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Gao S, Lin X, Shi Y, Zhou H, Zheng X, Li M, Lin T. A New Hypoglycemic Prenylated Indole Alkaloid N-Oxide from Endophytic Fungus Pallidocercospora crystalline. Int J Mol Sci 2023; 24:ijms24108767. [PMID: 37240113 DOI: 10.3390/ijms24108767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/09/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
A new prenylated indole alkaloid-Penicimutamide C N-oxide (1), a new alkaloid penicimutamine A (2), along with six known alkaloids were isolated from an endophytic fungus Pallidocercospora crystallina. A simple and accurate method was used to determine the N-O bond in the N-oxide group of 1. By using a β-cell ablation diabetic zebrafish model, compounds 1, 3, 5, 6 and 8 showed significantly hypoglycemic activities under the concentration of 10 μM. Further studies revealed that compounds 1 and 8 lowered the glucose level through promoting glucose uptake in zebrafish. In addition, all eight compounds showed no acute toxicity, teratogenicity, nor vascular toxicity in zebrafish under the concentrations range from 2.5 μΜ to 40 μM. Importantly, these results provide new lead compounds for the development of antidiabetes strategies.
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Affiliation(s)
- Shuo Gao
- Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Xiao Lin
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen 361102, China
| | - Yeqin Shi
- Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Hu Zhou
- Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Xiao Zheng
- Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Mingyu Li
- Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Ting Lin
- Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
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2
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An Intramolecular Hydroaminomethylation-Based Approach to Pyrrolizidine Alkaloids under Microwave-Assisted Heating. Molecules 2022; 27:molecules27154762. [PMID: 35897934 PMCID: PMC9332719 DOI: 10.3390/molecules27154762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 07/14/2022] [Accepted: 07/22/2022] [Indexed: 12/04/2022] Open
Abstract
A general method for the synthesis of pyrrolizidine derivatives using an intramolecular hydroaminomethylation protocol (HAM) under microwave (MW) dielectric heating is reported. Starting from a 3,4-bis(benzyloxy)-2-[(benzyloxy)methyl]-5-vinylpyrrolidine, MW-assisted intramolecular HAM in the presence of gaseous H2 and CO gave the natural alkaloid hyacinthacine A2 protected as benzyl ether. The same approach gave a lentiginosine analogue starting from the corresponding vinyl N-hydroxypyrrolidine. The nature of the reaction products and the yields were strongly influenced by the relative stereochemistry of the starting pyrrolidines, as well as by the catalyst/ligand employed. The use of ethanol as a solvent provides environmentally friendly conditions, while the ligand/catalyst system can be recovered by separating the alkaloid product with an SCX column and recycling the ethanolic solution. HAM worked up to three times with the recycled catalyst solution without any significant impact on yield.
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3
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Clemente F, Matassini C, Giachetti S, Goti A, Morrone A, Martínez-Bailén M, Orta S, Merino P, Cardona F. Piperidine Azasugars Bearing Lipophilic Chains: Stereoselective Synthesis and Biological Activity as Inhibitors of Glucocerebrosidase (GCase). J Org Chem 2021; 86:12745-12761. [PMID: 34469155 PMCID: PMC8453635 DOI: 10.1021/acs.joc.1c01308] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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We report a straightforward
synthetic strategy for the preparation
of trihydroxypiperidine azasugars decorated with lipophilic chains
at both the nitrogen and the adjacent carbon as potential inhibitors
of the lysosomal enzyme glucocerebrosidase (GCase), which is involved
in Gaucher disease. The procedure relies on the preparation of C-erythrosyl N-alkylated nitrones 10 through reaction of aldehyde 8 and primary
amines 13 followed by oxidation of the imines formed in situ with the methyltrioxorhenium catalyst and urea hydrogen
peroxide. The addition of octylMgBr to nitrone 10e provided
access to both epimeric hydroxylamines 21 and 22 with opposite configuration at the newly created stereocenter in
a stereodivergent and completely stereoselective way, depending on
the absence or presence of BF3·Et2O. Final
reductive amination and acetonide deprotection provided compounds 14 and 15 from low-cost d-mannose in
remarkable 43 and 32% overall yields, respectively, over eight steps.
The C-2 R-configured bis-alkylated trihydroxypiperidine 15 was the best ligand for GCase (IC50 = 15 μM),
in agreement with MD simulations that allowed us to identify the chair
conformation corresponding to the best binding affinity.
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Affiliation(s)
- Francesca Clemente
- Dipartimento di Chimica "Ugo Schiff" (DICUS), University of Firenze, Via Della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
| | - Camilla Matassini
- Dipartimento di Chimica "Ugo Schiff" (DICUS), University of Firenze, Via Della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
| | - Sara Giachetti
- Dipartimento di Chimica "Ugo Schiff" (DICUS), University of Firenze, Via Della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
| | - Andrea Goti
- Dipartimento di Chimica "Ugo Schiff" (DICUS), University of Firenze, Via Della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
| | - Amelia Morrone
- Paediatric Neurology Unit and Laboratories, Neuroscience Department, Meyer Children's Hospital, and Department of Neurosciences, Pharmacology and Child Health, University of Florence, Viale Pieraccini n. 24, 50139 Firenze, Italy
| | - Macarena Martínez-Bailén
- Dipartimento di Chimica "Ugo Schiff" (DICUS), University of Firenze, Via Della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy.,Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, c/ Prof. García González 1, E-41012 Sevilla, Spain
| | - Sara Orta
- Unidad de Glicobiología, Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Pedro Merino
- Unidad de Glicobiología, Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Francesca Cardona
- Dipartimento di Chimica "Ugo Schiff" (DICUS), University of Firenze, Via Della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
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González-Rodríguez J, Soengas RG, Rodríguez-Solla H. A cooperative zinc/catalytic indium system for the stereoselective sequential synthesis of ( E)-1,3-dienes from carbonyl compounds. Org Chem Front 2021. [DOI: 10.1039/d0qo01388a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel cooperative system based on zinc/catalytic indium for the stereoselective synthesis of highly functionalized (E)-1,3-dienes from aldehydes and ketones has been developed.
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Affiliation(s)
| | - Raquel G. Soengas
- Departamento de Química Orgánica e Inorgánica
- Universidad de Oviedo
- Oviedo
- Spain
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