Rhenium-Catalyzed Regioselective Synthesis of Multisubstituted Pyridines from β-Enamino Ketones and Alkynes via C–C Bond Cleavage
摘要:
A new method is described for the regioselective synthesis of multisubstituted pyridine derivatives. Treatment of N-acetyl beta-enamino ketones with alkynes in the presence of the rhenium catalyst, Re-2(CO)(10), gives multisubstituted pyridines regioselectively. In this reaction, the N-acetyl moieties are important for the selective formation of the multisubstituted pyridines. This reaction proceeds via insertion of alkynes into a carbon carbon single bond of beta-enamino ketones, intramolecular nucleophilic cyclization, and elimination of acetic acid.
[EN] COMPOSITION OF MATTER FOR USE IN ORGANIC LIGHT-EMITTING DIODES<br/>[FR] COMPOSITION DE MATIÈRE DESTINÉE À ÊTRE UTILISÉE DANS DES DIODES ÉLECTROLUMINESCENTES ORGANIQUES
申请人:KYULUX INC
公开号:WO2019046734A1
公开(公告)日:2019-03-07
The present disclosure relates to compounds of Formula (I)-(V) as compounds capable of emitting delayed fluorescence and uses of these compounds in organic light-emitting diodes.