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2. Stabilized Palladium Nanoparticles from Bis-(N-benzoylthiourea) Derived-PdII Complexes as Efficient Catalysts for Sustainable Cross-Coupling Reactions in Water

Author

Universidad de Alicante. Departamento de Química Orgánica, Universidad de Alicante. Instituto Universitario de Síntesis Orgánica, Poyraz, Samet, Dondas, H. Ali, Belveren, Samet, Tas, Senanur, Hidalgo-León, Raquel, Trujillo-Sierra, José, Rodríguez-Flórez, Lesly V., Retamosa, Maria de Gracia, Sirvent, Ana, Gholinejad, Mohammad, Sobhani, Sara, Sansano, Jose M., Universidad de Alicante. Departamento de Química Orgánica, Universidad de Alicante. Instituto Universitario de Síntesis Orgánica, Poyraz, Samet, Dondas, H. Ali, Belveren, Samet, Tas, Senanur, Hidalgo-León, Raquel, Trujillo-Sierra, José, Rodríguez-Flórez, Lesly V., Retamosa, Maria de Gracia, Sirvent, Ana, Gholinejad, Mohammad, Sobhani, Sara, and Sansano, Jose M.

Abstract

Stable palladium (II) complexes, incorporating a double (N-benzoylthiourea) arrangement bonded to a complex heterocyclic scaffold, are used as precursors of catalytic species able to promote Suzuki–Miyaura, Mizoroki–Heck, Hiyama, Buchwald–Hartwig, Hirao and Sonogashira–Hagihara cross-coupling transformations in water. These sustainable processes are chemoselective and very versatile. The nanoparticles responsible for these catalytic reactions were analyzed and studied. Their usefulness is demonstrated after several tests and analyses. The heterogeneous character of this species in water was also confirmed.

Published
2024

3. Preparation of a ruthenium complex covalently bonded to multilayer graphene and its evaluation as a photocatalyst

Author

Universidad de Alicante. Departamento de Química Orgánica, Universidad de Alicante. Departamento de Química Inorgánica, Universidad de Alicante. Instituto Universitario de Síntesis Orgánica, Universidad de Alicante. Instituto Universitario de Materiales, Rodríguez-Flórez, Lesly V., Retamosa, Maria de Gracia, Navlani-García, Miriam, Cazorla-Amorós, Diego, Nájera, Carmen, Yus, Miguel, Sansano, Jose M., Universidad de Alicante. Departamento de Química Orgánica, Universidad de Alicante. Departamento de Química Inorgánica, Universidad de Alicante. Instituto Universitario de Síntesis Orgánica, Universidad de Alicante. Instituto Universitario de Materiales, Rodríguez-Flórez, Lesly V., Retamosa, Maria de Gracia, Navlani-García, Miriam, Cazorla-Amorós, Diego, Nájera, Carmen, Yus, Miguel, and Sansano, Jose M.

Abstract

Multilayer graphene (MLG), obtained by mild sonication of graphite in NMP, was functionalised via 1,3-dipolar cycloaddition with azomethine ylides generated by thermal 1,2-prototropy from various imino esters. The microwave-assisted functionalisation took place in five hours at 100 °C. The resulting MLG, containing substituted proline-based amine functional groups, was characterized using XPS and showed a nitrogen loading three times that obtained for the same transformation performed for five days using convection-assisted heating. The preparation of the imino ester containing a bipyridine unit at the arylidene position allowed for the preparation of the corresponding functionalised MLG, which incorporated the ruthenium atom to achieve a heterogeneous MLG-Ru complex. This supported complex was tested, as a proof of concept, as a photocatalyst of the aerobic oxidative hydroxylation of 4-methoxyphenylboronic acid.

Published
2024

4. Stabilized Palladium Nanoparticles from Bis-(N-benzoylthiourea) Derived-PdII Complexes as Efficient Catalysts for Sustainable Cross-Coupling Reactions in Water

Author

Poyraz, Samet, primary, Döndaş, H. Ali, additional, Belveren, Samet, additional, Taş, Senanur, additional, Hidalgo-León, Raquel, additional, Trujillo-Sierra, José, additional, Rodríguez-Flórez, Lesly V., additional, Retamosa, Mª de Gracia, additional, Sirvent, Ana, additional, Gholinejad, Mohammad, additional, Sobhani, Sara, additional, and Sansano, José M., additional

Published
2024
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7. Microwave-Assisted Functionalization of Single-Walled Carbon Nanotubes as a Platform for a Supported Iridium Catalyst.

