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Li QZ, Hou SH, Kang JC, Lian PF, Hao Y, Chen C, Zhou J, Ding TM, Zhang SY. Bioinspired Palladium-Catalyzed Intramolecular C(sp 3 )-H Activation for the Collective Synthesis of Proline Natural Products. Angew Chem Int Ed Engl 2022; 61:e202207088. [PMID: 35751877 DOI: 10.1002/anie.202207088] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Indexed: 12/18/2022]
Abstract
Bioinspired palladium-catalyzed intramolecular cyclization of amino acid derivatives containing a vinyl iodide moiety by C-H activation enabled rapid access to a wide range of functionalized proline derivatives with an exocyclic olefin. To demonstrate the practicality of this methodology, the functionalized prolines were used as intermediates for the synthesis of several natural products: lucentamycin A, oxotomaymycin, oxoprothracarcin, and barmumycin.
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Affiliation(s)
- Quan-Zhe Li
- Shanghai Key Laboratory for Molecular Engineer of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.,School of Pharmaceutical Sciences, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Si-Hua Hou
- Shanghai Key Laboratory for Molecular Engineer of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.,School of Pharmaceutical Sciences, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Jun-Chen Kang
- Shanghai Key Laboratory for Molecular Engineer of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Peng-Fei Lian
- Shanghai Key Laboratory for Molecular Engineer of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Yu Hao
- Shanghai Key Laboratory for Molecular Engineer of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Chao Chen
- Shanghai Key Laboratory for Molecular Engineer of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Jia Zhou
- Shanghai Key Laboratory for Molecular Engineer of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Tong-Mei Ding
- Shanghai Key Laboratory for Molecular Engineer of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Shu-Yu Zhang
- Shanghai Key Laboratory for Molecular Engineer of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
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2
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Li QZ, Hou SH, Kang JC, Lian PF, Hao Y, Chen C, Zhou J, Ding TM, Zhang SY. Bioinspired Palladium‐Catalyzed Intramolecular C(sp3)−H Activation for the Collective Synthesis of Proline Natural Products. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Quan-Zhe Li
- Shanghai Jiao Tong University Chemistry CHINA
| | - Si-Hua Hou
- SJTU: Shanghai Jiao Tong University CHEMISTRY CHINA
| | | | | | - Yu Hao
- SJTU: Shanghai Jiao Tong University Chemistry CHINA
| | - Chao Chen
- SJTU: Shanghai Jiao Tong University Chemistry CHINA
| | - Jia Zhou
- SJTU: Shanghai Jiao Tong University Chemistry CHINA
| | | | - Shu-Yu Zhang
- Shanghai Jiao Tong University School of Chemistry and Chemical Engineering 800 Dongchuan RoadB329 Chemsitry BuildingShanghai Jiao Tong University 200240 Shanghai CHINA
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3
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Perry CK, Fulton MG, Lindsley CW. Total synthesis of violaceimides A–E and consideration of the reported stereochemistry. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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4
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Kaur N, Verma Y, Grewal P, Bhardwaj P, Devi M. Application of titanium catalysts for the syntheses of heterocycles. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1606922] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Yamini Verma
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Pooja Grewal
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Pranshu Bhardwaj
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Meenu Devi
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
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5
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Cullia G, Bruno S, Parapini S, Margiotta M, Tamborini L, Pinto A, Galbiati A, Mozzarelli A, Persico M, Paladino A, Fattorusso C, Taramelli D, Conti P. Covalent Inhibitors of Plasmodium falciparum Glyceraldehyde 3-Phosphate Dehydrogenase with Antimalarial Activity in Vitro. ACS Med Chem Lett 2019; 10:590-595. [PMID: 30996801 DOI: 10.1021/acsmedchemlett.8b00592] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 02/20/2019] [Indexed: 12/25/2022] Open
Abstract
Covalent inhibitors of PfGAPDH characterized by a 3-bromoisoxazoline warhead were developed, and their mode of interaction with the target enzyme was interpreted by means of molecular modeling studies: some of them displayed a submicromolar antiplasmodial activity against both chloroquine sensitive and resistant strains of Plasmodium falciparum, with good selectivity indices.
