Browsing by Author "Zhou, Ziniu"

Now showing 1 - 4 of 4
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    Solid-Phase Synthesis of Amine/Carboxyl Substituted Prolines and Proline Homologues: Scope and Limitations
    (MDPI, 2016-03) Zhou, Ziniu; Scott, William L.; O'Donnell, Martin J.; Department of Chemistry & Chemical Biology, School of Science
    A solid-phase procedure is used to synthesize racemic peptidomimetics based on the fundamental peptide unit. The peptidomimetics are constructed around proline or proline homologues variably substituted at the amine and carbonyl sites. The procedure expands the diversity of substituted peptidomimetic molecules available to the Distributed Drug Discovery (D3) project. Using a BAL-based solid-phase synthetic sequence the proline or proline homologue subunit is both constructed and incorporated into the peptidomimetic by an α-alkylation, hydrolysis and intramolecular cyclization sequence. Further transformations on solid-phase provide access to a variety of piperazine derivatives representing a class of molecules known to exhibit central nervous system activity. The procedure works well with proline cores, but with larger six- and seven-membered ring homologues the nature of the carboxylic acid acylating the cyclic amine can lead to side reactions and result in poor overall yields.
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    Solid-Phase Synthesis of Arylpiperazine Derivatives and Implementation of the Distributed Drug Discovery (D3) Project in the Search for CNS Agents
    (MDPI, 2011-05-19) Zajdel, Paweł; Król, Joanna; Grychowska, Katarzyna; Pawłowski, Maciej; Subra, Gilles; Nomezine, Gaël; Martinez, Jean; Satała, Grzegorz; Bojarski, Andrzej J.; Zhou, Ziniu; O’Donnell, Martin J.; Scott, William L.; Chemistry and Chemical Biology, School of Science
    We have successfully implemented the concept of Distributed Drug Discovery (D3) in the search for CNS agents. Herein, we demonstrate, for the first time, student engagement from different sites around the globe in the development of new biologically active compounds. As an outcome we have synthesized a 24-membered library of arylpiperazine derivatives targeted to 5-HT1A and 5-HT2A receptors. The synthesis was simultaneously performed on BAL-MBHA-PS resin in Poland and the United States, and on BAL-PS-SynPhase Lanterns in France. The D3 project strategy opens the possibility of obtaining potent 5-HT1A/5-HT2A agents in a distributed fashion. While the biological testing is still centralized, this combination of distributed synthesis with screening will enable a D3 network of students world-wide to participate, as part of their education, in the synthesis and testing of this class of biologically active compounds.
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    Solid-Phase Synthesis of Arylpiperazine Derivatives and Implementation of the Distributed Drug Discovery (D3) Project in the Search for CNS Agents
    (MDPI, 2011-05) Zajdel, Pawel; Król, Joanna; Grychowska, Katarzyna; Pawłowski, Maciej; Subra, Gilles; Nomezine, Gaël; Martinez, Jean; Satala, Grzegorz; Bojarski, Andrzej J.; Zhou, Ziniu; O'Donnell, Martin J.; Scott, William; Chemistry and Chemical Biology, School of Science
    We have successfully implemented the concept of Distributed Drug Discovery (D3) in the search for CNS agents. Herein, we demonstrate, for the first time, student engagement from different sites around the globe in the development of new biologically active compounds. As an outcome we have synthesized a 24-membered library of arylpiperazine derivatives targeted to 5-HT1A and 5-HT2A receptors. The synthesis was simultaneously performed on BAL-MBHA-PS resin in Poland and the United States, and on BAL-PS-SynPhase Lanterns in France. The D3 project strategy opens the possibility of obtaining potent 5-HT1A/5-HT2A agents in a distributed fashion. While the biological testing is still centralized, this combination of distributed synthesis with screening will enable a D3 network of students world-wide to participate, as part of their education, in the synthesis and testing of this class of biologically active compounds.
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    Solid-phase synthetic route to multiple derivatives of a fundamental peptide unit
    (MDPI, 2010-07-20) Scott, William L.; Zhou, Ziniu; Zajdel, Pawel; Pawlowski, Maciej; O'Donnell, Martin J.; Chemistry and Chemical Biology, School of Science
    Amino acids are Nature's combinatorial building blocks. When substituted on both the amino and carboxyl sides they become the basic scaffold present in all peptides and proteins. We report a solid-phase synthetic route to large combinatorial variations of this fundamental scaffold, extending the variety of substituted biomimetic molecules available to successfully implement the Distributed Drug Discovery (D3) project. In a single solid-phase sequence, compatible with basic amine substituents, three-point variation is performed at the amino acid a-carbon and the amino and carboxyl functionalities.