Chiral phosphine ligands derived from sugars-6. syntheses and spectroscopic studies on rhodium complexes with a new type of chiral phosphines

Polyhedron ◽  
1996 ◽  
Vol 15 (22) ◽  
pp. 4061-4067 ◽  
Author(s):  
Jicheng Shi ◽  
Daxu Wu ◽  
Tingbin Wen ◽  
Getan Lu ◽  
Qiutian Liu ◽  
...  
Keyword(s):  
Spectroscopic Studies ◽  
Phosphine Ligands ◽  
Rhodium Complexes ◽  
Chiral Phosphine Ligands ◽  
New Type ◽  
Chiral Phosphines

scholarly journals Copper-catalyzed asymmetric methylation of fluoroalkylated pyruvates with dimethylzinc

2018 ◽  
Vol 14 ◽  
pp. 576-582 ◽  
Author(s):  
Kohsuke Aikawa ◽  
Kohei Yabuuchi ◽  
Kota Torii ◽  
Koichi Mikami
Keyword(s):  
Copper Catalyst ◽  
Phosphine Ligand ◽  
Phosphine Ligands ◽  
Tertiary Alcohols ◽  
Chiral Phosphine Ligands ◽  
Asymmetric Methylation ◽  
Chiral Phosphines ◽  
Catalytic Asymmetric ◽  
High Yields

The catalytic asymmetric methylation of fluoroalkylated pyruvates is shown with dimethylzinc as a methylating reagent in the presence of a copper catalyst bearing a chiral phosphine ligand. This is the first catalytic asymmetric methylation to synthesize various α-fluoroalkylated tertiary alcohols with CF3, CF2H, CF2Br, and n-C n F2 n +1 (n = 2, 3, 8) groups in good-to-high yields and enantioselectivities. Axial backbones and substituents on phosphorus atoms of chiral phosphine ligands critically influence the enantioselectivity. Moreover, the methylation of simple perfluoroalkylated ketones is found to be facilitated by only chiral phosphines without copper.

Rhodium-Catalyzed, Phosphorus(III)-Directed Hydroarylation of Internal Alkynes: Facile and Efficient Access to New Phosphine Ligands

Synlett ◽  
2020 ◽  
Author(s):  
Minyan Wang ◽  
Zhuangzhi Shi ◽  
Huanhuan Luo ◽  
Dawei Wang
Keyword(s):  
High Selectivity ◽  
Enantiomeric Excess ◽  
Phosphine Ligands ◽  
Rapid Construction ◽  
Efficient Access ◽  
Internal Alkynes ◽  
Great Progress ◽  
Chiral Phosphine Ligands ◽  
Optimized Conditions ◽  
Made In

AbstractOrganophosphines are an important class of ligands widely used in organic chemistry. Although great progress has recently been made in the rapid construction of new phosphines through Rh- or Ru-catalyzed C–H bond functionalizations, synthetic access to more diverse phosphines remains a challenge. We describe an efficient process for the rhodium-catalyzed phosphorus(III)-directed hydroarylation of internal alkynes to generate various alkenylated and 2′,6′-dialkenylated biarylphosphines with high selectivity. A range of diverse alkynes and phosphines were effectively prepared with broad functional-group compatibility under the optimized conditions. In addition, the developed protocol can be extended to modify chiral phosphine ligands, providing enantioenriched alkenylated phosphines without erosion of the enantiomeric excess.

A New Type of Chainlike Tetranuclear Rhodium Complexes with PR3 and AsMe3 as Bridging Ligands

2002 ◽  
Vol 41 (13) ◽  
pp. 2301-2303 ◽  
Author(s):  
Thomas Pechmann ◽  
Carsten D. Brandt ◽  
Cornelia Röger ◽  
Helmut Werner
Keyword(s):  
Rhodium Complexes ◽  
Bridging Ligands ◽  
New Type

Kinetics and mechanisms of homogeneous catalytic reactions: Part 15. Regio-specific hydroformylation of limonene catalysed by rhodium complexes of phosphine ligands

2018 ◽  
Vol 43 (5) ◽  
pp. 451-461 ◽  
Author(s):  
Merlín Rosales ◽  
Otto Soto ◽  
Beatriz González ◽  
Inés Pacheco ◽  
Pablo J. Baricelli
Keyword(s):  
Phosphine Ligands ◽  
Catalytic Reactions ◽  
Rhodium Complexes

ChemInform Abstract: Palladium-Catalyzed Asymmetric Allylic Alkylation of Indoles by C-N Bond Axially Chiral Phosphine Ligands.

ChemInform ◽  
2013 ◽  
Vol 44 (41) ◽  
pp. no-no
Author(s):  
Takashi Mino ◽  
Miho Ishikawa ◽  
Kenji Nishikawa ◽  
Kazuya Wakui ◽  
Masami Sakamoto
Keyword(s):  
Phosphine Ligands ◽  
Allylic Alkylation ◽  
Asymmetric Allylic Alkylation ◽  
Axially Chiral ◽  
Chiral Phosphine Ligands ◽  
Palladium Catalyzed
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