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Gao S, Liu ZJ, Luo YZ, Yao ZJ. Half-sandwich iridium complexes with hydrazone ligands: preparation, structure, and catalytic synthesis of cyanosilylethers under air. Dalton Trans 2023; 52:11104-11112. [PMID: 37493192 DOI: 10.1039/d3dt01617j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
A series of hydrazone-based N,O-chelate half-sandwich iridium complexes were synthesized through a facile route with good yields. These air- and moisture-stable iridium complexes exhibited excellent catalytic activity in the cyanosilylether synthesis under mild reaction conditions. Under the catalysis of iridium, various cyanosilylethers with different substituents were obtained through a one-pot reaction of trimethylsilyl cyanide (TMSCN) with carbonyl substrates, with good to excellent yields. The excellent catalytic efficiency, wide substrate range, and mild reaction conditions made this type of iridium catalyst have the potential for industrial applications. All the half-sandwich iridium complexes were well characterized by IR, NMR, and EA analyses. The molecular structure of iridium complex 1 was confirmed by single-crystal X-ray analysis.
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Affiliation(s)
- Song Gao
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, China.
| | - Zhen-Jiang Liu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, China.
| | - Yu-Zhou Luo
- Scientific Research Office, Guangzhou College of Commerce, Guangzhou, 511363, China.
| | - Zi-Jian Yao
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, China.
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2
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Romero-Fernández MP, Cintas P, Rojas-Buzo S. Switchable Cycloadditions of Mesoionic Dipoles: Refreshing up a Regioselective Approach to Two Distinctive Heterocycles. J Org Chem 2022; 87:12854-12866. [PMID: 36103345 PMCID: PMC9552231 DOI: 10.1021/acs.joc.2c01444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
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Mesoionic rings are
among the most versatile 1,3-dipoles, as witnessed
recently by their incorporation into bio-orthogonal strategies, and
capable of affording unconventional heterocycles beyond the expected
scope of Huisgen cycloadditions. Herein, we revisit in detail the
reactivity of thiazol-3-ium-4-olates with alkynes, leading to thiophene
and/or pyrid-2-one derivatives. A structural variation at the parent
mesoionic dipole alters sufficiently the steric outcome, thereby favoring
the regioselective formation of a single transient cycloadduct, which
undergoes chemoselective fragmentation to either five- or six-membered
heterocycles. The synthetic protocol benefits largely from microwave
(MW) activation, which enhances reaction rates. The mechanism has
been interrogated with the aid of density functional theory (DFT)
calculations, which sheds light into the origin of the regioselectivity
and points to a predictive formulation of reactivity involving competing
pathways of mesoionic cycloadditions.
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Affiliation(s)
- M. Pilar Romero-Fernández
- Department of Organic and Inorganic Chemistry, Faculty of Sciences, and IACYS-Green Chemistry and Sustainable Development Unit, University of Extremadura, 06006 Badajoz, Spain
| | - Pedro Cintas
- Department of Organic and Inorganic Chemistry, Faculty of Sciences, and IACYS-Green Chemistry and Sustainable Development Unit, University of Extremadura, 06006 Badajoz, Spain
| | - Sergio Rojas-Buzo
- Department of Organic and Inorganic Chemistry, Faculty of Sciences, and IACYS-Green Chemistry and Sustainable Development Unit, University of Extremadura, 06006 Badajoz, Spain
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3
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Rodenes M, Gonell F, Martín S, Corma A, Sorribes I. Molecularly Engineering Defective Basal Planes in Molybdenum Sulfide for the Direct Synthesis of Benzimidazoles by Reductive Coupling of Dinitroarenes with Aldehydes. JACS AU 2022; 2:601-612. [PMID: 35373204 PMCID: PMC8965831 DOI: 10.1021/jacsau.1c00477] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Indexed: 06/14/2023]
Abstract
Developing more sustainable catalytic processes for preparing N-heterocyclic compounds in a less costly, compact, and greener manner from cheap and readily available reagents is highly desirable in modern synthetic chemistry. Herein, we report a straightforward synthesis of benzimidazoles by reductive coupling of o-dinitroarenes with aldehydes in the presence of molecular hydrogen. An innovative molecular cluster-based synthetic strategy that employs Mo3S4 complexes as precursors have been used to engineer a sulfur-deficient molybdenum disulfide (MoS2)-type material displaying structural defects on both the naturally occurring edge positions and along the typically inactive basal planes. By applying this catalyst, a broad range of functionalized 2-substituted benzimidazoles, including bioactive compounds, can be selectively synthesized by such a direct hydrogenative coupling protocol even in the presence of hydrogenation-sensitive functional groups, such as double and triple carbon-carbon bonds, nitrile and ester groups, and halogens as well as diverse types of heteroarenes.