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Affiliation(s)
- Gregorio Cullia
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli 25, 20133 Milano, Italy
| | - Stefano Bruno
- Dipartimento di Scienze degli Alimenti e del Farmaco, Università degli Studi di Parma, Area Parco delle Scienze 23A, 43124 Parma, Italy
| | - Silvia Parapini
- Dipartimento di Scienze Biomediche, Chirurgiche e Odontoiatriche, Università degli Studi di Milano, Via Pascal 36, 20133 Milano, Italy
| | - Marilena Margiotta
- Dipartimento di Scienze degli Alimenti e del Farmaco, Università degli Studi di Parma, Area Parco delle Scienze 23A, 43124 Parma, Italy
| | - Lucia Tamborini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli 25, 20133 Milano, Italy
| | - Andrea Pinto
- Dipartimento di Scienze per gli Alimenti, la Nutrizione e l’Ambiente, Via Celoria 2, 20133 Milano, Italy
| | - Andrea Galbiati
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli 25, 20133 Milano, Italy
| | - Andrea Mozzarelli
- Dipartimento di Scienze degli Alimenti e del Farmaco, Università degli Studi di Parma, Area Parco delle Scienze 23A, 43124 Parma, Italy
| | - Marco Persico
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, 80131 Napoli, Italy
| | - Antonella Paladino
- Istituto di Chimica del Riconoscimento Molecolare, Consiglio Nazionale delle Ricerche, Via M. Bianco 9, 20131 Milano, Italy
| | - Caterina Fattorusso
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, 80131 Napoli, Italy
| | - Donatella Taramelli
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Pascal 36, 20133 Milano, Italy
| | - Paola Conti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli 25, 20133 Milano, Italy
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7
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Takahashi K, Fukushima K, Tsubuki M, Honda T. The formal synthesis of lucentamycin A: Construction of cis -2,3-disubstituted pyrrolidine core by application of SmI 2 -DMPU system. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.02.076] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Patel BA, Abel B, Barbuti AM, Velagapudi UK, Chen ZS, Ambudkar SV, Talele TT. Comprehensive Synthesis of Amino Acid-Derived Thiazole Peptidomimetic Analogues to Understand the Enigmatic Drug/Substrate-Binding Site of P-Glycoprotein. J Med Chem 2018; 61:834-864. [PMID: 29251928 DOI: 10.1021/acs.jmedchem.7b01340] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel set of 64 analogues based on our lead compound 1 was designed and synthesized with an initial objective of understanding the structural requirements of ligands binding to a highly perplexing substrate-binding site of P-glycoprotein (P-gp) and their effect on modulating the ATPase function of the efflux pump. Compound 1, a stimulator of P-gp ATPase activity, was transformed to ATPase inhibitory compounds 39, 53, and 109. The ATPase inhibition by these compounds was predominantly contributed by the presence of a cyclohexyl group in lieu of the 2-aminobenzophenone moiety of 1. The 4,4-difluorocyclohexyl analogues, 53 and 109, inhibited the photolabeling by [125I]-IAAP, with IC50 values of 0.1 and 0.76 μM, respectively. Selected compounds were shown to reverse paclitaxel resistance in HEK293 cells overexpressing P-gp and were selective toward P-gp over CYP3A4. Induced-fit docking highlighted a plausible binding pattern of inhibitory compounds in the putative-binding pocket of P-gp. The current study underscores the stringent requirement by P-gp to bind to chemically similar molecules.
