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Sonogashira reaction ligand activity

Cationic phosphine ligands containing guanidiniumphenyl moieties were originally developed in order to make use of their pronounced solubility in water [72, 73]. They were shown to form active catalytic systems in Pd-mediated C-C coupling reactions between aryl iodides and alkynes (Castro-Stephens-Sonogashira reaction) [72, 74] and Rh-catalyzed hydroformylation of olefins in aqueous two-phase systems [75]. [Pg.237]

Through a survey of a number of Pd/ligand combinations, Pd/NHC-based systems were found to possess the desired activity. Interestingly, organic bases such as NEt3, which are commonly used in Sonogashira reactions of aryl electrophiles, were ineffective under the conditions described in Eq. 14. [Pg.101]

Table 9.2 Highly active phosphine ligands in the Sonogashira reaction. Table 9.2 Highly active phosphine ligands in the Sonogashira reaction.
See other pages where Sonogashira reaction ligand activity is mentioned: [Pg.337]    [Pg.194]    [Pg.179]    [Pg.239]    [Pg.574]    [Pg.46]    [Pg.50]    [Pg.53]    [Pg.159]    [Pg.59]    [Pg.223]    [Pg.581]    [Pg.49]    [Pg.89]    [Pg.90]    [Pg.49]    [Pg.89]    [Pg.90]    [Pg.336]    [Pg.203]    [Pg.89]    [Pg.192]    [Pg.194]    [Pg.197]    [Pg.214]    [Pg.668]    [Pg.669]    [Pg.674]    [Pg.676]    [Pg.61]    [Pg.37]    [Pg.46]    [Pg.80]    [Pg.242]    [Pg.90]    [Pg.238]    [Pg.376]    [Pg.234]    [Pg.322]    [Pg.74]   
See also in sourсe #XX -- [ Pg.123 , Pg.124 ]



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Active Ligands

Ligand activated

Sonogashira coupling reaction ligand activity

Sonogashira reaction

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