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Hans AC, Becker PM, Haußmann J, Suhr S, Wanner DM, Lederer V, Willig F, Frey W, Sarkar B, Kästner J, Peters R. A Practical and Robust Zwitterionic Cooperative Lewis Acid/Acetate/Benzimidazolium Catalyst for Direct 1,4-Additions. Angew Chem Int Ed Engl 2023; 62:e202217519. [PMID: 36651714 DOI: 10.1002/anie.202217519] [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: 11/28/2022] [Revised: 01/17/2023] [Accepted: 01/18/2023] [Indexed: 01/19/2023]
Abstract
A catalyst type is disclosed allowing for exceptional efficiency in direct 1,4-additions. The catalyst is a zwitterionic entity, in which acetate binds to CuII , which is formally negatively charged and serving as counterion for benzimidazolium. All 3 functionalities are involved in the catalytic activation. For maleimides productivity was increased by a factor >300 compared to literature (TONs up to 6700). High stereoselectivity and productivity was attained for a broad range of other Michael acceptors as well. The polyfunctional catalyst is accessible in only 4 steps from N-Ph-benzimidazole with an overall yield of 96 % and robust during catalysis. This allowed to reuse the same catalyst multiple times with nearly constant efficiency. Mechanistic studies, in particular by DFT, give a detailed picture how the catalyst operates. The benzimidazolium unit stabilizes the coordinated enolate nucleophile and prevents that acetate/acetic acid dissociate from the catalyst.
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Affiliation(s)
- Andreas C Hans
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Patrick M Becker
- Universität Stuttgart, Institut für Theoretische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Johanna Haußmann
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Simon Suhr
- Universität Stuttgart, Institut für Anorganische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Daniel M Wanner
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Vera Lederer
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Felix Willig
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Wolfgang Frey
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Biprajit Sarkar
- Universität Stuttgart, Institut für Anorganische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Johannes Kästner
- Universität Stuttgart, Institut für Theoretische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - René Peters
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
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Landeros JM, Cruz‐Hernández C, Juaristi E. α‐Amino Acids and α,β‐Dipeptides Intercalated into Hydrotalcite: Efficient Catalysts in the Asymmetric Michael Addition Reaction of Aldehydes to
N
‐Substituted Maleimides. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100877] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- José M. Landeros
- Departamento de Química, Centro de Investigación y de Estudios Avanzados Instituto Politécnico Nacional Avenida IPN #2508 07360 Ciudad de México Mexico
| | - Carlos Cruz‐Hernández
- Departamento de Química, Centro de Investigación y de Estudios Avanzados Instituto Politécnico Nacional Avenida IPN #2508 07360 Ciudad de México Mexico
| | - Eusebio Juaristi
- Departamento de Química, Centro de Investigación y de Estudios Avanzados Instituto Politécnico Nacional Avenida IPN #2508 07360 Ciudad de México Mexico
- El Colegio Nacional Luis González Obregón 23, Centro Histórico 06020 Ciudad de México Mexico
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3
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Wu F, Zhang R, Feng Q, Cheng H, Xue J, Chen J. (-)-Clausenamide alleviated ER stress and apoptosis induced by OGD/R in primary neuron cultures. Neurol Res 2020; 42:730-738. [PMID: 32588767 DOI: 10.1080/01616412.2020.1771040] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
