Efficient Cross-Coupling of Aryl Chlorides with Arylzinc Reagents Catalyzed by Amido Pincer Complexes of Nickel
作者:Li Wang、Zhong-Xia Wang
DOI:10.1021/ol701927g
日期:2007.10.1
The nickel-catalyzed Negishi cross-coupling reaction of arylchlorides with arylzinc compounds was investigated. The nickel complexes with the amido pincer type of ligands exhibited high catalytic activity and good functional group tolerance.
P,N,N-Pincer nickel-catalyzed cross-coupling of aryl fluorides and chlorides
作者:Dan Wu、Zhong-Xia Wang
DOI:10.1039/c4ob01041h
日期:——
were synthesized and their catalysis toward the Kumada or Negishi cross-coupling reaction of aryl fluorides and chlorides was evaluated. Complex 3a effectively catalyzes the cross-coupling of (hetero)aryl fluorides with aryl Grignard reagents at room temperature. Complex 3a also catalyzes the cross-coupling of (hetero)arylchlorides and arylzinc reagents at 80 °C with low catalyst loadings and good
P,N,N-镍镍配合物[Ni(Cl)N(2-R 2 PC 6 H 4)(2'-Me 2 NC 6 H 4)}](R = Ph,3a ; R = Pr i,合成了3b; R = Cy,3c),并评估了它们对芳基氟化物和氯化物的Kumada或Negishi交叉偶联反应的催化作用。在室温下,配合物3a有效催化(杂)芳基氟化物与芳基格氏试剂的交叉偶联。复杂3a 它还在低催化剂负载和良好的官能团相容性下,于80°C催化(杂)芳基氯和芳基锌试剂的交叉偶联。
New cyclopentadienyl, indenyl or fluorenyl substituted phosphine compounds and their use in catalytic reactions
申请人:Evonik Degussa GmbH
公开号:EP1894938A1
公开(公告)日:2008-03-05
The invention is directed to a phosphine compound represented by general formula (1)
wherein
R' and R" independently are selected from alkyl, cycloalkyl and 2-furyl radicals, or R' and R" are joined together to form with the phosphorous atom a carbon-phosphorous monocycle comprising at least 3 carbon atoms or a carbon-phosphorous bicycle; the alkyl radicals, cycloalkyl radicals, and carbon-phosphorous monocycle being unsubstituted or substituted by at least one radical selected from the group of alkyl, cycloalkyl, aryl, alkoxy, and aryloxy radicals;
Cps is a partially substituted or completely substituted cyclopentadien-1-yl group, including substitutions resulting in a fused ring system, and wherein a substitution at the 1-position of the cyclopentadien-1-yl group is mandatory when the cyclopentadien-1-yl group is not part of a fused ring system or is part of an indenyl group. Also claimed is the use of these phosphines as ligands in catalytic reactions and the preparation of these phosphines.
Nickel-Catalyzed Cross-Coupling of Non-Activated or Functionalized Aryl Halides with Aryl Grignard Reagents
作者:Lan-Gui Xie、Zhong-Xia Wang
DOI:10.1002/chem.201001022
日期:2010.9.10
New nickel complexes can efficiently catalyze cross‐coupling of unactivated and deactivated aryl chlorides and fluorides with aryl Grignard reagents. The reaction can tolerate functional groups in aryl chlorides with or without the aid of additives, depending on the substrates (see scheme).
Room-temperature nickel-catalysed cross-couplings of aryl chlorides with arylzincs
作者:Ning Liu、Li Wang、Zhong-Xia Wang
DOI:10.1039/c0cc03064c
日期:——
P,N,O-chelate nickel complexes efficiently catalyse the cross-coupling reaction of arylchlorides with arylzinc reagents in a 1:1 THF-NMP mixture. The reactions proceed at room temperature with low catalyst loading.