Sökning: onr:"swepub:oai:gup.ub.gu.se/257882" >
Manganese-Catalyzed...
Manganese-Catalyzed Cross-Coupling of Aryl Halides and Grignard Reagents by a Radical Mechanism
-
Antonacci, G. (författare)
-
Ahlburg, A. (författare)
-
Fristrup, P. (författare)
-
visa fler...
-
- Norrby, Per-Ola, 1962 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology
-
Madsen, R. (författare)
-
visa färre...
-
(creator_code:org_t)
- 2017-08-25
- 2017
- Engelska.
-
Ingår i: European Journal of Organic Chemistry. - : Wiley. - 1434-193X. ; :32, s. 4758-4764
- Relaterad länk:
-
https://backend.orbi...
-
visa fler...
-
https://gup.ub.gu.se...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- The substrate scope and the mechanism have been investigated for the MnCl2-catalyzed cross-coupling reaction between aryl halides and Grignard reagents. The transformation proceeds rapidly and in good yield when the aryl halide component is an aryl chloride containing a cyano or an ester group in the para position or a cyano group in the ortho position. A range of other substituents gave no conversion of the aryl halide or led to the formation of side products. A broader scope was observed for the Grignard reagents, where a variety of alkyl- and arylmagnesium chlorides participated in the coupling. Two radical-clock experiments were carried out, and in both cases an intermediate aryl radical was successfully trapped. The cross-coupling reaction is therefore believed to proceed by an S(RN)1 mechanism, with a triorganomanganate complex serving as the most likely nucleophile and single-electron donor. Other mechanistic scenarios were excluded based on the substrate scope of the aryl halide.
Ämnesord
- NATURVETENSKAP -- Kemi -- Organisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Organic Chemistry (hsv//eng)
Nyckelord
- Cross-coupling
- Grignard reagents
- Manganese
- Radical reactions
- Reaction mechanisms
- Earth-
- nucleophilic-substitution reactions
- electron-transfer
- organomagnesium
- reagents
- anion-radicals
- iodides
- chlorobenzonitriles
- reduction
- complexes
- ethers
- Chemistry
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas