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Palladium-Catalyzed Cross-Coupling Reactions (Palladium-Catalyze + cross-coupl_reaction)
Selected AbstractsStereoselective Preparation of (E)- and (Z)-,-Fluorostilbenes via Palladium-Catalyzed Cross-Coupling Reaction of High E/Z Ratio and (Z)-1-Bromo-1-fluoroalkenes.CHEMINFORM, Issue 40 2006Jianjun Xu 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] A Facile Stereoselective Synthesis of (Z,E)-2-Silyl-Substituted 1,3-Dienes via Palladium-Catalyzed Cross-Coupling Reaction.CHEMINFORM, Issue 8 2006Ming-Zhong Cai Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access the actual ChemInform Abstract, please click on HTML or PDF. [source] Palladium-Catalyzed Cross-Coupling Reaction of Alkynylzincs with Benzylic Electrophiles.CHEMINFORM, Issue 31 2005Mingxing Qian Abstract For Abstract see ChemInform Abstract in Full Text. [source] Palladium-Catalyzed Cross-Coupling Reaction of Organobismuth Compounds with Aryl and Alkenyl Chlorides.CHEMINFORM, Issue 3 2005Osamu Yamazaki Abstract For Abstract see ChemInform Abstract in Full Text. [source] Palladium-Catalyzed Cross-Coupling Reaction of Potassium Diaryldifluoroborates with Aryl Halides.CHEMINFORM, Issue 49 2003Takatoshi Ito Abstract For Abstract see ChemInform Abstract in Full Text. [source] Palladium-Catalyzed Cross-Coupling Reaction of Allyl Acetates with Pinacol Aryl- and Vinylboronates.CHEMINFORM, Issue 37 2003Giorgio Ortar Abstract For Abstract see ChemInform Abstract in Full Text. [source] Palladium-Catalyzed Cross-Coupling Reaction of Anilinium Hypophosphite with Alkenyl Bromides and Triflates: Application to the Synthesis of GABA Analogues.CHEMINFORM, Issue 42 2002Yves R. Dumond No abstract is available for this article. [source] Synthesis of Cross-Conjugated Geminal Enediynes via Palladium-Catalyzed Cross-Coupling Reaction of Ketene Butyltelluroacetals.CHEMINFORM, Issue 38 2002Gilson Zeni Abstract For Abstract see ChemInform Abstract in Full Text. [source] ChemInform Abstract: Stereospecific Preparation of (Z)-,-Fluorostilbenes via a Kinetically Controlled Palladium-Catalyzed Cross-Coupling Reaction of High E/Z Ratio 1-Bromo-1-fluorostyrenes and Aryl Stannanes.CHEMINFORM, Issue 28 2002Jianjun Xu 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: Stereospecific Formation of Enynephosphonates via Palladium-Catalyzed Cross-Coupling Reaction of ,-Organotelluro Vinylphosphonates with Alkynes.CHEMINFORM, Issue 9 2002Antonio L. Braga 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: Silicone as a New Class of Organosilicon Reagents for the Palladium-Catalyzed Cross-Coupling Reaction.CHEMINFORM, Issue 39 2001Atsunori Mori 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: Palladium-Catalyzed Cross-Coupling Reaction of Alkenyldimethyl(2-pyridyl)silanes with Organic Halides: Complete Switch from the Carbometalation Pathway to the Transmetalation Pathway.CHEMINFORM, Issue 38 2001Kenichiro Itami 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] Synthesis of Functionalized 1-Substituted Alkenylsilanols and Establishment of Conditions for Their Palladium-Catalyzed Cross-Coupling Reactions To Afford 1-Substituted Styrene DerivativesEUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 20 2004Sunil K. Ghosh Abstract An efficient method for the quantitative conversion of 1-substituted alkenyl(phenyl)silanes into the corresponding alkenylsilanols has been developed and used in their palladium(0)-catalyzed, tetrabutylammonium fluoride-promoted cross-coupling reaction with aryl iodides. Copper(I) chloride modulated the reactivity of TBAF in such a way that it virtually eliminated the protiodesilylation of alkenylsilanols, thus favoring the formation of ipso -coupled products. