Results 61 to 70 of about 327,777 (207)

Catch and release’ cascades: a resin-mediated three-component cascade approach to small molecules [PDF]

open access: yes, 2006
The application of a ‘catch and release’ approach to palladium-catalysed multi-component cascade reactions leads to diverse libraries of pharmacologically interesting small molecules in high yield and with excellent ...
Andrew Cook   +23 more
core   +1 more source

O-Carboxymethyl Chitosan Supported Heterogeneous Palladium and Ni Catalysts for Heck Reaction

open access: yesMolecules, 2017
Two polymer catalysts (Pd-OCMCS and Ni-OCMCS) with good reusability were synthesized by coordinating Pd and Ni onto O-carboxymethyl chitosan (OCMCS). The chemical structure and thermal stability of prepared catalysts were determined by Fourier transform ...
Dongjun Lv, Mingjie Zhang
doaj   +1 more source

Substituted 1,1,1-triaryl-2,2,2-trifluoroethanes and processes for their synthesis [PDF]

open access: yes, 1988
Synthetic procedures are disclosed for tetraalkyls, tetraacids, and dianhydrides substituted 1,1,1-triaryl 2,2,2-trifluoroethanes which comprises: (1) 1,1-bis (dialkylaryl) 1-aryl 2,2,2-trifluoroethane, (2) 1,1-bis (dicarboxyaryl) 1-aryl 2,2,2 ...
Alston, William B., Gratz, Roy F.
core   +2 more sources

Computational study of the hydrodefluorination of fluoroarenes at [Ru(NHC)(PR3)2(CO)(H)2]: predicted scope and regioselectivities [PDF]

open access: yes, 2013
Density functional theory calculations have been employed to investigate the scope and selectivity of the hydrodefluorination (HDF) of fluoroarenes, C6F6-nHn (n = 0-5), at catalysts of the type [Ru(NHC)(PR3)(2)(CO)(H)(2)].
Macgregor, Stuart Alan   +3 more
core   +1 more source

Ferrocenyl-aryl-plumbane / Ferrocenyl-aryl-plumbanes

open access: yesZeitschrift für Naturforschung B, 1990
The first example of a diplumba[1.1]ferrocenophane[cpPb(ø2)cp]2Fe2 has been prepared from ø2PbCl2 and 1,1′-dilithioferrocene 2 TMEDA. The preparation of further four ferrocenyl-phenyl-plumbanes, including the hitherto unknown compounds (ø3Pbcp)2Fe, Fc2Pb2ø2 and [(ø3Pb)cpFecp]FcPbø2 has been achieved by reaction of a mixture of monolithioferrocene ...
Gerhard Utri   +2 more
openaire   +1 more source

Pd‐Catalyzed Thiotritylation Cross‐Coupling of Aryl Bromides and Iodides to Access Sulfur Functional Groups

open access: yesChemistryEurope
Sulfur‐containing functional groups (SFGs) are increasingly important for modern medicinal chemistry and their large structural diversity provides many opportunities for lead optimization.
Yue Liu   +3 more
doaj   +1 more source

A sequential direct arylation/Suzuki-Miyaura cross-coupling transformation of unprotected 2 '-deoxyadenosine affords a novel class of fluorescent analogues [PDF]

open access: yes, 2010
Novel rigid 8-biaryl-2'-deoxyadenosines with tuneable fluorescent properties can be accessed by an efficient sequential catalytic Pd-0-coupling ...
Baumann, C.G.   +3 more
core   +1 more source

Boron Arylations of Subporphyrins with Aryl Zinc Reagents [PDF]

open access: yesChemistry – A European Journal, 2016
AbstractBoron arylations of B‐(methoxo)triphenylsubporphyrin have been developed with a combined use of ArZnI⋅LiCl and trimethylsilyl chloride. Aryl zinc reagents bearing bromo, cyano, amide, and ester groups can be employed for the B‐arylation reaction to provide the corresponding B‐arylated subporphyrins in moderate yields.
Kotani, Ryota   +3 more
openaire   +3 more sources

A New Alkylation of Aryl Alcohols by Boron Trifluoride Etherate

open access: yesMolecules, 2019
The ethylation of aryl alcohols by an ethyl moiety of boron trifluoride etherate is described. The reaction proceeded cleanly and afforded good yields of the corresponding aryl ethyl ethers.
Ndze Denis Jumbam   +5 more
doaj   +1 more source

Amine, Amido, and Imido Complexes of Tantalum Supported by a Pyridine-Linked Bis(phenolate) Pincer Ligand: Ta−N π-Bonding Influences Pincer Ligand Geometry [PDF]

open access: yes, 2009
A series of tantalum imido and amido complexes supported by a pyridine-linked bis(phenolate) ligand has been synthesized. Characterization of these complexes via X-ray crystallography reveals both C_s and C_2 binding modes of the bis(phenolate)pyridine ...
Bercaw, John E.   +3 more
core   +2 more sources

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