OBJECTIVE The endoplasmic reticulum stress (ERS) and ERS-related neuronal apoptosis contribute to the cerebral ischemia/reperfusion (I/R) injury. (-)-Clausenamide has been reported to be nootropic and improve learning and memory in amnesia animal models. However, whether (-)-Clau could protect neurons from ischemic injury and the possible mechanism needed further study. The present study aimed to explore the effects of (-)-Clau on primary cortical neurons treated with oxygen-glucose deprivation/reoxygenation (OGD/R). METHODS Rat primary cortical neurons were used to set up an injury model of OGD/R which imitated the clinical I/R injury. Cell viability and apoptosis were measured by CCK-8 assay, LDH detection and TUNEL staining, respectively. The activation of GRP78/eIF2α-ATF4-CHOP signaling pathway, one of the three branches of ERS, and cleaved caspase-3, the apoptotic marker, were assessed by western blotting. RESULTS OGD/R induced activation of GRP78/eIF2α-ATF4-CHOP signaling pathway. (-)-Clau significantly attenuated OGD/R-induced decrease in the cellular viability and the activation of GRP78, eIF2α, ATF4 and CHOP. To further confirm the effect of (-)-Clau on OGD/R-induced ERS activation, the ERS inducer Tunicamycin (TM) was applied. TM significantly abolished (-)-Clau's protective effect against ERS and neuronal apoptosis, indicating that the protective effect of (-)-Clau was dependent on inhibiting ERS. CONCLUSIONS The present work demonstrated for the first time that (-)-Clau could reverse the activation of GRP78/eIF2α-ATF4-CHOP branch, thus inhibited ERS and the subsequent apoptosis induced by OGD/R and promoted cell viability in vitro. (-)-Clau could serve as a promising therapeutic agent in the treatment for ischemic stroke in the future. ABBREVIATIONS ATF4: activating transcription factor-4; ATF6: activating transcription factor-6; CHOP: transcriptional induction of CCAAT/enhancer binding protein homologous protein; (-)-Clau: 3-hydroxy-4-phenyl-5a-hydroxybenzylN-methyl-g-lactam; eIF2α: eukaryotic initiation factor 2α; ER: endoplasmic reticulum; ERS: endoplasmic reticulum stress; GRP78: 78-kDa glucose regulated protein; I/R: ischemia/reperfusion; IRE1: inositol requiring enzyme-1; JNK: c-Jun N-terminal kinase; OGD/R: oxygen-glucose deprivation/reoxygenation; PERK: double-stranded RNA-dependent protein kinase-like ER kinase; TM: Tunicamycin; UPR: unfolded protein response.
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Affiliation(s)
- Fei Wu
- Institute of Neurobiology, Jining Medical University , Jining, China
| | - Rumin Zhang
- Institute of Neurobiology, Jining Medical University , Jining, China
| | - Qizhen Feng
- School of Clinical Medicine, Jining Medical University , Jining, China
| | - Hongju Cheng
- College of Basic Medicine, Jining Medical University , Jining, China
| | - Jianjun Xue
- College of Basic Medicine, Jining Medical University , Jining, China
| | - Jing Chen
- Institute of Neurobiology, Jining Medical University , Jining, China
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Organocatalytic Asymmetric Conjugate Addition of Aldehydes to Maleimides and Nitroalkenes in Deep Eutectic Solvents. Molecules 2019; 24:molecules24224058. [PMID: 31717507 PMCID: PMC6891809 DOI: 10.3390/molecules24224058] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 11/07/2019] [Accepted: 11/07/2019] [Indexed: 11/16/2022] Open
Abstract
A chiral primary amine-salicylamide is used as an organocatalyst for the enantioselective conjugate addition of α,α-disubstituted aldehydes to maleimides and nitroalkenes. The reactions are performed in deep eutectic solvents as reaction media at room temperature, leading to the corresponding adducts with enantioselectivities up to 88% (for maleimides) and 80% (for nitroalkenes). Catalyst and solvent can be recovered and reused.
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Recent advances in the applications of Wittig reaction in the total synthesis of natural products containing lactone, pyrone, and lactam as a scaffold. MONATSHEFTE FUR CHEMIE 2019. [DOI: 10.1007/s00706-019-02465-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Suć Sajko J, Ljoljić Bilić V, Kosalec I, Jerić I. Multicomponent Approach to a Library of N-Substituted γ-Lactams. ACS COMBINATORIAL SCIENCE 2019; 21:28-34. [PMID: 30563326 DOI: 10.1021/acscombsci.8b00147] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The γ-lactam motif is often found in naturally occurring compounds with diverse biological activities. We prepared a 28-member library of N-substituted γ-lactams following a single-pot, three-component Ugi reaction comprising bifunctional building block, l-glutamic acid methyl ester. The reaction tolerates structurally diverse carbonyl and isocyanide components providing a robust access to functionalized γ-lactams. Antimicrobial susceptibility testing, including agar well diffusion assay, serial microdilution broth assay, and antibiofilm activity testing, identified a potent compound with antibiofilm activity against Staphylococcus aureus ATCC 6538.
