Origin of the Regio- and Stereoselectivity in Palladium-Catalyzed Electrophilic Substitution via Bis(allyl)palladium Complexes.

ChemInform ◽  
2003 ◽  
Vol 34 (51) ◽  
Author(s):  
Olov A. Wallner ◽  
Kalman J. Szabo
Keyword(s):  
Electrophilic Substitution ◽  
Palladium Complexes ◽  
Palladium Catalyzed

Synthesis and Solid State and Solution Characterization of Mono- and Di-(η1-C) Carbamoyl−Palladium Complexes. New Efficient Palladium-Catalyzed Routes to Carbamoyl Chlorides:  Key Intermediates to Isocyanates, Carbamic Esters, and Ureas

2000 ◽  
Vol 19 (19) ◽  
pp. 3879-3889 ◽  
Author(s):  
Michele Aresta ◽  
Potenzo Giannoccaro ◽  
Immacolata Tommasi ◽  
Angela Dibenedetto ◽  
Anna Maria Manotti Lanfredi ◽  
...  
Keyword(s):  
Solid State ◽  
Palladium Complexes ◽  
Palladium Catalyzed ◽  
Carbamic Esters

scholarly journals Friedel–Crafts-Type Alkylation of Indoles in Water Using Amphiphilic Resin-Supported 1,10-Phenanthroline–Palladium Complex under Aerobic Conditions

Catalysts ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 193
Author(s):  
Toshimasa Suzuka ◽  
Yuto Ooshiro ◽  
Kazuhito Ogihara
Keyword(s):  
High Selectivity ◽  
Palladium Complex ◽  
Palladium Complexes ◽  
High Yield ◽  
Alkylation Reaction ◽  
Poly Ethylene Glycol ◽  
Aerobic Conditions ◽  
Palladium Catalyzed ◽  
Poly Ethylene ◽  
Polymeric Catalyst

The palladium-catalyzed Friedel-Crafts-type alkylation of indoles in water has been achieved using amphiphilic polystyrene-poly(ethylene glycol) (PS-PEG) resin-supported phenanthroline-palladium complexes in water under aerobic conditions, affording the corresponding products with good-to-high yield. The polymeric catalyst was also found to promote the C3-alkylation reaction to give a thermodynamic alkylation product with high selectivity. The polymeric catalyst was recovered and reused several times without any loss of catalytic activity.

Palladium-catalyzed cross-addition of triisopropylsilylacetylene to unactivated alkynes

2008 ◽  
Vol 80 (5) ◽  
pp. 1161-1166 ◽  
Author(s):  
Naofumi Tsukada ◽  
Satoshi Ninomiya ◽  
Yoshimi Aoyama ◽  
Yoshio Inoue
Keyword(s):  
Palladium Catalysts ◽  
Palladium Complexes ◽  
Addition Reactions ◽  
Bidentate Ligands ◽  
Multidentate Ligand ◽  
Palladium Catalyzed

Selective cross-addition of triisopropylsilylacetylene (TIPSA) to unactivated alkynes is catalyzed by dinuclear and mononuclear palladium complexes supported by a multidentate ligand, N,N'-bis[2-(diphenylphosphino)phenyl]formamidine (dpfamH). While the addition reactions of TIPSA to dialkylacetylenes using palladium catalysts supported by monodentate and bidentate ligands gives dimers of TIPSA as major products, the reactions with the palladium complexes supported by dpfam affords cross-adducts selectively, in which the yields of TIPSA dimers are less than 5 %. The addition of TIPSA to monoalkylacetylenes also gives cross-adducts as major products, although the selectivity and yield are moderate.

C(sp3)-H Activation Enabled by (η3-Indolylmethyl)palladium Complexes: Synthesis of Monosubstituted Tetrahydrocarbazoles

Synthesis ◽  
2021 ◽  
Author(s):  
Ketan Kumar ◽  
Thavaraj Vivekanand ◽  
Bara Singh ◽  
S. S. V. Ramasastry
Keyword(s):  
Palladium Complexes ◽  
Mechanistic Studies ◽  
Synthetic Utility ◽  
Palladium Catalyzed

The synthesis of monosubstituted tetrahydrocarbazoles is achieved via the palladium-catalyzed formal [4+2]-cycloaddition of 2-alkyl-3-indolylmethyl carbonates and monosubstituted olefins. The transformation demonstrates an unusual C(sp3)-H activation enabled by (η3-indolylmethyl)palladium complexes. The regioselectivity is found to be dependent on the nature of the substituent across the olefin component. Elaborate mechanistic studies are performed, and the synthetic utility of the products is also demonstrated.

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