It has been found that a new and practical catalyst system of ruthenium-supported on alumina carries out copper-free Sonogashiracoupling reactions with high efficiency over a wide range of substrates under mild and convenient conditions.
ppm Pd-catalyzed, Cu-free Sonogashira couplings in water using commercially available catalyst precursors
作者:Bo Jin、Fabrice Gallou、John Reilly、Bruce H. Lipshutz
DOI:10.1039/c8sc05618h
日期:——
A newcatalyst that derives from commercially available precursors for copper-free, Pd-catalyzed Sonogashira reactions at the sustainable ppm level of precious metal palladium under mild aqueousmicellar conditions has been developed. Both the palladium pre-catalyst and ligand are commercially available, bench stable, and highly cost-effective. The catalyst is applicable to both aryl- and heteroaryl-bromides
Palladium-catalyzed Sonogashira coupling reactions in γ-valerolactone-based ionic liquids
作者:László Orha、József M Tukacs、László Kollár、László T Mika
DOI:10.3762/bjoc.15.284
日期:——
that the γ-valerolactone-based ionic liquid, tetrabutylphosphonium 4-ethoxyvalerate as a partially bio-based solvent can be utilized as alternative reaction medium for copper- and auxiliary base-free Pd-catalyzed Sonogashiracoupling reactions of aryl iodides and functionalized acetylenes under mild conditions. Twenty-two cross-coupling products were isolated with good to excellent yields (72-99%) and