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Affiliation(s)
- Bhargav A Patel
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University , Queens, New York 11439, United States
| | - Biebele Abel
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health , Bethesda, Maryland 20892, United States
| | - Anna Maria Barbuti
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University , Queens, New York 11439, United States
| | - Uday Kiran Velagapudi
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University , Queens, New York 11439, United States
| | - Zhe-Sheng Chen
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University , Queens, New York 11439, United States
| | - Suresh V Ambudkar
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health , Bethesda, Maryland 20892, United States
| | - Tanaji T Talele
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University , Queens, New York 11439, United States
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9
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α-Amino acids with electrically charged and polar uncharged side chains as chiral synthon: Application to the synthesis of bioactive alkaloids (1996-Dec, 2013). Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.02.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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10
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Bennur T, Ravi Kumar A, Zinjarde S, Javdekar V. Nocardiopsis
species: a potential source of bioactive compounds. J Appl Microbiol 2015; 120:1-16. [DOI: 10.1111/jam.12950] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 06/16/2015] [Accepted: 07/07/2015] [Indexed: 12/12/2022]
Affiliation(s)
- T. Bennur
- Institute of Bioinformatics and Biotechnology; Savitribai Phule Pune University; Pune India
| | - A. Ravi Kumar
- Institute of Bioinformatics and Biotechnology; Savitribai Phule Pune University; Pune India
| | - S.S. Zinjarde
- Institute of Bioinformatics and Biotechnology; Savitribai Phule Pune University; Pune India
| | - V. Javdekar
- Department of Biotechnology; Abasaheb Garware College; Pune India
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12
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Ranatunga S, Tang CHA, Hu CCA, Del Valle JR. Total synthesis and structural revision of lucentamycin A. J Org Chem 2012; 77:9859-64. [PMID: 23039096 DOI: 10.1021/jo301723y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lucentamycin A is a marine-derived peptide natural product harboring a unique 4-ethylidene-3-methylproline (Emp) subunit. The proposed structure of lucentamycin A and the core Emp residue have recently been called into question through synthesis. Here, we report the first total synthesis of lucentamycin A, which confirms that the ethylidene substituent in Emp bears an E geometry, in contrast to the originally assigned Z configuration. Synthesis of the desired (E)-Emp subunit required the implementation of a novel strategy starting from Garner's aldehyde.
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Affiliation(s)
- Sujeewa Ranatunga
- Drug Discovery Department, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida 33612, United States
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13
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Selim KB, Lee BK, Sim T. Stereoselective total synthesis of the E-isomer of putative lucentamycin A. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.08.092] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Cha JW, Park JS, Sim T, Nam SJ, Kwon HC, Del Valle JR, Fenical W. Structure assignment of lucentamycin E and revision of the olefin geometries of the marine-derived lucentamycins. JOURNAL OF NATURAL PRODUCTS 2012; 75:1648-1651. [PMID: 22953793 PMCID: PMC3689542 DOI: 10.1021/np3003854] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A new lucentamycin analogue, lucentamycin E (5), was isolated from the culture broth of the marine-derived actinomycete Nocardiopsis lucentensis, strain CNR-712. The absolute stereostructure of 5 was assigned by comprehensive analyses of NMR data and by application of the advanced Marfey's method. The planar structure of 5 was analogous to lucentamycins A-D, whereas the olefin geometry of the 3-methyl-4-ethylideneproline moiety was found to be E, opposite of that previously reported. Consequently, a reinvestigation of the olefin geometries of the 3-methyl-4-ethylideneproline residues of lucentamycins A-D showed that the olefin geometries of the substituted proline functionalities must be revised to (2S,3R,E)-3-methyl-4-ethylideneproline.