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004) [source] Scope and Limitations of Palladium-Catalyzed Cross-Coupling Reactions with Organogold CompoundsADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 8 2010A. Stephen Abstract Five different alkenylgold(I) phosphane complexes were prepared and then investigated in [1,1,-bis(diphenylphosphino)ferrocene]palladium(II) dichloride-catalyzed cross-coupling reactions with different aryl halides, heterocyclic halides, an alkenyl halide, an alkynyl halide, allylic substrates, benzyl bromide and an acid chloride. With regard to the halides, the iodides were highly reactive, bromides or chlorides gave significantly reduced yields or failed, allylic acetates failed, too. The cross-coupling partners contained a number of different functional groups, while free carboxylic acids did not deliver cross-coupling products and o,o -disubstituted arenes failed as well, a broad range of other functional groups like nitro groups, nitrile groups, ester groups, ,,,-unsaturated ester groups and lactones, aldehydes, alkoxy groups, pyridyl groups, thienyl groups, unprotected phenols and anilines, even aryl azides were tolerated. The structures of one alkenylgold(I) species and of four of the cross-coupling products were proved by crystal structure analyses. [source] A Lutidine-Bridged Bis-Perimidinium Salt: Synthesis and Application as a Precursor in Palladium-Catalyzed Cross-Coupling ReactionsADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 7-8 2009Tao Tu Abstract A novel lutidine-bridged bis-perimidinium dibromide 3 was synthesized in quantitative yield from cheap commercial starting materials. The bisylidene prepared therefrom in situ upon deprotonation is a potent precatalyst in palladium-catalyzed Heck and Suzuki cross-coupling reactions under aerobic conditions, and is efficient even with a ppm scale catalyst loading. Its stronger ,-donor character is held to be responsible for its superior catalytic performance compared with imidazole- and benzimidazole-based analogues bearing the same skeleton precursors. [source] ChemInform Abstract: Scope and Limitations of Palladium-Catalyzed Cross-Coupling Reactions with Organogold Compounds.CHEMINFORM, Issue 42 2010A. Stephen K. Hashmi No abstract is available for this article. [source] ChemInform Abstract: ,-Arylation and Alkynylation of Cyclic ,-Iodoenones Using Palladium-Catalyzed Cross-Coupling Reactions with Trifluoroborate Salts.CHEMINFORM, Issue 25 2010Kemilla Gueogjian 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: [2.2]Paracyclophane-Based Monophosphine Ligand for Palladium-Catalyzed Cross-Coupling Reactions of Aryl Chlorides.CHEMINFORM, Issue 2 2010Jiwu Ruan 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: A Lutidine-Bridged Bis-Perimidinium Salt: Synthesis and Application as a Precursor in Palladium-Catalyzed Cross-Coupling Reactions.CHEMINFORM, Issue 38 2009Tao Tu 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: Convenient Synthesis of Alkenyl-, Alkynyl-, and Allenyl-Substituted Imidazo[1,2-a]pyridines via Palladium-Catalyzed Cross-Coupling Reactions.CHEMINFORM, Issue 19 2008Cecile Enguehard-Gueiffier 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: Palladium-Catalyzed Cross-Coupling Reactions in One-Pot Multicatalytic Processes.CHEMINFORM, Issue 9 2008Helene Lebel 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] Benzylsulfanyloxazolines in Palladium-Catalyzed Cross-Coupling Reactions: A Novel Approach to Chiral Oxazolines.CHEMINFORM, Issue 29 2007Nicolas Leconte 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] Palladium-Catalyzed Cross-Coupling Reactions with Zinc, Boron, and Indium Exhibiting High Turnover Numbers (TONs): Use of Bidentate Phosphines and Other Critical Factors in Achieving High TONs.CHEMINFORM, Issue 26 2005Zhihong Huang Abstract For Abstract see ChemInform Abstract in Full Text. [source] Palladium-Catalyzed Cross-Coupling Reactions of Pyridylboronic Acids with Heteroaryl Halides Bearing a Primary Amine Group: Synthesis of Highly Substituted Bipyridines and Pyrazinopyridines.CHEMINFORM, Issue 23 2005Amy E. Thompson Abstract For Abstract see ChemInform Abstract in Full Text. [source] Synthesis of Conjugated Enediynes via Palladium-Catalyzed Cross-Coupling Reactions of Potassium Alkynyltrifluoroborates.CHEMINFORM, Issue 21 2005George W. Kabalka Abstract For Abstract see ChemInform Abstract in Full Text. [source] Palladium-Catalyzed Cross-Coupling Reactions of 2-Indolyldimethylsilanols with Substituted Aryl Halides.CHEMINFORM, Issue 4 2005Scott E. Denmark Abstract For Abstract see ChemInform Abstract in Full Text. [source] ChemInform Abstract: Diversity-Oriented Synthesis of Multisubstituted Olefins Through the Sequential Integration of Palladium-Catalyzed Cross-Coupling Reactions.CHEMINFORM, Issue 17 20022-Pyridyldimethyl(vinyl)silane as a Versatile Platform for Olefin Synthesis. 