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Affiliation(s)
- Josipa Suć Sajko
- Ruđer Bošković Institute, Division of Organic Chemistry and Biochemistry, Bijenička cesta 54, 10000 Zagreb, Croatia
| | - Vanja Ljoljić Bilić
- Department of Microbiology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Schrottova 39, 10000 Zagreb, Croatia
| | - Ivan Kosalec
- Department of Microbiology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Schrottova 39, 10000 Zagreb, Croatia
| | - Ivanka Jerić
- Ruđer Bošković Institute, Division of Organic Chemistry and Biochemistry, Bijenička cesta 54, 10000 Zagreb, Croatia
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Torregrosa-Chinillach A, Moragues A, Pérez-Furundarena H, Chinchilla R, Gómez-Bengoa E, Guillena G. Enantioselective Michael Addition of Aldehydes to Maleimides Organocatalyzed by a Chiral Primary Amine-Salicylamide. Molecules 2018; 23:molecules23123299. [PMID: 30545145 PMCID: PMC6320823 DOI: 10.3390/molecules23123299] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 12/05/2018] [Accepted: 12/09/2018] [Indexed: 11/04/2022] Open
Abstract
A primary amine-salicylamide derived from chiral trans-cyclohexane-1,2-diamine was used as an organocatalyst for the enantioselective conjugate addition of aldehydes, mainly α,α-disubstituted to N-substituted maleimides. The reaction was performed in toluene as a solvent at room temperature. The corresponding enantioenriched adducts were obtained with high yields and enantioselectivities up to 94%. Theoretical calculations were used to justify the stereoinduction.
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Affiliation(s)
- Alejandro Torregrosa-Chinillach
- Departamento de Química Orgánica, Facultad de Ciencias, and Instituto de Síntesis Orgánica (ISO), Uni-versidad de Alicante, Apdo. 99, 03080 Alicante, Spain.
| | - Adrien Moragues
- Departamento de Química Orgánica, Facultad de Ciencias, and Instituto de Síntesis Orgánica (ISO), Uni-versidad de Alicante, Apdo. 99, 03080 Alicante, Spain.
| | - Haritz Pérez-Furundarena
- Departamento de Química Orgánica I, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain.
| | - Rafael Chinchilla
- Departamento de Química Orgánica, Facultad de Ciencias, and Instituto de Síntesis Orgánica (ISO), Uni-versidad de Alicante, Apdo. 99, 03080 Alicante, Spain.
| | - Enrique Gómez-Bengoa
- Departamento de Química Orgánica I, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain.
| | - Gabriela Guillena
- Departamento de Química Orgánica, Facultad de Ciencias, and Instituto de Síntesis Orgánica (ISO), Uni-versidad de Alicante, Apdo. 99, 03080 Alicante, Spain.
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Lombardi C, Artuso E, Grandi E, Lolli M, Spyrakis F, Priola E, Prandi C. Recent advances in the synthesis of analogues of phytohormones strigolactones with ring-closing metathesis as a key step. Org Biomol Chem 2018; 15:8218-8231. [PMID: 28880031 DOI: 10.1039/c7ob01917c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In this paper, we synthesized and evaluated the biological activity of structural analogues of natural strigolactones in which the butenolide D-ring has been replaced with a γ-lactam. The key step to obtain the α,β-unsaturated-γ-lactam was an RCM on suitably substituted amides. Strigolactones (SLs) are plant hormones with various developmental functions. As soil signaling chemicals, they are required for establishing beneficial mycorrhizal plant/fungus symbiosis. Beside these auxinic roles, recently SLs have been successfully investigated as antitumoral agents. Peculiar to the SL perception system is the enzymatic activity of the hormone receptor. SARs data have shown that the presence of the butenolide D-ring is crucial to retain the biological activity. The substitution of the butenolide with a lactam might shed light on the mechanism of perception. In the following, a dedicated in silico study suggested the binding modes of the synthesized compounds to the receptor of SLs in plants.
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Affiliation(s)
- Chiara Lombardi
- Department of Chemistry, University of Turin, via P. Giuria 7 10125, Turin, Italy.
