic Communications in 2012.Category: iodides-buliding-blocks This article mentions the following:
We have developed two different approaches in parallel to rapidly access 2,4-bis(aminoaryl)pyridine compounds, e.g., I, from a common starting material. The C-4/C-2 approach uses palladium-mediated coupling reactions to sequentially functionalize C-4 and then C-2. An alternative C-2/C-4 route uses a regioselective SNAr reaction to first substitute at C-2 then subsequently at C-4 by a palladium-mediated reaction. Both approaches have been used successfully to provide a range of 2,4-bis(aminoaryl)pyridine compounds In the experiment, the researchers used many compounds, for example, 2-Chloro-5-(trifluoromethyl)-4-iodopyridine (cas: 505084-55-9Category: iodides-buliding-blocks).
2-Chloro-5-(trifluoromethyl)-4-iodopyridine (cas: 505084-55-9) belongs to iodide derivatives. Generally organic iodides can be divided into two classes of alkyl iodides and aryl iodides. Typical reactions of alkyl iodides include nucleophilic substitution, elimination, reduction, and the formation of organometallics. The C–I bond is the weakest of the carbon–halogen bonds. These bond strengths correlate with the electronegativity of the halogen, decreasing in the order F > Cl > Br > I. This periodic order also follows the atomic radius of halogens and the length of the carbon-halogen bond.Category: iodides-buliding-blocks
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com