描述了碱性膦L = P(1-Ad)2 n Bu,P t Bu 2 n Bu的空气稳定的钯二氧配合物Pd(O 2)L 2的合成和表征。与一般的看法相反,这些双氧配合物是钯催化的偶联反应的稳定催化剂前体。具体地,使用市售的非脱气溶剂,在空气中高产率地进行芳族溴化物的钯催化的甲酰化和烷氧基羰基化。结果表明,在CO或H 2的还原气氛中,Pd(O 2)L 2络合物被还原成催化活性的钯(0)物种。 在羰基化反应开始时。
A general palladium-catalyzed alkoxycarbonylation of aryl and heteroarylbromides has been developed in the presence of bulky monodentate phosphines. Studies of the butoxycarbonylation of three model substrates revealed the advantages of di-1-adamantyl-n-butylphosphine compared to other ligands. In the presence of this catalyst system various bromoarenes provided the corresponding benzoic acid derivatives
Production of novel phosphane ligands and use in catalytical reactions
申请人:——
公开号:US20040068131A1
公开(公告)日:2004-04-08
The invention relates to novel phosphane ligands of formula (Ia) and (Ib): (adamantyl)nP(alkyl)m(1a); (adamantyl)o(Alkyl)qP (alkylen′)P(adamantyl)r(alkyl)s (1b), wherein adamantyl represents an adamantyl radical (IIa, IIb) bonded to the phosphorous atom in position 1 or 2. The invention also relates to the production and use of the above-mentioned ligands in the presence of transitional metal compounds of the 8th. Subgroup of PSE for catalytic reactions, particularly for the refining of halogen aromatics for producing aryl olefins, dienes, diarylene, benzoic acid and acrylic acid derivatives, aryl alkanes and also amines.
Synthesis and Catalytic Applications of Stable Palladium Dioxygen Complexes
作者:Alexey G. Sergeev、Helfried Neumann、Anke Spannenberg、Matthias Beller
DOI:10.1021/om1003418
日期:2010.8.9
The synthesis and characterization of air-stable palladium dioxygen complexes Pd(O2)L2 of basic phosphines L = P(1-Ad)2nBu, PtBu2nBu is described. Contrary to general belief, these dioxygen complexes are stable catalyst precursors for palladium-catalyzed coupling reactions. Specifically, palladium-catalyzed formylations and alkoxy carbonylations of aryl bromides proceed in high yield in air using commercial
描述了碱性膦L = P(1-Ad)2 n Bu,P t Bu 2 n Bu的空气稳定的钯二氧配合物Pd(O 2)L 2的合成和表征。与一般的看法相反,这些双氧配合物是钯催化的偶联反应的稳定催化剂前体。具体地,使用市售的非脱气溶剂,在空气中高产率地进行芳族溴化物的钯催化的甲酰化和烷氧基羰基化。结果表明,在CO或H 2的还原气氛中,Pd(O 2)L 2络合物被还原成催化活性的钯(0)物种。 在羰基化反应开始时。