Hydroxylated terphenylphosphine ligands for palladium-catalyzed ortho-selective cross-coupling of dibromophenols, dibromoanilines, and their congeners with Grignard reagents
摘要:
p-Terphenylphosphines bearing one or two hydroxy groups were used as ligands to palladium in the cross-coupling of dibromophenols, dibromoanilines, and their congeners with Grignard reagents. High ortho-selectivity that cannot be achieved using other phosphine ligands was observed. ortho-Preference was also observed in competitive cross-coupling reactions of two substrates. A significant effect of the concentration of the Grignard reagent on the ortho-selectivity was observed, when the hydroxylated terphenylphosphines were used. Kinetic studies on this effect showed that high concentrations of the Grignard reagent retard the cross-coupling reaction only at the para-position, but not at the ortho-position. (C) 2011 Elsevier Ltd. All rights reserved.
[EN] MODULATORS OF CYSTIC FIBROSIS TRANSMEMBRANE CONDUCTANCE REGULATOR<br/>[FR] MODULATEURS DU RÉGULATEUR DE LA CONDUCTANCE TRANSMEMBRANAIRE DE LA MUCOVISCIDOSE
申请人:VERTEX PHARMA
公开号:WO2022076627A1
公开(公告)日:2022-04-14
This disclosure provides modulators of Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) having the core structure:, pharmaceutical compositions containing at least one such modulator, methods of treating CFTR mediated diseases, including cystic fibrosis using such modulators and pharmaceutical compositions, combination therapies and combination pharmaceuticals employing those modulators, and processes and intermediates for making such modulators.