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Heck Reaction Catalyzed (heck + reaction_catalyze)
Selected AbstractsAcrolein Diethyl Acetal: A Three-Carbon Homologating Reagent for the Synthesis of ,-Arylpropanoates and Cinnamaldehydes by Heck Reaction Catalyzed by a Kaiser Oxime Resin Derived PalladacycleEUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 18 2008Emilio 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] ChemInform Abstract: Heck Reaction Catalyzed by Mesoporous SBA-15-Supported Ionic Liquid,Pd(OAc)2.CHEMINFORM, Issue 20 2009Ji-Young Jung 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] A Novel Heck Reaction Catalyzed by Co Hollow Nanospheres in Ligand-Free Condition.CHEMINFORM, Issue 33 2007Ping 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] Heck Reaction Catalyzed by Palladacycle in Neat Water,CHINESE JOURNAL OF CHEMISTRY, Issue 7 2003Jian-Jun Hou Abstract Cyclopalladated ferrocenylimine has been found to be a type of excellent phosphine-free catalyst for Heck reactions in neat water with both higher yields and turnover numbers than those reported in the literature up to now. Some commercial emulsifying agents, including the commonly used quaternary ammonium salts, have been proved to be excellent additives in the catalysis of the reactions. Not only aromatic iodide, but also aromatic bromide could be coupled with the olefins. All reactions were able to be conducted in air under refluxing condition. [source] Efficient Heck Reactions Catalyzed by a Highly Recyclable Palladium(II) Complex of a Pyridyl-Functionalized Imidazolium-Based Ionic liquid.CHEMINFORM, Issue 25 2007Ruihu Wang 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] Heck Reactions Catalyzed by Palladium Complex Supported on 4-Aminopyridine ResinCHINESE JOURNAL OF CHEMISTRY, Issue 5 2009Xiangmei WU Abstract 4-Aminopyridine resin-immobilized palladium catalyst was prepared by a simple procedure, which exhibited excellent activity at low loading levels for the phosphine-free Heck vinylation of activated and non-activated aryl or heteroaryl substrates with olefins in air. This method has the advantage of environmental benignity, generality, simplicity and potential for recycling of the resin catalyst. [source] | ||||||||||