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  1. Article ; Online: Molecular basis of two pyrimidine-sulfonylurea herbicides: from supramolecular arrangement to acetolactate synthase inhibition.

    Aguiar, Antônio S N / Costa, Rogério F / Borges, Leonardo L / Dias, Lucas D / Camargo, Ademir J / Napolitano, Hamilton B

    Journal of molecular modeling

    2023  Volume 29, Issue 8, Page(s) 241

    Abstract: Context: The design and synthesis of safe and highly active sulfonylurea herbicides is still a challenge. Therefore, following some principles of structure-activity relationship (SAR) of sulfonylurea herbicides, this work focuses on evaluating two ... ...

    Abstract Context: The design and synthesis of safe and highly active sulfonylurea herbicides is still a challenge. Therefore, following some principles of structure-activity relationship (SAR) of sulfonylurea herbicides, this work focuses on evaluating two sulfonylurea derivatives bearing electron-withdrawing substituents, namely, -(CO)OCH
    Methods: All theoretical calculations were conducted using the highly parameterized empirical exchange-correlation functional M06-2X accompanied by the diffuse and polarized basis set 6-311++G(d,p). The atomic coordinates were obtained directly from the crystalline structures, and from the energies of the frontier molecular orbitals (HOMO and LUMO), chemical descriptors were obtained that indicated the influence of the functional groups in the sulfonylureas on the reactivity of the molecules. The intermolecular interactions in the crystals were analyzed using the Hirshfeld, QTAIM, and NBO surfaces. Toxicophoric modeling was performed by the PharmaGist webserver and molecular docking calculations were performed by the GOLD 2022.1.0 software package so that the ligand was fitted to the binding site in a 10 Å sphere. For this, genetic algorithm parameters were used using the ChemPLP scoring function for docking and ASP for redocking.
    MeSH term(s) Molecular Docking Simulation ; Models, Molecular ; Acetolactate Synthase/chemistry ; Acetolactate Synthase/metabolism ; Herbicides/chemistry ; Herbicides/pharmacology ; Sulfonylurea Compounds/chemistry ; Sulfonylurea Compounds/pharmacology ; Pyrimidines
    Chemical Substances Acetolactate Synthase (EC 2.2.1.6) ; Herbicides ; Sulfonylurea Compounds ; Pyrimidines
    Language English
    Publishing date 2023-07-12
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1284729-X
    ISSN 0948-5023 ; 1610-2940
    ISSN (online) 0948-5023
    ISSN 1610-2940
    DOI 10.1007/s00894-023-05629-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Effect of ortho- and para-chlorine substitution on hydroxychlorochalcone.

    Costa, Rogério F / Aguiar, Antônio S N / Borges, Igor D / Ternavisk, Ricardo / Valverde, Clodoaldo / Camargo, Ademir J / Braz, Delson / Napolitano, Hamilton B / Oliveira, Solemar S

    Journal of molecular modeling

    2021  Volume 27, Issue 2, Page(s) 65

    Abstract: This work describes a comparative molecular structure of two hydroxychlorochalcones with an emphasis on their planarity. Hirshfeld surface analysis investigates the effect of ortho- and para-chlorine substitution on supramolecular arrangement and ... ...

    Abstract This work describes a comparative molecular structure of two hydroxychlorochalcones with an emphasis on their planarity. Hirshfeld surface analysis investigates the effect of ortho- and para-chlorine substitution on supramolecular arrangement and physical chemical properties. The molecular conformation of 2'-hydroxy-4',6'-dimethyl-2-chlorochalcone and 2'-hydroxy-4',6'-dimethyl-4-chlorochalcone chalcones was obtained through DFT with the exchange-correlation functional M06-2X and the 6-311++G(2d,2p) basis set, and the results were compared with the experimental X-ray data in order to get insights on the effect of ortho- and para-chlorine substitution. The charge transfer into entire main carbon chain was also investigated using frontier molecular orbitals (HOMO and LUMO), NBO, and MEP map in order to describe the comparative conformational stability due to the resonance effect produced by π electron displacements. Finally, the intermolecular observed interactions were analyzed by QTAIM, with the M06-2X/6-311G++(d,p) theory level.
    Language English
    Publishing date 2021-02-02
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1284729-X
    ISSN 0948-5023 ; 1610-2940
    ISSN (online) 0948-5023
    ISSN 1610-2940
    DOI 10.1007/s00894-021-04670-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Modeling of a neutron irradiator using Monte Carlo.

    Santos, Raphael F G / Rebello, Wilson F / Estrada, Julio J S / Medeiros, Marcos P C / Silva, Ademir X / Souza, Edmilson M / Costa, Rogério F / Barbosa, Caroline M / Braga, Kelmo L / Braz, Delson

    Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

    2020  Volume 165, Page(s) 109332

    Abstract: The Nuclear Engineering Department of the Military Institute of Engineering (SE/7-IME) is designing and simulation a neutron irradiator with 1 Ci ... ...

    Abstract The Nuclear Engineering Department of the Military Institute of Engineering (SE/7-IME) is designing and simulation a neutron irradiator with 1 Ci of
    Language English
    Publishing date 2020-07-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 1142596-9
    ISSN 1872-9800 ; 0883-2889 ; 0969-8043
    ISSN (online) 1872-9800
    ISSN 0883-2889 ; 0969-8043
    DOI 10.1016/j.apradiso.2020.109332
    Database MEDical Literature Analysis and Retrieval System OnLINE

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