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Bai Y, Han M, Li X, Feng S, Lu L, Ma S. Facile and Efficient Photocatalyst for Degradation of Chlortetracycline Promoted by H2O2. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00412g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The composite photocatalyst based on a cerium (III) metal-organic framework (MOF-1 or 1), graphene oxide (GO), and Fe3O4 was constructed for the first time and was investigated for the degradation...
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Oberdorf K, Grenzer P, Wieprecht N, Ramler J, Hanft A, Rempel A, Stoy A, Radacki K, Lichtenberg C. CH Activation of Cationic Bismuth Amides: Heteroaromaticity, Derivatization, and Lewis Acidity. Inorg Chem 2021; 60:19086-19097. [PMID: 34818003 DOI: 10.1021/acs.inorgchem.1c02911] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Cationization of Bi(NPh2)3 has recently been reported to allow access to single- and double-CH activation reactions, followed by selective transformation of Bi-C into C-X functional groups (X = electrophile). Here we show that this approach can successfully be transferred to a range of bismuth amides with two aryl groups at the nitrogen, Bi(NRaryl2)3. Exchange of one nitrogen-bound aryl group for an alkyl substituent gave the first example of a homoleptic bismuth amide with a mixed aryl/alkyl substitution pattern at the nitrogen, Bi(NPhiPr)3. This compound is susceptible to selective N-N radical coupling in its neutral form and also undergoes selective CH activation when transformed into a cationic species. The second CH activation is blocked due to the absence of a second aryl moiety at nitrogen. The Lewis acidity of neutral bismuth amides is compared with that of cationic species "[Bi(aryl)(amide)(L)n]+" and "[Bi(aryl)2(L)n]+" based on the (modified) Gutmann-Beckett method (L = tetrahydrofuran or pyridine). The heteroaromatic character of [Bi(C6H3R)2NH(triflate)] compounds, which are iso-valence-electronic with anthracene, is investigated by theoretical methods. Analytical methods used in this work include nuclear magnetic resonance spectroscopy, single-crystal X-ray diffraction, mass spectrometry, and density functional theory calculations.
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Affiliation(s)
- Kai Oberdorf
- Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany.,Department of Inorganic Chemistry, Julius-Maximilians-Universität, Würzburg Am Hubland, 97074 Würzburg, Germany
| | - Patrick Grenzer
- Department of Inorganic Chemistry, Julius-Maximilians-Universität, Würzburg Am Hubland, 97074 Würzburg, Germany
| | - Nele Wieprecht
- Department of Inorganic Chemistry, Julius-Maximilians-Universität, Würzburg Am Hubland, 97074 Würzburg, Germany
| | - Jacqueline Ramler
- Department of Inorganic Chemistry, Julius-Maximilians-Universität, Würzburg Am Hubland, 97074 Würzburg, Germany
| | - Anna Hanft
- Department of Inorganic Chemistry, Julius-Maximilians-Universität, Würzburg Am Hubland, 97074 Würzburg, Germany
| | - Anna Rempel
- Department of Inorganic Chemistry, Julius-Maximilians-Universität, Würzburg Am Hubland, 97074 Würzburg, Germany
| | - Andreas Stoy
- Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany.,Department of Inorganic Chemistry, Julius-Maximilians-Universität, Würzburg Am Hubland, 97074 Würzburg, Germany
| | - Krzysztof Radacki
- Department of Inorganic Chemistry, Julius-Maximilians-Universität, Würzburg Am Hubland, 97074 Würzburg, Germany
| | - Crispin Lichtenberg
- Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany.,Department of Inorganic Chemistry, Julius-Maximilians-Universität, Würzburg Am Hubland, 97074 Würzburg, Germany
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Timonen JM, Turhanen PA. ( E)-Di-iodination of Alkynes Using Dried Dowex H +/NaI Approach. ACS OMEGA 2019; 4:14663-14668. [PMID: 31528823 PMCID: PMC6741282 DOI: 10.1021/acsomega.9b02577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Accepted: 08/15/2019] [Indexed: 06/10/2023]
Abstract
We investigated the usefulness of the dried Dowex H+/NaI approach for the selective di-iodination of alkynes. The Dowex H+/NaI approach selectively produces only (E)-di-iodinated products; it is very straightforward and nontoxic. The utilization of 2-propanol as a solvent in the reactions can be considered as a "green" approach and the method maybe extended to radio-iodination. The method allows access to highly important building blocks. An initial example of the di-iodination and esterification in the same one-pot reaction is also presented.
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