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Affiliation(s)
- Jin Wook Cha
- Natural Medicine Center, Korea Institute of Science and Technology, Gangneung, Gangwon-do 210–340, Republic of Korea
| | - Jin-Soo Park
- Natural Medicine Center, Korea Institute of Science and Technology, Gangneung, Gangwon-do 210–340, Republic of Korea
| | - Taebo Sim
- Korea Institute of Science and Technology, Cheongryang, Seoul 130–650, Republic of Korea
| | - Sang Jip Nam
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0204, USA
| | - Hak Cheol Kwon
- Natural Medicine Center, Korea Institute of Science and Technology, Gangneung, Gangwon-do 210–340, Republic of Korea
| | - Juan R. Del Valle
- Drug Discovery Department, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida 33612, USA
| | - William Fenical
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0204, USA
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15
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Ham YJ, Yu H, Kim ND, Hah JM, Selim KB, Choi HG, Sim T. Rhodium-catalyzed reductive cyclization of 1,6-enynes and stereoselective synthesis of the putative structure of lucentamycin A and its stereoisomers. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.12.075] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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16
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Shi C, Geders TW, Park SW, Wilson DJ, Boshoff HI, Orisadipe A, Barry CE, Schnappinger D, Finzel BC, Aldrich CC. Mechanism-based inactivation by aromatization of the transaminase BioA involved in biotin biosynthesis in Mycobaterium tuberculosis. J Am Chem Soc 2011; 133:18194-201. [PMID: 21988601 PMCID: PMC3222238 DOI: 10.1021/ja204036t] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
BioA catalyzes the second step of biotin biosynthesis, and this enzyme represents a potential target to develop new antitubercular agents. Herein we report the design, synthesis, and biochemical characterization of a mechanism-based inhibitor (1) featuring a 3,6-dihydropyrid-2-one heterocycle that covalently modifies the pyridoxal 5'-phosphate (PLP) cofactor of BioA through aromatization. The structure of the PLP adduct was confirmed by MS/MS and X-ray crystallography at 1.94 Å resolution. Inactivation of BioA by 1 was time- and concentration-dependent and protected by substrate. We used a conditional knock-down mutant of M. tuberculosis to demonstrate the antitubercular activity of 1 correlated with BioA expression, and these results provide support for the designed mechanism of action.
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Affiliation(s)
- Ce Shi
- Center for Drug Design, Academic Health Center, University of Minnesota, MN, 55455, United States
| | - Todd W. Geders
- Department of Medicinal Chemistry, University of Minnesota, MN, 55455, United States
| | - Sae Woong Park
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, NY, 10065, United States
| | - Daniel J. Wilson
- Center for Drug Design, Academic Health Center, University of Minnesota, MN, 55455, United States
| | - Helena I. Boshoff
- Tuberculosis Research Section, National Institute of Allergy and Infectious Diseases, Bethesda, MD, 20892, United States
| | - Abayomi Orisadipe
- Tuberculosis Research Section, National Institute of Allergy and Infectious Diseases, Bethesda, MD, 20892, United States
| | - Clifton E. Barry
- Tuberculosis Research Section, National Institute of Allergy and Infectious Diseases, Bethesda, MD, 20892, United States
| | - Dirk Schnappinger
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, NY, 10065, United States
| | - Barry C. Finzel
- Department of Medicinal Chemistry, University of Minnesota, MN, 55455, United States
| | - Courtney C. Aldrich
- Center for Drug Design, Academic Health Center, University of Minnesota, MN, 55455, United States
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Brogan JT, Stoops SL, Crews BC, Marnett LJ, Lindsley CW. Total Synthesis (+)-7-Bromotrypargine and Unnatural Analogs: Biological Evaluation Uncovers Activity at CNS Targets of Therapeutic Relevance. ACS Chem Neurosci 2011; 2:633-639. [PMID: 22247792 PMCID: PMC3254090 DOI: 10.1021/cn200075n] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Accepted: 08/12/2011] [Indexed: 11/28/2022] Open
Abstract
The first total synthesis of (+)-7-bromotrypargine, a β-carboline alkaloid from Ancornia sp. is reported. The synthesis proceeds in 9 steps, 8 steps longest linear sequence, in 36.9% overall yield. Biological characterization found that (+)-7-bromotrypargine is an H(3) antagonist, and a selective inhibitor of DAT and NET, without inhibiting SERT. Moreover, unlike electron rich congeners, (+)-7-bromotrypargine is not cytotoxic, and thus represents an attractive starting point for chemical optimization; therefore, we piloted a number of chemistries for the synthesis of unnatural analogs.
