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Catalysts
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Sustainable Catalysis in Fine Chemicals, Pharmaceuticals and Biomass Valorization
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Sustainable Catalysis in Fine Chemicals, Pharmaceuticals and Biomass Valorization

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Biomass Catalysis".

Deadline for manuscript submissions: 30 September 2025 | Viewed by 614

Special Issue Editors

Prof. Dr. Gustavo Pablo Romanelli

E-Mail Website
Guest Editor
1. Grupo de Investigación en Síntesis Orgánica Ecoeficiente, Centro de Investigación y Desarrollo en Ciencias Aplicadas “Dr. Jorge J. Ronco” (CINDECA-CCT La Plata-CONICET), Universidad Nacional de La Plata, La Plata B1900AJK, Argentina
2. Cátedra de Química Orgánica, Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, Calles 60 y 119 s/n, La Plata B1904AAN, Argentina
Interests: green chemistry; organic synthesis; heterogeneous catalysts; multicomponent reactions; biomass valorizations
Dr. José J. Martínez

E-Mail Website
Guest Editor
Escuela de Ciencias Químicas, Facultad de Ciencias, Universidad Pedagógica y Tecnológica de Colombia, Tunja 150003, Colombia
Interests: biomass; biocatalysis; hydroxymethylfurfural; furfural; cellulose; hydrogenation

Special Issue Information

Dear Colleagues,

Although the theme of “Sustainable Catalysis in Fine Chemicals, Pharmaceuticals and Biomass Valorization” has been extensively covered in various Special Issues, this particular issue focuses on using solid acids in sustainable catalysis for pharmaceutical production and biomass valorization. Thus, the scope of this issue appeals to a broad audience. Zeolites, sulfonated solids, supported and encapsulated heteropolyacids, and Lewis acid oxides are common examples of materials that have replaced homogeneous acids. Our interest in this topic is driven by the potential of these materials to be useful in conventional synthesis, particularly for the production of pharmaceutical products and biomass valorization.

Prof. Dr. Gustavo Pablo Romanelli
Dr. José J. Martínez
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Catalysts is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • acid catalysts
  • biomass valorization
  • pharmaceuticals
  • heteropolyacids
  • sulphonated solids
  • zeolites
  • fine chemicals

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Published Papers (1 paper)

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Research

24 pages, 3339 KiB  
Article
Mesostructured Silica–Zirconia–Tungstophosphoric Acid Composites as Catalyst in Calcium Channel Blocker Nifedipine Synthesis
by Edna X. Aguilera, Ángel G. Sathicq, Alexis Sosa, Marcelo C. Murguía, José J. Martínez, Luis R. Pizzio and Gustavo P. Romanelli
Catalysts 2025, 15(6), 537; https://doi.org/10.3390/catal15060537 - 28 May 2025
Viewed by 471
Abstract
This work studies the effect of mesostructured silica–zirconia–tungstophosphoric acid (SiO2-ZrO2-TPA) composites used as catalysts in the synthesis of nifedipine by the Hantzsch methodology. The selectivity for nifedipine is determined, along with that of secondary products that may form depending [...] Read more.
This work studies the effect of mesostructured silica–zirconia–tungstophosphoric acid (SiO2-ZrO2-TPA) composites used as catalysts in the synthesis of nifedipine by the Hantzsch methodology. The selectivity for nifedipine is determined, along with that of secondary products that may form depending on the reaction conditions. The materials were synthesized via the sol–gel method and characterized by N2 adsorption–desorption isotherms, infrared spectroscopy (FT-IR), 31P solid-state nuclear magnetic resonance (NMR-MAS), X-ray diffraction (XRD), thermogravimetric analysis (TGA), X-ray photoelectron spectra (XPS), and potentiometric titration. The characterization results from the XPS spectra showed that as the Si/Zr ratio drops, the Si-O-Si signal size decreases, while the Zr-O signal size increases. Characterization by titration indicated that an increase in the total acidity of the material, resulting from support modification with tungstophosphoric acid (H3PW12O40, TPA), enhances the reaction yield. The catalytic activity in the solvent-free Hantzsch reaction was evaluated under thermal heating and microwave irradiation. The experiments conducted at 80 °C achieved a maximum yield of 57% after 4 h of reaction using the Si20Zr80TPA30 catalyst (50 mg), while by microwave heating, the yield significantly improved, reaching 77% in only 1 h of reaction. This catalyst exhibited stability and reusability without significant loss of activity up to the third cycle. Depending on the type of material and the reaction conditions, it is possible to modify the selectivity of the reaction, obtaining a 1,2-dihydropyridine isomeric to nifedipine. Reaction intermediates and other minor secondary products that may be formed in the process were also evaluated. Full article
(This article belongs to the Special Issue Sustainable Catalysis in Fine Chemicals, Pharmaceuticals and Biomass Valorization)
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