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Intermolecular Hydroamination (intermolecular + hydroamination)

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Chemistry100%

Selected Abstracts

Reusable Gold(I) Catalysts with Unique Regioselectivity for Intermolecular Hydroamination of Alkynes

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 17 2009
Antonio Leyva
Abstract Two gold(I) phosphine complexes bearing the low-coordinating bis(trifluoromethanesulfonyl)imidate ligand, namely AuSPhosNTf2 and AuPPh3NTf2, are active catalysts for the regioselective intermolecular hydroamination of both internal and terminal alkynes under mild reaction conditions. The catalysts show a regioselectivity based on electronic rather than steric factors, which allow the preferential synthesis of regioisomers opposite to those described previously. This subtle chemo- and regioselectivity depends on the catalyst, substrates and reaction conditions employed, and allows one to perform new tandem reactions. These gold(I) complexes operate under free-solvent conditions, without exclusion of air, without addition of acidic promoters and can be quantitatively recovered and reused by simple precipitation in hexane. [source]

ChemInform Abstract: Silver-Catalyzed Intermolecular Hydroamination of Alkenes and 1,3-Dienes.

CHEMINFORM, Issue 17 2010
Xavier Giner
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: (Triphenyl phosphite)gold(I)-Catalyzed Intermolecular Hydroamination of Alkenes and 1,3-Dienes.

CHEMINFORM, Issue 48 2008
Xavier Giner
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: Heteropoly Acids: A Green and Efficient Heterogeneous Broensted Acidic Catalyst for the Intermolecular Hydroamination of Olefins.

CHEMINFORM, Issue 32 2008
Lei Yang
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]

InBr3 -Catalyzed Intermolecular Hydroamination of Unactivated Alkenes.

CHEMINFORM, Issue 35 2007
Jing-Mei Huang
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]

An Efficient Reusable Silver-Exchanged Tungstophosphoric Acid Heterogeneous Catalyst for Solvent-Free Intermolecular Hydroamination of Alkynes.

CHEMINFORM, Issue 19 2007
N. Lingaiah
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 General Study of Aryloxo and Alkoxo Ligands in the Titanium-Catalyzed Intermolecular Hydroamination of Terminal Alkynes.

CHEMINFORM, Issue 11 2006
Annegret Tillack
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]

Platinum-Catalyzed Intermolecular Hydroamination of Unactivated Olefins with Carboxamides.

CHEMINFORM, Issue 32 2004
Xiang Wang
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Palladium-Catalyzed Intermolecular Hydroamination of Alkynes: A Dramatic Rate-Enhancement Effect of o-Aminophenol.

CHEMINFORM, Issue 6 2003
Tomohiro Shimada
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

ChemInform Abstract: Palladium-Catalyzed Intermolecular Hydroamination of Vinylarenes Using Arylamines.

CHEMINFORM, Issue 4 2001
Motoi Kawatsura
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]

BiCl3 -Catalyzed Hydroamination of Norbornene with Aromatic Amines

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 27 2007
Hua Wei
Abstract A BiCl3 -catalyzed hydroamination reaction of norbornene, in which a variety of electron-withdrawing groups were tolerated on amines, was presented. The current transformation possesses the advantages of being highly selective, cheap, and eco-friendly, and this process also represents a rare system for main-group Lewis acid catalyzed intermolecular hydroamination of unactivated alkenes.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007) [source]

Reusable Gold(I) Catalysts with Unique Regioselectivity for Intermolecular Hydroamination of Alkynes

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 17 2009
Antonio Leyva
Abstract Two gold(I) phosphine complexes bearing the low-coordinating bis(trifluoromethanesulfonyl)imidate ligand, namely AuSPhosNTf2 and AuPPh3NTf2, are active catalysts for the regioselective intermolecular hydroamination of both internal and terminal alkynes under mild reaction conditions. The catalysts show a regioselectivity based on electronic rather than steric factors, which allow the preferential synthesis of regioisomers opposite to those described previously. This subtle chemo- and regioselectivity depends on the catalyst, substrates and reaction conditions employed, and allows one to perform new tandem reactions. These gold(I) complexes operate under free-solvent conditions, without exclusion of air, without addition of acidic promoters and can be quantitatively recovered and reused by simple precipitation in hexane. [source]

Bismuth- and Hafnium-Catalyzed Hydroamination of Vinyl Arenes with Sulfonamides, Carbamates, and Carboxamides

CHEMISTRY - AN ASIAN JOURNAL, Issue 1 2007
Hongbo Qin
Abstract Catalytic intermolecular hydroamination of vinyl arenes is described. Our initial investigation revealed that a Bi(OTf)3/[Cu(CH3CN)4]PF6 system previously developed for catalytic intermolecular hydroamination of 1,3-dienes was suitable for hydroamination of a styrene with sulfonamides, but the substrate generality of this system was unsatisfactory. Several metals were screened to expand the substrate scope, and a new Hf(OTf)4/[Cu(CH3CN)4]PF6 system was determined to be highly suitable. The combination of Hf(OTf)4 and [Cu(CH3CN)4]PF6 efficiently promoted the hydroamination of various vinyl arenes, including less-reactive vinyl arenes with electron-withdrawing groups. This strategy was applied to sulfonamides, carbamates, and carboxamides, and products were obtained in up to 99,% yield with 0.3,10,mol,% catalyst loading. [source]

Triazolate Counter Ions in AuI Complexes: Catalysts with Improved Thermal Stability

CHEMCATCHEM, Issue 2 2010
Stephen
Counter revolution: Most homogeneous gold-catalyzed transformations employ gold(I) complexes with weakly coordinating anions, which, their remarkable activity notwithstanding, lack stability at higher temperatures. Shi et,al. have described the synthesis of simple phosphine-based gold(I) complexes with triazolates as counter ions. The compounds are highly thermostable and good catalysts for intermolecular hydroaminations. [source]