Author

Rodríguez-Flórez, Lesly V., Retamosa, María de Gracia, Martínez-Sánchez, Beatriz, Cazorla-Amorós, Diego, Nájera, Carmen, Yus, Miguel, and Sansano, José M.

Subjects
*IRIDIUM catalysts, *CARBON nanotubes, *MATERIALS science, *CARBON-based materials, *CHEMICAL amplification, *HETEROGENEOUS catalysis
Abstract

This article explores the functionalization of single-walled carbon nanotubes (SWCNTs) through covalent chemical transformations. The authors focus on the Prato reaction and the use of azomethine ylides as intermediates. They investigate different reaction conditions and heating methods to optimize the process. The study also examines the application of an iridium-supported catalyst for the reduction of acetophenone. The findings provide valuable insights into the potential applications of SWCNTs in electronics, biosensors, energy storage, and medicine. Additionally, the study discusses the use of imino esters for functionalizing SWCNTs and the successful preparation of a heterogeneous catalyst using the functionalized SWCNTs as a metal support. The catalyst showed high efficiency in catalyzing the Meerwein-Ponndorf-Verley reduction of acetophenone. The study also highlights the advantages of microwave-assisted heating and the potential industrial applications of the supported catalyst. [Extracted from the article]

Published
2024
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9. Stabilized Palladium Nanoparticles from Bis-(N -benzoylthiourea) Derived-Pd II Complexes as Efficient Catalysts for Sustainable Cross-Coupling Reactions in Water.

Author

Poyraz, Samet, Döndaş, H. Ali, Belveren, Samet, Taş, Senanur, Hidalgo-León, Raquel, Trujillo-Sierra, José, Rodríguez-Flórez, Lesly V., Retamosa, Mª de Gracia, Sirvent, Ana, Gholinejad, Mohammad, Sobhani, Sara, and Sansano, José M.

Subjects
SUZUKI reaction, PALLADIUM, NANOPARTICLES, CATALYSTS, HETEROGENEOUS catalysis
Abstract

Stable palladium (II) complexes, incorporating a double (N-benzoylthiourea) arrangement bonded to a complex heterocyclic scaffold, are used as precursors of catalytic species able to promote Suzuki–Miyaura, Mizoroki–Heck, Hiyama, Buchwald–Hartwig, Hirao and Sonogashira–Hagihara cross-coupling transformations in water. These sustainable processes are chemoselective and very versatile. The nanoparticles responsible for these catalytic reactions were analyzed and studied. Their usefulness is demonstrated after several tests and analyses. The heterogeneous character of this species in water was also confirmed. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
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10. Microwave-Assisted Functionalization of Single-Walled Carbon Nanotubes as a Platform for a Supported Iridium Catalyst

Author

Universidad de Alicante. Departamento de Química Orgánica, Universidad de Alicante. Departamento de Química Inorgánica, Universidad de Alicante. Instituto Universitario de Síntesis Orgánica, Universidad de Alicante. Instituto Universitario de Materiales, Rodríguez-Flórez, Lesly V., Retamosa, Maria de Gracia, Martínez-Sánchez, Beatriz, Cazorla-Amorós, Diego, Nájera, Carmen, Yus, Miguel, Sansano, Jose M., Universidad de Alicante. Departamento de Química Orgánica, Universidad de Alicante. Departamento de Química Inorgánica, Universidad de Alicante. Instituto Universitario de Síntesis Orgánica, Universidad de Alicante. Instituto Universitario de Materiales, Rodríguez-Flórez, Lesly V., Retamosa, Maria de Gracia, Martínez-Sánchez, Beatriz, Cazorla-Amorós, Diego, Nájera, Carmen, Yus, Miguel, and Sansano, Jose M.

Abstract

Single-walled carbon nanotubes (SWCNTs) were functionalized by treatment with imino esters through 1,3-dipolar cycloaddition activated by thermal 1,2-prototropy. The reaction was optimized and analyzed by using various heating methods. The functionalization afforded pyrrolidino-functionalized nanotubes that were characterized by using several techniques. The ester group was then transformed into the corresponding SWCNT–iridium carboxylate and, as a proof of concept, the product was tested as a catalyst in the hydrogen-transfer reaction of acetophenone to yield 1-phenylethanol.

Published
2023

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