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: Regioselective Palladium-Catalyzed Cross-Coupling Reactions in the Synthesis of Novel 2,3-Disubstituted Thiophene Derivatives.CHEMINFORM, Issue 1 2002Raquel Pereira 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] Palladium-Catalyzed Cross-Coupling Reactions of Amines with Alkenyl Bromides: A New Method for the Synthesis of Enamines and IminesCHEMISTRY - A EUROPEAN JOURNAL, Issue 2 2004José Barluenga Prof. Dr. Abstract The palladium-catalyzed cross-coupling reaction of alkenyl bromides with secondary and primary amines gives rise to enamines and imines, respectively. This new transformation expands the applicability of palladium-catalyzed CN bond forming reactions (the Buchwald,Hartwig amination), which have mostly been applied to aryl halides. After screening of different ligands, bases, and solvents, the catalytic combination [Pd2(dba)3]/BINAP in the presence of NaOtBu in toluene gave the best results in the cross-coupling of secondary amines with 1-bromostyrene (dba=dibenzylideneacetone, BINAP=2,2,-bis(diphenylphosphino)-1,1,-binaphthyl). The corresponding enamines are obtained cleanly and in nearly quantitative yields. However, steric hindrance seems to be a limitation of the reaction, as amines carrying large substituents are not well converted. The same methodology can be applied to the coupling of secondary amines with 2-bromostyrene. Moreover, the reaction with substituted 2-bromopropenes allows regioselective synthesis of isomerizable terminal enamines without isomerization of the double bond. The best catalytic conditions for the cross-coupling of 1-bromostyrene with primary amines include again the use of the Pd0/BINAP/NaOtBu system. The reaction gives rise to the expected imines in very short times and with low catalyst loadings. A set of structurally diverse imines can be prepared by this methodology through variations in the structure of both coupling partners. However, 2-bromostyrene failed to give good results in this coupling reaction, probably due to product inhibition of the catalytic cycle. Competition experiments of vinyl versus aryl amination reveal that the reaction occurs preferentially on vinyl bromides. La reacción de acoplamiento cruzado de bromuros de alquenilo con aminas secundarias y primarias da lugar a enaminas e iminas respectivamente. Esta nueva transformación expande las aplicaciones de la reacción de formación de enlaces CN catalizada por paladio (aminación Buchwald,Hartwig), que se había limitado fundamentalmente a haluros de arilo. Después de un estudio de diferentes ligandos. bases y disolventes, los mejores resultados en la reacción de acoplamiento cruzado de aminas secundarias con 1-bromoestireno, se obtuvieron para el catalizador constituido por la combinación Pd/BINAP en presencia de NaOtBu en tolueno. Las correspondientes enaminas se obtienen limpiamente y con rendimientos prácticamente cuantitativos. Sin embargo, los impedimentos estéricos en la amina parecen ser una limitación de la reacción, puesto que aminas con sustituyentes voluminosos proporcionan conversiones bajas. La misma metodología puede aplicarse al acoplamiento de aminas secundarias con 2-bromoestireno. Además, la reacción con 2-bromopropenos sustituidos permite obtener de forma regioselectiva enaminas terminales isomerizables, sin que la isomerización del doble enlace tenga lugar. Las mejores condiciones catalíticas para el acoplamiento de aminas primarias con 1-bromoestireno incluyen de nuevo la utilización del sistema Pd(0)/BINAP/NaOtBu. La reacción proporciona las iminas esperadas en tiempos de reacción muy cortos y con baja carga del catalizador. Mediante esta metodología pueden prepararse un conjunto de iminas de gran diversidad estructural, permitiendo variaciones en ambos reactivos de acoplamiento. Sin embargo, la reacción con 2-bromoestireno no produce buenos resultados en este acoplamiento, probablemente debido a inhibición del ciclo catalítico por parte del producto de reacción. Finalmente, experimentos de competencia de aminación vinílica frente a aminación arílica, ponen de manifiesto que esta reacción se produce de forma preferente sobre los bromuros de vinilo. [source] | ||||||||||