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1 article(s) from Wiegmann, Björn

Synthesis of new pyrrole–pyridine-based ligands using an in situ Suzuki coupling method

Matthias Böttger,
Björn Wiegmann,
Steffen Schaumburg,
Peter G. Jones,
Wolfgang Kowalsky and
Hans-Hermann Johannes

Beilstein J. Org. Chem. 2012, 8, 1037–1047, doi:10.3762/bjoc.8.116

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Scheme 1: β-diketonate complexes (left), homoleptic complexes (middle) and planned homoleptic complexes of eu...

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Scheme 2: Pyrrole–pyridine-based structures synthesized in this study.

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Scheme 3: Retrosynthetic approach for structures 1–3.

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Scheme 4: Synthesis of the heteroaryl bromides used in the coupling reaction.

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Scheme 5: Generation of the borate intermediate 21/22.

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Scheme 6: In situ Suzuki coupling reactions of the heteroaryl bromides 8–10.

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Figure 1: The structure of compound 1 in the crystal. Ellipsoids correspond to 50% probability levels.

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Figure 2: Packing diagram of compound 1, viewed parallel to the y-axis in the range y ≈ 1/4. Hydrogen bonds a...

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Figure 3: The structure of compound 2·CH₃OH in the crystal. Ellipsoids correspond to 50% probability levels. ...

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Figure 4: Packing diagram of compound 2·CH₃OH showing the formation of inversion-symmetric "stacked" dimers. ...

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Figure 5: The structure of compound 3·C₂H₅OH in the crystal. Ellipsoids correspond to 50% probability levels....

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Figure 6: Packing diagram of compound 3·C₂H₅OH. Hydrogen bonds are shown as thick dashed lines. Hydrogen atom...

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Published 09 Jul 2012

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