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.
Amido Pincer Complexes of Palladium: Synthesis, Structure, and Catalytic Heck Reaction
作者:Mei-Hui Huang、Lan-Chang Liang
DOI:10.1021/om049888g
日期:2004.5.1
Palladiumcomplexes containing an o-phenylene-derived amido diphosphine ligand efficiently catalyze the Heck olefination of a wide array of aryl halides, leading to extremely high turnover numbers of up to 4.5 × 107.
Metal complexes for catalytic carbon-carbon bond formation
申请人:Liang Lan-Chang
公开号:US20050288505A1
公开(公告)日:2005-12-29
The present invention relates to a complex comprising a novel and stable ligand and a metal center. 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 synthesis of a series of divalent palladium and platinumcomplexes containing amido PNP pincer ligands of the type [N(o‐C6H4PR2)2]− (R = Ph (1a), iPr (1b)) is reported. Metathetical reactions of [1a–b]PdCl or [1a–b]PtCl with a variety of alkyl Grignard reagents or LiHBEt3 in ethereal or arene solutions generate their corresponding alkyl or hydride complexes [1a]PdR1 (R1 = Me, Et, nBu), [1b]PdR1