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Effective Ligand (effective + ligand)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

P(i-BuNCH2CH2)3N: An Effective Ligand in the Palladium-Catalyzed Amination of Aryl Bromides and Iodides.

CHEMINFORM, Issue 23 2003
Sameer Urgaonkar
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Chiral Tetrafluorobenzobarrelenes as Effective Ligands for Rhodium-Catalyzed Asymmetric 1,4-Addition of Arylboroxines to ,,,-Disubstituted ,,,-Unsaturated Ketones,

ANGEWANDTE CHEMIE, Issue 23 2010
Ryo Shintani Dr.
Quartäre Kohlenstoffstereozentren werden durch die rhodiumkatalysierte 1,4-Addition leicht zugänglicher Arylboronsäureanhydride an ,,,-disubstituierte ,,,-ungesättigte Ketone in Gegenwart eines chiralen Tetrafluorbenzobarrelen-Liganden hoch enantioselektiv aufgebaut. [source]

A Highly Effective Bis(sulfonamide),Diamine Ligand: A Unique Chiral Skeleton for the Enantioselective Cu-Catalyzed Henry Reaction

CHEMISTRY - A EUROPEAN JOURNAL, Issue 28 2010
Wei Jin
A skeleton in the closet! As a unique chiral skeleton, the newly developed bis(sulfonamide),diamine, which contains both diamine and bis(sulfonamide) moieties, was a highly effective ligand for the asymmetric Cu(OAc)2 -catalyzed Henry reaction between nitromethane and aldehydes with a low catalyst loading at room temperature (see scheme). Both aliphatic and aromatic aldehydes gave excellent enantioselectivities of up to 99,%,ee. [source]

Conformational Control of [26]Hexaphyrins(1.1.1.1.1.1) by meso -Thienyl Substituents

CHEMISTRY - A EUROPEAN JOURNAL, Issue 1 2007
Masaaki Suzuki
Abstract Conformational preference and chemical stability of meso -aryl-substituted [26]hexaphyrins(1.1.1.1.1.1) ([26]ArH) depend upon meso -aryl substituents. Although only a planar and rectangular conformation (type-II conformation) has been identified for [26]ArH so far, we have demonstrated here that a different conformation with all the pyrroles pointing inward (type-I conformation) is preferred for [26]ArH (7 and 11 -I) bearing small 2-thienyl or 3-thineyl substituents at 15- and 30-positions. Both type-I and type-II [26]ArH exhibit diatropic ring currents, reflecting aromatic character. Type-I [26]ArH, such as 7 and 11 -I, have been shown to serve as an effective ligand for PdII ions to provide bis-PdII complexes 12 and 13 with N3C1 coordination through facile CH bond activation. [source]