Palladium-catalyzed site-selective arylation of symmetric dichlorobenzaldehyde to non-symmetric diaryl benzaldehyde via Suzuki coupling
摘要:
Arylation of 2,6-dichlorobenzaldehyde by aryl boronic acids via site-selective Suzuki coupling catalyzed by PdCl2 supported on 4 A molecular sieves produces 2-aryl-6-chlorobenzaldehyde which on subsequent coupling with a different aryl boronic acid in the presence of Pd(OAc)(2)-NHC ligand leads to non-symmetric diaryl benzaldehyde in good overall yield. (C) 2012 Elsevier Ltd. All rights reserved.
Molecular sieves-supported palladium(II) catalyst: Suzuki coupling of chloroarenes and an easy access to useful intermediates for the synthesis of irbesartan, losartan and boscalid
作者:Raju Dey、Bojja Sreedhar、Brindaban C. Ranu
DOI:10.1016/j.tet.2010.02.011
日期:2010.3
prepared in one step following this reaction. The preparation of this catalyst is very simple. The FE-SEM image shows a cube shape ordered structure. The catalyst does not exhibit any nanoparticles as indicated by TEM. EDS and XPS demonstrate anchoring of Pd on molecular sieves in +2 oxidation state. This heterogeneous catalyst is stable, non-air sensitive and recyclable.
Palladium-catalyzed site-selective arylation of symmetric dichlorobenzaldehyde to non-symmetric diaryl benzaldehyde via Suzuki coupling
作者:Raju Dey、Brindaban C. Ranu
DOI:10.1016/j.tetlet.2012.01.014
日期:2012.3
Arylation of 2,6-dichlorobenzaldehyde by aryl boronic acids via site-selective Suzuki coupling catalyzed by PdCl2 supported on 4 A molecular sieves produces 2-aryl-6-chlorobenzaldehyde which on subsequent coupling with a different aryl boronic acid in the presence of Pd(OAc)(2)-NHC ligand leads to non-symmetric diaryl benzaldehyde in good overall yield. (C) 2012 Elsevier Ltd. All rights reserved.