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Kochetkov SV, Kucherenko AS, Zlotin SG. Asymmetric Michael addition of aldehydes to maleimides in primary amine-based aqueous ionic liquid-supported recyclable catalytic system. MENDELEEV COMMUNICATIONS 2017. [DOI: 10.1016/j.mencom.2017.09.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Copper-Catalyzed Intermolecular Aminoalkylation of Alkenes with α-Bromoalkyl Esters and Amines toward Pyrrolidin-2-ones. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700365] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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11
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Flores-Ferrándiz J, Chinchilla R. Organocatalytic enantioselective conjugate addition of aldehydes to maleimides in deep eutectic solvents. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2016.12.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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12
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Chu S, Liu S, Duan W, Cheng Y, Jiang X, Zhu C, Tang K, Wang R, Xu L, Wang X, Yu X, Wu K, Wang Y, Wang M, Huang H, Zhang J. The anti-dementia drug candidate, (−)-clausenamide, improves memory impairment through its multi-target effect. Pharmacol Ther 2016; 162:179-87. [DOI: 10.1016/j.pharmthera.2016.01.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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13
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Fang J, Chang C, Gopula B, Kuo T, Wu P, Henschke JP, Wu H. Rhodium‐Catalyzed Enantioselective Arylation of
N
‐Substituted α,β‐Unsaturated γ‐Lactams: Preparation of Chiral 4‐Aryl‐2‐Pyrrolidones. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600032] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jo‐Hsuan Fang
- Department of Chemistry and Instrumentation CenterNational Taiwan Normal University No. 88, Section 4, Tingzhou Road Taipei 11677, ROC Taiwan
| | - Chiung‐An Chang
- Department of Chemistry and Instrumentation CenterNational Taiwan Normal University No. 88, Section 4, Tingzhou Road Taipei 11677, ROC Taiwan
| | - Balraj Gopula
- Department of Chemistry and Instrumentation CenterNational Taiwan Normal University No. 88, Section 4, Tingzhou Road Taipei 11677, ROC Taiwan
| | - Ting‐Shen Kuo
- Department of Chemistry and Instrumentation CenterNational Taiwan Normal University No. 88, Section 4, Tingzhou Road Taipei 11677, ROC Taiwan
| | - Ping‐Yu Wu
- Department of Exploratory ResearchScinoPharm Taiwan No. 1, Nanke Eighth Road, Tainan Science Industrial Park, Shan-Hua Tainan 74144, ROC Taiwan
| | - Julian P. Henschke
- Department of Exploratory ResearchScinoPharm Taiwan No. 1, Nanke Eighth Road, Tainan Science Industrial Park, Shan-Hua Tainan 74144, ROC Taiwan
| | - Hsyueh‐Liang Wu
- Department of Chemistry and Instrumentation CenterNational Taiwan Normal University No. 88, Section 4, Tingzhou Road Taipei 11677, ROC Taiwan
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Shen DY, Nguyen TN, Wu SJ, Shiao YJ, Hung HY, Kuo PC, Kuo DH, Thang TD, Wu TS. γ- and δ-Lactams from the Leaves of Clausena lansium. JOURNAL OF NATURAL PRODUCTS 2015; 78:2521-2530. [PMID: 26523463 DOI: 10.1021/acs.jnatprod.5b00148] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Eight new clausenamides, including three γ-lactams (1-3), four δ-lactams (4-7), and an amide (8), and seven known lactams, including compounds 9-11, which were purified from natural sources for the first time, were characterized from the leaves of Clausena lansium. Their structures were elucidated using spectroscopic methods, and the absolute configurations were determined using electronic circular dichroism and single-crystal X-ray diffraction analyses with Cu Kα radiation. Compound 2 (50 μM) protected 22.24% of cortical neurons against Aβ25-35-induced cell death.
