Ligands for metals as catalysts for carbon-carbon bond formation
申请人:Liang Lan-Chang
公开号:US20050288504A1
公开(公告)日:2005-12-29
The present invention provides a family of novel and stable ligands which chelate with a metal to form a complex. The ligand contains a ring, particularly a phenyl group, or a hydrocarbon group which links an amino group and PR
1
R
2
, NR
1
R
2
, OR
1
, SR
1
, or AsR
1
R
2
group such that the structure of the ligand can be stabilized.
The present invention mainly relates to a carbon-carbon bond formation catalyzed by a complex comprising a novel and stable ligand and a metal center. The ligand uses a ring, particularly a phenyl group, or a hydrocarbon group to link an amino group and PR
1
R
2
, NR
1
R
2
, OR
1
, SR
1
, or AsR
1
R
2
group for stabling the structure of the ligand.
LIGANDS FOR METALS AS CATALYSTS FOR CARBON-CARBON BOND FORMATION
申请人:LIANG Lan-Chang
公开号:US20090163740A1
公开(公告)日:2009-06-25
The present invention provides a family of novel and stable ligands which chelate with a metal to form a complex. The ligand contains a t-butyl group or a ring, particularly a substituted aromatic group, linked to a nitrogen atom. The nitrogen atom further links to PR
1
R
2
, PR
1
R
2
R
9
, P(═O)R
1
R
2
, NR
1
R
2
, OR
1
, SR
1
, or AsR
1
R
2
group with a saturated or unsaturated hydrocarbon such that the structure of the ligand can be stabilized.
Microwave-Assisted Synthesis of Phenylene-Bridged Aminophosphine Ligands: Acceleration of N-Arylation and Aryl Fluoride Phosphorylation Reactions
作者:Kelsey R. Seipel、Zed H. Platt、Minh Nguyen、Andrew W. Holland
DOI:10.1021/jo8001497
日期:2008.6.1
Hindered beta-aminoarylphosphines show promise as bidentate ligands for metal centers, but their reported synthesis requires heating at high temperatures for several days. Herein are reported conditions by which the two steps composing this synthesis, Buchwald- Hartwig amination and nucleophilic phosphorylation reactions, may both be completed in less than 3 h using microwave irradiation. The effects of several parameters on the outcome of the amination reaction are discussed, as are some indications of the scope within which each of these microwave protocols is effective.
ADAMANTYLGRUPPEN ENTHALTENDE PHOSPHANLIGANDEN, DEREN HERSTELLUNG UND IHRE VERWENDUNG IN KATALYTISCHEN REAKTIONEN