A Ligand Free and Room Temperature Protocol for Pd-Catalyzed Kumada−Corriu Couplings of Unactivated Alkenyl Phosphates
摘要:
Kumada-Corriu cross-couplings of nonactivated cyclic and acyclic vinyl phosphates with aryl magnesium reagents afforded a series of 1,1-disubtituted alkenes in good yields for most cases when the reactions were performed at room temperature with the simple palladium salt, PdCl2, without the presence of phosphine ligands.
A Ligand Free and Room Temperature Protocol for Pd-Catalyzed Kumada−Corriu Couplings of Unactivated Alkenyl Phosphates
作者:Delphine Gauthier、Stephan Beckendorf、Thomas M. Gøgsig、Anders T. Lindhardt、Troels Skrydstrup
DOI:10.1021/jo900098a
日期:2009.5.1
Kumada-Corriu cross-couplings of nonactivated cyclic and acyclic vinyl phosphates with aryl magnesium reagents afforded a series of 1,1-disubtituted alkenes in good yields for most cases when the reactions were performed at room temperature with the simple palladium salt, PdCl2, without the presence of phosphine ligands.
Visible-Light-Promoted Decarboxylative Alkylation/Cyclization of Vinylcycloalkanes
visible-light-promoted decarboxylativealkylation of vinylcyclopropanes with alkyl N-(acyloxy)phthalimide esters through the dual C–C bond and single N–O bond cleavage, employing triphenylphosphine and lithium iodide as the photoredox system to synthesize 2-alkylated 3,4-dihydronaphthalenes, has been established. This alkylation/cyclization involves a radical process and undergoes a sequence of N-(acyloxy)phthalimide