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Affiliation(s)
- John T. Brogan
- Department of Pharmacology, Vanderbilt Center for Neuroscience Drug Discovery, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States
- Department of Chemistry, Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee, 37232, United States
| | - Sydney L. Stoops
- Department of Pharmacology, Vanderbilt Center for Neuroscience Drug Discovery, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States
| | - Brenda C. Crews
- Department of Chemistry, Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee, 37232, United States
| | - Lawrence J. Marnett
- Department of Pharmacology, Vanderbilt Center for Neuroscience Drug Discovery, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States
- Department of Chemistry, Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee, 37232, United States
| | - Craig W. Lindsley
- Department of Pharmacology, Vanderbilt Center for Neuroscience Drug Discovery, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States
- Department of Chemistry, Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee, 37232, United States
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Ranatunga S, Kim JS, Pal U, Del Valle JR. An Ester Enolate–Claisen Rearrangement Route to Substituted 4-Alkylideneprolines. Studies toward a Definitive Structural Revision of Lucentamycin A. J Org Chem 2011; 76:8962-76. [DOI: 10.1021/jo201727g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Sujeewa Ranatunga
- Drug Discovery Department, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida 33612, United
States
- Department of Chemistry
and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003, United States
| | - Jinsoo S. Kim
- Drug Discovery Department, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida 33612, United
States
| | - Ujjwal Pal
- Drug Discovery Department, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida 33612, United
States
| | - Juan R. Del Valle
- Drug Discovery Department, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida 33612, United
States
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The 2-(Triphenylsilyl)ethoxycarbonyl-(“Tpseoc”-) Group: A New Silicon-Based, Fluoride Cleavable Oxycarbonyl Protecting Group Highly Orthogonal to the Boc-, Fmoc- and Cbz-Groups. Molecules 2011; 16:4695-718. [PMID: 21654577 PMCID: PMC6264494 DOI: 10.3390/molecules16064695] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2011] [Revised: 05/30/2011] [Accepted: 05/31/2011] [Indexed: 11/23/2022] Open
Abstract
Starting from 2-(triphenylsilyl)ethanol a new oxycarbonyl protecting group cleavable by fluoride ion induced Peterson-elimination has been developed. Known 2-(triphenylsilyl)ethanol has been prepared from commercially available triphenylvinyl-silane by a hydroboration-oxidation sequence using the sterically hindered borane reagent 9-BBN. The silyl alcohol was subsequently transformed into its chloroformate, imidazolylcarboxylic acid ester and p-nitrophenyl carbonate and used in standard protocols for the formation of carbamates and carbonates. The Tpseoc group proved to be highly resistant against acidic conditions applied in removal of tert-butyl esters and the t-Boc-group. It also withstood catalytic hydrogenation, treatment with morpholine, methylhydrazine and Pd-reagents/allyl-scavanger combinations, conditions required to cleave Cbz-, Fmoc-, phthalimide- and Alloc-groups. The Tpseoc-group is cleaved upon treatment with TBAF/CsF at 0 °C or r.t. with cleavage times reaching from <10 min. to 24 h. Its orthogonality, ease of cleavage and UV-detectability makes the Tpseoc-group a promising alternative to other widely used silicon based amine protecting groups like the Teoc- and SES-groups.
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Aldrich LN, Stoops SL, Crews BC, Marnett LJ, Lindsley CW. Total synthesis and biological evaluation of tambjamine K and a library of unnatural analogs. Bioorg Med Chem Lett 2010; 20:5207-11. [DOI: 10.1016/j.bmcl.2010.06.154] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2010] [Revised: 06/29/2010] [Accepted: 06/30/2010] [Indexed: 10/19/2022]
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22
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Berlinck RGS, Burtoloso ACB, Trindade-Silva AE, Romminger S, Morais RP, Bandeira K, Mizuno CM. The chemistry and biology of organic guanidine derivatives. Nat Prod Rep 2010; 27:1871-907. [DOI: 10.1039/c0np00016g] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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