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Affiliation(s)
| | - Thi Ngan Nguyen
- Department of Chemistry, Vinh University , Vinh City, Vietnam
| | - Shwu-Jen Wu
- Department of Medical Laboratory Science and Biotechnology, Chung Hwa University of Medical Technology , Tainan 71703, Taiwan
| | - Young-Ji Shiao
- Division of Basic Chinese Medicine, National Research Institute of Chinese Medicine , Taipei 112, Taiwan
| | | | - Ping-Chung Kuo
- Department of Biotechnology, National Formosa University , Yunlin 63201, Taiwan
| | - Daih-Huang Kuo
- Department of Pharmacy and Graduate Institute of Pharmaceutical Technology, Tajen University , Pingtung 90741, Taiwan
| | - Tran Dinh Thang
- Department of Chemistry, Vinh University , Vinh City, Vietnam
| | - Tian-Shung Wu
- Department of Pharmacy and Graduate Institute of Pharmaceutical Technology, Tajen University , Pingtung 90741, Taiwan
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Flores-Ferrándiz J, Fiser B, Gómez-Bengoa E, Chinchilla R. Solvent-Induced Reversal of Enantioselectivity in the Synthesis of Succinimides by the Addition of Aldehydes to Maleimides Catalysed by Carbamate-Monoprotected 1,2-Diamines. European J Org Chem 2015. [DOI: 10.1002/ejoc.201403415] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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16
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Halimehjani AZ, Namboothiri INN, Hooshmand SE. Part I: Nitroalkenes in the synthesis of heterocyclic compounds. RSC Adv 2014. [DOI: 10.1039/c4ra08828j] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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17
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Flores-Ferrándiz J, Chinchilla R. Solvent-dependent enantioswitching in the Michael addition of α,α-disubstituted aldehydes to maleimides organocatalyzed by mono-N-Boc-protected cyclohexa-1,2-diamines. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.06.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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18
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Avila A, Chinchilla R, Gómez-Bengoa E, Nájera C. Enantioselective Michael addition of aldehydes to maleimides organocatalysed by chiral 1,2-diamines: an experimental and theoretical study. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.tetasy.2013.10.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Avila A, Chinchilla R, Gómez-Bengoa E, Nájera C. Enantioselective Synthesis of Succinimides by Michael Addition of Aldehydes to Maleimides Organocatalyzed by Chiral Primary Amine-Guanidines. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300492] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Alonso C, González M, Fuertes M, Rubiales G, Ezpeleta JM, Palacios F. Synthesis of Fluorinated β-Aminophosphonates and γ-Lactams. J Org Chem 2013; 78:3858-66. [DOI: 10.1021/jo400281e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Concepción Alonso
- Departamento de Quı́mica Orgánica I and Centro
de Investigacion Lascaray (Lascaray Research Center) and ‡Departamento de Fı́sica
Aplicada, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria, Spain
| | - Marı́a González
- Departamento de Quı́mica Orgánica I and Centro
de Investigacion Lascaray (Lascaray Research Center) and ‡Departamento de Fı́sica
Aplicada, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria, Spain
| | - Marı́a Fuertes
- Departamento de Quı́mica Orgánica I and Centro
de Investigacion Lascaray (Lascaray Research Center) and ‡Departamento de Fı́sica
Aplicada, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria, Spain
| | - Gloria Rubiales
- Departamento de Quı́mica Orgánica I and Centro
de Investigacion Lascaray (Lascaray Research Center) and ‡Departamento de Fı́sica
Aplicada, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria, Spain
| | - Jose Marı́a Ezpeleta
- Departamento de Quı́mica Orgánica I and Centro
de Investigacion Lascaray (Lascaray Research Center) and ‡Departamento de Fı́sica
Aplicada, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria, Spain
| | - Francisco Palacios
- Departamento de Quı́mica Orgánica I and Centro
de Investigacion Lascaray (Lascaray Research Center) and ‡Departamento de Fı́sica
Aplicada, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria, Spain
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Fenster E, Hill D, Reiser O, Aubé J. Automated three-component synthesis of a library of γ-lactams. Beilstein J Org Chem 2012; 8:1804-13. [PMID: 23209515 PMCID: PMC3511015 DOI: 10.3762/bjoc.8.206] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 09/12/2012] [Indexed: 12/14/2022] Open
Abstract
A three-component method for the synthesis of γ-lactams from commercially available maleimides, aldehydes, and amines was adapted to parallel library synthesis. Improvements to the chemistry over previous efforts include the optimization of the method to a one-pot process, the management of by-products and excess reagents, the development of an automated parallel sequence, and the adaption of the method to permit the preparation of enantiomerically enriched products. These efforts culminated in the preparation of a library of 169 γ-lactams.
