77801-60-6Relevant articles and documents
Design of New Ligands for the Palladium-Catalyzed Arylation of α-Branched Secondary Amines
Park, Nathaniel H.,Vinogradova, Ekaterina V.,Surry, David S.,Buchwald, Stephen L.
supporting information, p. 8259 - 8262 (2015/07/07)
In Pd-catalyzed C-N cross-coupling reactions, α-branched secondary amines are difficult coupling partners and the desired products are often produced in low yields. In order to provide a robust method for accessing N-aryl α-branched tertiary amines, new catalysts have been designed to suppress undesired side reactions often encountered when these amine nucleophiles are used. These advances enabled the arylation of a wide array of sterically encumbered amines, highlighting the importance of rational ligand design in facilitating challenging Pd-catalyzed cross-coupling reactions.
Synthesis of tetracyclic indoles via intramolecular α-arylation of ketones
Hellal, Malik,Singh, Shambhavi,Cuny, Gregory D.
experimental part, p. 4123 - 4130 (2012/06/17)
Figure Persented: An intramolecular palladium(0)-mediated α-arylation of ketones applied to the synthesis of various substituted tetracyclic indoles is reported. Most significantly, the efficiency of the transformation was enhanced by the use of monoligated Pd(0) complexes. This methodology was extended to double α-arylation of ketones using one-pot reactions with either simultaneous addition or sequential addition of two aryl halides for producing aryl substituted tetracyclic indoles.
Enantioselective indole Friedel-Crafts alkylations catalyzed by bis(oxazolinyl)pyridine-scandium(III) triflate complexes
Evans, David A.,Scheidt, Karl A.,Fandrick, Keith R.,Lam, Hon Wai,Wu, Jimmy
, p. 10780 - 10781 (2007/10/03)
A highly enantioselective Friedel-Crafts alkylation of electron-rich aromatic nucleophiles catalyzed by scandium(III) triflate-pyridyl(bis)oxazoline complexes has been accomplished. The reaction involves α,β-unsaturated acyl phosphonates as electrophiles and primarily substituted indoles as nucleophiles. The reactive acyl phosphonate product is converted to the corresponding ester or amide in good overall yield by adding an alcohol or amine directly to the reaction mixture. Copyright