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Affiliation(s)
- Miriam Rodenes
- Instituto
de Tecnología Química-Universitat Politècnica
de València-Consejo Superior de Investigaciones Científicas
(UPV-CSIC), Avenida de los Naranjos, s/n, 46022 Valencia, Spain
| | - Francisco Gonell
- Instituto
de Tecnología Química-Universitat Politècnica
de València-Consejo Superior de Investigaciones Científicas
(UPV-CSIC), Avenida de los Naranjos, s/n, 46022 Valencia, Spain
| | - Santiago Martín
- Instituto
de Nanociencia y Materiales de Aragón (INMA), CSIC, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
- Departamento
de Química Física, Facultad de Ciencias, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Avelino Corma
- Instituto
de Tecnología Química-Universitat Politècnica
de València-Consejo Superior de Investigaciones Científicas
(UPV-CSIC), Avenida de los Naranjos, s/n, 46022 Valencia, Spain
| | - Iván Sorribes
- Instituto
de Tecnología Química-Universitat Politècnica
de València-Consejo Superior de Investigaciones Científicas
(UPV-CSIC), Avenida de los Naranjos, s/n, 46022 Valencia, Spain
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4
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Villoria-Del-Álamo B, Rojas-Buzo S, García-García P, Corma A. Zr-MOF-808 as Catalyst for Amide Esterification. Chemistry 2021; 27:4588-4598. [PMID: 33026656 DOI: 10.1002/chem.202003752] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/02/2020] [Indexed: 12/26/2022]
Abstract
In this work, zirconium-based metal-organic framework Zr-MOF-808-P has been found to be an efficient and versatile catalyst for amide esterification. Comparing with previously reported homogeneous and heterogeneous catalysts, Zr-MOF-808-P can promote the reaction for a wide range of primary, secondary and tertiary amides with n-butanol as nucleophilic agent. Different alcohols have been employed in amide esterification with quantitative yields. Moreover, the catalyst acts as a heterogeneous catalyst and could be reused for at least five consecutive cycles. The amide esterification mechanism has been studied on the Zr-MOF-808 at molecular level by in situ FTIR spectroscopic technique and kinetic study.
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Affiliation(s)
- Beatriz Villoria-Del-Álamo
- Instituto de Tecnología Química, UPV-CSIC, Universitat Politècnica de València-Consejo Superior de, Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain
| | - Sergio Rojas-Buzo
- Instituto de Tecnología Química, UPV-CSIC, Universitat Politècnica de València-Consejo Superior de, Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain
| | - Pilar García-García
- Instituto de Tecnología Química, UPV-CSIC, Universitat Politècnica de València-Consejo Superior de, Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain.,Present address: Departamento de Ciencias Farmacéuticas, Facultad de Farmacia, CIETUS, IBSAL, University of Salamanca, Campus Miguel de Unamuno, 37007, Salamanca, Spain
| | - Avelino Corma
- Instituto de Tecnología Química, UPV-CSIC, Universitat Politècnica de València-Consejo Superior de, Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain
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5
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Abstract
Imines, versatile intermediates for organic synthesis, can be exploited for the
preparation of diverse classes of biologically active benzazoles. Because of the special
characteristics of the C=N bond, imines can be simultaneously used in the synthesis of
1,3-benzazoles and 1,2-benzazoles. With the development of imine synthesis, a variety of
novel cascade reactions for benzazole synthesis have been reported in the last decade.
Therefore, there is a strong need to elucidate the recent progress in the formation of various
classes of benzazoles, including benzimidazoles, benzoxazoles, benzothiazoles, indazoles,
and benzisoxazoles, via imines obtained by condensation reactions or oxidative/
redox coupling reactions In this review, we provide a comprehensive survey of this
area. In particular, various green and mild synthetic methodologies are summarized, and
the multiple roles of novel catalysts and significant mechanisms for several transformations are highlighted in
detail. We believe that this review will aid researchers studying the synthesis of complex molecules containing
the benzazole motif via imines.
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Affiliation(s)
- Ran An
- Key Laboratory of Structure-Based Drugs Design and Discovery (Ministry of Education), School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Mengbi Guo
- Key Laboratory of Structure-Based Drugs Design and Discovery (Ministry of Education), School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Yingbo Zang
- Key Laboratory of Structure-Based Drugs Design and Discovery (Ministry of Education), School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Hang Xu
- Key Laboratory of Structure-Based Drugs Design and Discovery (Ministry of Education), School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Zhuang Hou
- Key Laboratory of Structure-Based Drugs Design and Discovery (Ministry of Education), School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Chun Guo
- Key Laboratory of Structure-Based Drugs Design and Discovery (Ministry of Education), School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110016, China
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Najari S, Jafarzadeh M, Bahrami K. Copper(II) Oxide Nanoparticles Impregnated on Melamine‐Modified UiO‐66‐NH
2
Metal–Organic Framework for C–N Cross‐Coupling Reaction and Synthesis of 2‐Substituted Benzimidazoles. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3675] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Susan Najari
- Faculty of ChemistryRazi University Kermanshah 67149‐67346 Iran
| | | | - Kiumars Bahrami
- Faculty of ChemistryRazi University Kermanshah 67149‐67346 Iran
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Rojas-Buzo S, García-García P, Corma A. Zr-MOF-808@MCM-41 catalyzed phosgene-free synthesis of polyurethane precursors. Catal Sci Technol 2019. [DOI: 10.1039/c8cy02235f] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zr-MOF-808@MCM-41 exhibited high catalytic activity, selectivity and stability for the synthesis of aromatic carbamates from aromatic amines and dimethyl carbonate.
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Affiliation(s)
- Sergio Rojas-Buzo
- Instituto de Tecnología Química
- UPV-CSIC
- Universitat Politècnica de València
- Consejo Superior de Investigaciones Científicas
- Valencia
| | - Pilar García-García
- Instituto de Tecnología Química
- UPV-CSIC
- Universitat Politècnica de València
- Consejo Superior de Investigaciones Científicas
- Valencia
| | - Avelino Corma
- Instituto de Tecnología Química
- UPV-CSIC
- Universitat Politècnica de València
- Consejo Superior de Investigaciones Científicas
- Valencia
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Affiliation(s)
- Pilar García-García
- Instituto de Tecnología Química, UPV-CSIC; Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas; Avenida de los Naranjos s/n 46022 Valencia Spain
| | - Avelino Corma
- Instituto de Tecnología Química, UPV-CSIC; Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas; Avenida de los Naranjos s/n 46022 Valencia Spain
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