The combination of diethyl phosphite and DMAP as ligands for nickel in an 8:1 THF-N-ethylpyrrolidinone (NEP) mixture allows a very efficient cross-coupling reaction to be performed between various functionalized arylzinc halides and aryl bromides, triflates and activated chlorides. The reaction proceeds at 25 degrees C within 1-48 h and requires only 0.05 mol % of the nickel catalyst.
Nickel or Iron Catalysed Carbon-Carbon Coupling Reaction of Arylenes, Alkenes and Alkines
申请人:knochel Paul
公开号:US20100184977A1
公开(公告)日:2010-07-22
Organozinc compounds of the type R
1
—Ar
1
—ZnY (1) can be reacted with different functionalized aryl halides R
2
—Ar
2
—X (2) in the presence of catalytic amounts of Ni or Fe in a polar solvent or solvent mixture to form polyfunctional biaryles of the type R
1
—Ar
1
—Ar
2
—R
2
(3). Organozinc compounds of the type (1) can be represented by the transmetallation reaction of functionalized aryl magnesium halides or lithium aryl compounds with e.g. ZnBr
2
.
A combination of diethyl phosphite-DMAP and Ni(II) salts forms a very effective catalytic system for the cross-coupling reactions of arylzinc halides with aryl, heteroaryl, and alkenyl bromides. chlorides. triflates. and nonaflates. The choice of solvent is quite important and the mixture of THF-N-ethylpyrrolidinone (NEP) (8: 1) was found to be optimal. The reaction usually requires only 0.05 moll % of NiCl2 or Ni(acac)(2) as catalyst and proceeds at room temperature within 1-48 h. (c) 2006 Elsevier Ltd. All rights reserved.
NICKEL- ODER EISEN-KATALYSIERTE KOHLENSTOFF-KOHLENSTOFF-KUPPLUNGSREAKTION VON ARYLENEN, ALKENEN UND ALKINEN
申请人:Saltigo GmbH
公开号:EP1924539A1
公开(公告)日:2008-05-28
[DE] NICKEL- ODER EISEN-KATALYSIERTE KOHLENSTOFF-KOHLENSTOFF-KUPPLUNGSREAKTION VON ARYLENEN, ALKENEN UND ALKINEN<br/>[EN] NICKEL OR IRON CATALYSED CARBON-CARBON COUPLING REACTION OF ARYLENES, ALKENES AND ALKINES<br/>[FR] REACTION DE COUPLAGE CARBONE-CARBONE ENTRE ARYLENES, ALCENES ET ALCYNES, CATALYSEE PAR NICKEL OU FER
申请人:UNIV MUENCHEN L MAXIMILIANS
公开号:WO2007031511A1
公开(公告)日:2007-03-22
[EN] According to the invention, organozink compounds of R1-Ar1-ZnY (1) type are convertible, with different functionalised aryl halides R2-Ar2-X (2) in the presence of Ni or Fe catalytic quantities in a polar solvent or a polar solvent mixture, into a polyfunctional biarylene of R1-Ar1-AR2-R2 (3) type. The type (1) organic compounds are obtainable by a transmetallisation reaction of aryl-magnesium halides or lithium-aryl compounds, for example with ZnBr2. [FR] Selon l'invention, des composés organozinciques du type R1 -Ar1-ZnY (1), peuvent est convertis avec différents halogénures d'aryle fonctionnalisés R2-Ar2-X (2), en la présence de quantités catalytiques de Ni ou de Fe, dans un solvant polaire ou un mélange de solvants polaires, en biarylène polyfonctionnel du type R1-Ar1-AR2-R2 (3). Des composés organozinciques du type (1) peuvent être obtenus par la réaction de transmétallisation d'halogénures d'arylmagnésium fonctionnalisés ou de composés de lithiumaryle, par ex. avec ZnBr2. [DE] Organozink- Verbindungen des Typs R1 -Ar1-ZnY (1) lassen sich mit verschiedenen funktionalisierten Arylhalogeniden R2-Ar2-X (2) in Gegenwart katalytischer Mengen von Ni oder Fe in einem polaren Lösungsmittel oder Lösungsmittelgemisch zu polyfunktionalen Biarylen des Typs R1-Ar1-AR2-R2 (3) umsetzen. Organozink- Verbindungen des Typs (1) können durch die Transmetallierungsreaktion funktionalisierter Arylmagnesiumhalogenide oder Lithiumarylverbindungen mit z.B. ZnBr2 dargestellt werden.