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Zhang K, Cao K, Sun J, Jin Y, Liu J, Duttwyler S. Crystal Structure of the Monocarborane Magnesium(II) Acetylide and Its Use in the Synthesis of α,β-Unsaturated Ketones. Inorg Chem 2024. [PMID: 39177198 DOI: 10.1021/acs.inorgchem.4c02280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2024]
Abstract
We report the first crystal structure of heteroleptic Grignard reagent 2 based on the carborane endo/exo dianion [CB11H11-12-C≡C]2-. Full characterization reveals a rare coordination pattern and affirms the bimetallic nature. Navigating the reactivity landscape, we unlock the potential of 2 in nucleophilic addition with ketones to afford propargylic alcohols 3, renowned for their synthetic versatility and potential biological activities, and unveil the Meyer-Schuster rearrangement, yielding α,β-unsaturated carbonyl compounds 4. This narrative of synthesis, characterization, and reactivity opens new horizons for carborane chemistry, offering avenues for innovation and facile functionalization of carborane scaffolds.
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Affiliation(s)
- Kang Zhang
- Shaoxing University Yuanpei College, 2799 Qunxian Road, Shaoxing 312000, China
| | - Kang Cao
- Shaoxing University Yuanpei College, 2799 Qunxian Road, Shaoxing 312000, China
| | - Jizeng Sun
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Yujie Jin
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Jiyong Liu
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Simon Duttwyler
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
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2
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Zhang J, Wang J, Liu L, Zhan L. Alkynyl transmetalation triggered by a nucleophilic attack. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00357k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report an interesting alkynyl transmetalation process in the cyclization of π-Au,σ-M acetylides (M = Pd, Ni, Pt) bearing a N-propiolic formamidine moiety. The cyclization was triggered by nucleophilic attack,...
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3
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Duttwyler S, Liu F, Chen T, Zhang K, Jiang T, Liu J. Sonogashira Coupling of the Ethynyl Monocarborane [CB11H11-12-CCH]–. Dalton Trans 2022; 51:10880-10886. [DOI: 10.1039/d2dt01048h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Sonogashira cross coupling between the monocarborane cluster 12-ethynylmonocarba-closo-dodecaborate [CB11H11-12-CCH]– and bromoarenes under Pd catalysis has been developed, providing access to aryl carboranyl alkynes in yields of 42–95%. The transformations...
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4
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Mills HA, Alsarhan F, Ong TC, Gembicky M, Rheingold AL, Spokoyny AM. Icosahedral m-Carboranes Containing Exopolyhedral B-Se and B-Te Bonds. Inorg Chem 2021; 60:19165-19174. [PMID: 34855370 DOI: 10.1021/acs.inorgchem.1c02981] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Chalcogen-containing carboranes have been known for several decades and possess stable exopolyhedral B(9)-Se and B(9)-Te σ bonds despite the electron-donating ability of the B(9) vertex. While these molecules are known, little has been done to thoroughly evaluate their electrophilic and nucleophilic behavior. Herein, we report an assessment of the electrophilic reactivity of m-carboranylselenyl(II), -tellurenyl(II), and -tellurenyl(IV) chlorides and establish their reactivity pattern with Grignard reagents, alkenes, alkynes, enolates, and electron-rich arenes. These electrophilic reactions afford unique electron-rich B-Y-C (Y = Se, Te) bonding motifs not commonly found before. Furthermore, we show that m-carboranylselenolate, and even m-carboranyltellurolate, can be competent nucleophiles and participate in nucleophilic aromatic substitution reactions. Arene substitution chemistry is shown to be further extended to electron-rich species via palladium-mediated cross-coupling chemistry.
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Affiliation(s)
- Harrison A Mills
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Fadi Alsarhan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Ta-Chung Ong
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Milan Gembicky
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Arnold L Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Alexander M Spokoyny
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States.,California NanoSystems Institute, University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, California 90095, United States
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5
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Hailmann M, Radacki K, Finze M. Silver(I) Clusters Stabilized by the Carba‐
closo
‐dodecaboranylethynyl Ligand with
O
‐Donor Coligands and Template Ions. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Michael Hailmann
- Institut für Anorganische Chemie Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Julius‐Maximilians‐Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Krzysztof Radacki
- Institut für Anorganische Chemie Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Julius‐Maximilians‐Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Maik Finze
- Institut für Anorganische Chemie Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Julius‐Maximilians‐Universität Würzburg Am Hubland 97074 Würzburg Germany
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