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Affiliation(s)
- Erik Fenster
- Center of Excellence in Chemical Methodologies and Library Development, the University of Kansas, 2034 Becker Drive, Lawrence Kansas, 66047, USA
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22
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Dai X, Huang P. A Short and Flexible Synthetic Approach to the Naturally Occurring Racemic Neoclausenamide and Its Analogs. CHINESE J CHEM 2012. [DOI: 10.1002/cjoc.201200660] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ning N, Sun J, Du G, Han N, Zhang J, Chen N. (+)-epi-Clausenamide, but not (−)-epi-clausenamide, showed more potential than (−)-clausenamide on facilitating synaptic transmission in CA1 region of hippocampal synapses. Neurosci Lett 2012; 523:99-103. [DOI: 10.1016/j.neulet.2012.06.049] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Revised: 05/03/2012] [Accepted: 06/19/2012] [Indexed: 11/28/2022]
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Ning N, Hu JF, Sun JD, Han N, Zhang JT, Chen NH. (−)Clausenamide facilitates synaptic transmission at hippocampal Schaffer collateral-CA1 synapses. Eur J Pharmacol 2012; 682:50-5. [DOI: 10.1016/j.ejphar.2012.02.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Revised: 02/02/2012] [Accepted: 02/08/2012] [Indexed: 10/28/2022]
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Roy S, Reiser O. Katalytische Mehrkomponentenreaktionen zur stereoselektiven Synthese voncis-4,5-disubstituierten Pyrrolidinonen und Tetrahydro-3H-pyrrolo[3,2-c]chinolinen. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201107831] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Roy S, Reiser O. A catalytic multicomponent approach for the stereoselective synthesis of cis-4,5-disubstituted pyrrolidinones and tetrahydro-3H-pyrrolo[3,2-c]quinolines. Angew Chem Int Ed Engl 2012; 51:4722-5. [PMID: 22461239 DOI: 10.1002/anie.201107831] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Indexed: 11/11/2022]
Affiliation(s)
- Sudipta Roy
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
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Cooperative catalysis by carbenes and Lewis acids in a highly stereoselective route to gamma-lactams. Nat Chem 2010; 2:766-71. [PMID: 20729898 PMCID: PMC2928160 DOI: 10.1038/nchem.727] [Citation(s) in RCA: 335] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Accepted: 05/21/2010] [Indexed: 12/13/2022]
Abstract
Enzymes are a continuing source of inspiration for the design of new chemical reactions that proceed with efficiency, high selectivity and minimal waste. In many biochemical processes, different catalytic species, such as Lewis acids and bases, are involved in precisely orchestrated interactions to activate reactants simultaneously or sequentially. Employing this type of cooperative catalysis, in which two or more catalytic cycles operate concurrently to achieve one overall transformation, has great potential to enhance known reactivity and drive the development of new chemical reactions with high value. In this disclosure, a cooperative N-heterocyclic carbene/Lewis acid catalytic system promotes the addition of homoenolate equivalents to hydrazones generating highly substituted γ-lactams in moderate to good yields and high levels of diastereo- and enantioselectivity.
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Song W, Lu W, Wang J, Lu P, Wang Y. A Facile Route to γ-Nitro Imidates via Four-Component Reaction of Alkynes with Sulfonyl Azides, Alcohols, and Nitroolefins. J Org Chem 2010; 75:3481-3. [DOI: 10.1021/jo100354h] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wangze Song
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Wei Lu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Jing Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Ping Lu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Yanguang Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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Lettan RB, Galliford CV, Woodward CC, Scheidt KA. Amide Enolate Additions to Acylsilanes: In Situ Generation of Unusual and Stereoselective Homoenolate Equivalents. J Am Chem Soc 2009; 131:8805-14. [DOI: 10.1021/ja808811u] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robert B. Lettan
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208
| | - Chris V. Galliford
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208
| | - Chase C. Woodward
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208
| | - Karl A. Scheidt
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208
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Synthesis and activity in enhancing long-term potentiation (LTP) of clausenamide stereoisomers. Bioorg Med Chem Lett 2009; 19:2112-5. [DOI: 10.1016/j.bmcl.2009.03.018] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2009] [Revised: 03/02/2009] [Accepted: 03/05/2009] [Indexed: 11/23/2022]
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Lettan R, Woodward C, Scheidt K. Highly Stereoselective Synthesis of Substituted γ-Lactams from Acylsilanes. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200705229] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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32
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Lettan R, Woodward C, Scheidt K. Highly Stereoselective Synthesis of Substituted γ-Lactams from Acylsilanes. Angew Chem Int Ed Engl 2008; 47:2294-7. [DOI: 10.1002/anie.200705229] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Xu L, Wang XY, Liu SL, Zhang JT. Two forms of long-term potentiation induced by different compounds. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2007; 9:217-22. [PMID: 17566913 DOI: 10.1080/10286020500532066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The purpose of this study was to investigate different forms of long-term potentiation (LTP) induced by different compounds. As shown in results, the influx of calcium via voltage-dependent calcium channels (VDCCs) was responsible for ( - )-clausenamide-induced LTP in hippocampus, while Rg1 induced LTP is mediated by the entry of calcium via N-methyl-d-aspartate glutamate (NMDA) receptor. The findings in the present study provide pharmacological basis for the nootropic mechanisms of these two compounds.
