کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1322532 | 977213 | 2011 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Structure and C–C cross-coupling reactivity of iron(III) complexes of halogenated amine-bis(phenolate) ligands Structure and C–C cross-coupling reactivity of iron(III) complexes of halogenated amine-bis(phenolate) ligands](/preview/png/1322532.png)
The preparation of tetradentate amine-bis(phenol) proligands with dichloro and difluoro substituted phenol groups and their reaction with FeX3 (X = Cl or Br) is described. The compounds, 2-pyridylamino-N,N-bis(2-methylene-4,6-dichlorophenol), H2[L1]; 2-pyridylamino-N,N-bis(2-methylene-4,6-difluorophenol), H2[L2]; dimethylaminoethylamino-N,N-bis(2-methylene-4,6-dichlorophenol), H2[L3]; 2-tetrahydrofurfuryl-N,N-bis(2-methylene-4,6-dichlorophenol), H2[L4]; and methoxyethylamino-N,N-bis(2-methylene-4,6-dichlorophenol), H2[L5] were prepared in aqueous medium and obtained as white powders in good to excellent yield. Ten new iron(III) halide complexes supported by these tetradentate ligands are reported. Representative single crystal X-ray diffraction structures were obtained for H2[L1] and a water adduct of the iron(III) complex, aquachloro{2-pyridylamino-N,N-bis(2-methylene-4,6-dichlorophenolato)}iron(III), 2·H2O. The structure of the proligand H2[L1] shows intramolecular hydrogen bonding. In the solid-state structure, the iron complex exhibits intermolecular hydrogen bonding between the water ligand and the phenolate oxygen of a neighbouring complex. The anhydrous complexes were studied for catalytic activity towards C–C cross-coupling of Grignard reagent nucleophiles with alkyl halide electrophiles.
The synthesis of iron(III) complexes of chloro- and fluoro-functionalized amine-bis(phenolate) ligands, and their application for C–C cross-coupling of Grignard reagents with primary and secondary alkyl halides is described.Figure optionsDownload as PowerPoint slideResearch highlights
► Halogenated amine-bis(phenol) ligands prepared “on-water”.
► New iron(III) complexes are prepared in high yield.
► Fe-catalyzed C–C cross-coupling of Grignard reagents and alkyl halides are studied.
Journal: Journal of Organometallic Chemistry - Volume 696, Issue 3, 1 February 2011, Pages 787–794