Ligand-Free Conditions (ligand-free + condition)

Distribution by Scientific Domains


Selected Abstracts


A Novel Heck Reaction Catalyzed by Co Hollow Nanospheres in Ligand-Free Condition.

CHEMINFORM, Issue 33 2007
Ping Zhou
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]


ChemInform Abstract: Recyclable Iron/Graphite Catalyst for C,S Cross Coupling of Thiols with Aryl Halides under Ligand-Free Conditions.

CHEMINFORM, Issue 37 2010
Vijay Kumar Akkilagunta
Abstract The novel heterogeneous iron catalyst is highly efficient for a broad spectrum of iodides and thiols and can be recycled up to 7 times without loss of activity. [source]


ChemInform Abstract: Generally Applicable and Efficient Oxidative Heck Reaction of Arylboronic Acids with Olefins Catalyzed by Cyclopalladated Ferrocenylimine under Base- and Ligand-Free Conditions.

CHEMINFORM, Issue 24 2010
Yuting Leng
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


ChemInform Abstract: Nano-Iron Oxide as a Recyclable Catalyst for Intramolecular C,N Cross-Coupling Reactions under Ligand-Free Conditions: One-Pot Synthesis of 1,4-Dihydroquinoline Derivatives.

CHEMINFORM, Issue 17 2010
Xiao-Jin Wu
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


ChemInform Abstract: Aqueous Sodium Hydroxide Promoted Cross-Coupling Reactions of Alkenyltrialkoxysilanes under Ligand-Free Conditions.

CHEMINFORM, Issue 30 2008
Emilio Alacid
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


ChemInform Abstract: Synthesis of Phthalides via Pd/CNTs-Catalyzed Reaction of Terminal Alkynes and o-Iodobenzoic Acid under Copper- and Ligand-Free Conditions.

CHEMINFORM, Issue 11 2008
Lei Zhou
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


ChemInform Abstract: Consecutive Palladium-Catalyzed Hiyama,Heck Reactions in Aqueous Media under Ligand-Free Conditions.

CHEMINFORM, Issue 6 2008
Alvaro Gordillo
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


Acrolein Diethyl Acetal: A Three-Carbon Homologating Reagent for the Synthesis of ,-Arylpropanoates and Cinnamaldehydes by Heck Reaction Catalyzed by a Kaiser Oxime Resin Derived Palladacycle

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 18 2008
Emilio Alacid
Abstract A polymer palladacycle derived from Kaiser oxime resin was used as a source of palladium(0) in the chemoselective Heck reaction of acrolein diethyl acetal with aryl halides under ligand-free conditions. The use of typical Heck conditions afforded 3-arylpropionic esters, and the process can be directed to the synthesis of cinnamaldehydes under Cacchi conditions. These processes take place with rather low loading of the catalyst, which can be recovered by simple filtration and reused for at least five runs without competitive dehalogenation. This is the first time that a supported palladium complex has been reused under Cacchi conditions. ICP-OES analyses of the Pd content of the crude products in both transformations indicated lower leaching for the esters than for the aldehydes in the range up to 0.08 ppm for the esters and 0.8 ppm for the aldehydes.( Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008) [source]


Recyclable Heterogeneous Supported Copper-Catalyzed Coupling of Thiols with Aryl Halides: Base-Controlled Differential Arylthiolation of Bromoiodobenzenes

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 14-15 2009
Sukalyan Bhadra
Abstract Alumina-supported copper sulfate efficiently catalyzes the S -arylation of aromatic, heteroaromatic and aliphatic thiols with aryl as well as heteroaryl halides under aerobic, ligand-free conditions. This protocol provides an easy access to a variety of thioethers as well as unsymmetrical bis-thioethers by base-controlled differential coupling of thiols with iodo- and bromo-substituents in an aromatic halide. The catalyst is inexpensive, non-air sensitive, environmentally friendly and recyclable. [source]