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Affiliation(s)
- L Xu
- Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
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Zhu XZ, Li XY, Liu J. Recent pharmacological studies on natural products in China. Eur J Pharmacol 2005; 500:221-30. [PMID: 15464035 DOI: 10.1016/j.ejphar.2004.07.027] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/01/2004] [Indexed: 11/28/2022]
Abstract
Natural products have been used as medicinal agents for many years. In addition, these compounds have also served as the starting points for semisynthetic analogs with improved properties. This review focuses on recent advances in the pharmacological studies on natural products mainly performed and published in China. Emphasis will be placed on those compounds that show the greatest promise clinically such as huperzine A (9-amino-13-ethylidene-11-methyl-4-azatricyclo[7.3.1.0(3.8)]trideca-3(8),6,11-trien-5-one), s-(-)-3-n-butylphthalide (s-(-)-3-butyl-1(3H)-isobenzofuranone), (-)-clausenamide (3-hydroxy-4-phenyl-5a-hydroxybenzyl-N-methyl-gamma-lactam) and Ginkgo biloba extract and its active components.
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Affiliation(s)
- Xing Zu Zhu
- Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences. 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201203, China.
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Xu L, Liu SL, Zhang JT. (?)-Clausenamide potentiates synaptic transmission in the dentate gyrus of rats. Chirality 2005; 17:239-44. [PMID: 15841477 DOI: 10.1002/chir.20150] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The effect of clausenamide on synaptic transmission in the dentate gyrus of rats in vivo and its possible mechanism of action were investigated in this study. Four of 16 enantiomers showed potentiating effects on basal synaptic transmission in anesthetized animals. By comparing one pair of enantiomers, (-)-clausenamide and (+)-clausenamide, we can report three primary findings: (1) (-)-clausenamide potentiated synaptic transmission in both anesthetized and freely moving animals while (+)-clausenamide showed no or little effect; (2) (-)-clausenamide increased the magnitude of long-term potentiation (LTP) induced by high-frequency stimulation (HFS) in anesthetized animals whereas (+)-clausenamide had no effect; (3) voltage-dependent calcium channels (VDCCs) calcineurin and calpain are involved in (-)-clausenamide-induced potentiation of synaptic transmission. Because hippocampal LTP is thought to reflect a cellular mechanism involved in learning and memory, our findings may provide the pharmacological basis for understanding the nootropic mechanisms of (-)-clausenamide, which is the first chiral nootropic agent developed in China.
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Affiliation(s)
- Lin Xu
- Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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36
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Tang K, Zhang JT. Mechanism of (−)clausenamide induced calcium transient in primary culture of rat cortical neurons. Life Sci 2004; 74:1427-34. [PMID: 14706573 DOI: 10.1016/j.lfs.2003.08.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
(-)clausenamide is a compound isolated from Clausena lansium (lour) Skeel with nootropic effects. At the present study, we investigated the clausenamide induced Ca2+ signaling in primary cultures of rat cortical neurons by using laser confocal microscopy. The mean amplitude of (-)clausenamide (1 microM) induced Ca2+ transient was similar in extracellular solution with or without calcium; and (-)clausenamide failed to trigger calcium transient after treatment with endoplasmic reticulum Ca2+ pumps inhibitor BHQ to exhaust intracellular Ca2+ stores. This result suggested that the primary source of (-)clausenamide induced Ca2+ transient was from internal stores. Application of IP3 receptor inhibitor MgCl2 and PLC-gamma inhibitor U73122 suppressed (-)clausenamide induced Ca2+ transient, suggesting that the major source of (-)clausenamide induced Ca2+ transient was from IP3 receptor pathway. We also found that mitochondria were involved in (-)clausenamide triggered Ca2+ transient. The distinctive spatial and temporal characteristic of (-)clausenamide induced Ca2+ transient may play an important role in its action.
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Affiliation(s)
- Kang Tang
- Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
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