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Bakthadoss M, Mushaf M. Intramolecular [3 + 2] nitrone cycloaddition reaction: highly regio and diastereoselective synthesis of bicyclo[3.2.1]octane scaffolds. Org Biomol Chem 2020; 18:9653-9659. [PMID: 33211791 DOI: 10.1039/d0ob01960g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A regio and diastereoselective strategy has been developed for the synthesis of complex bicyclo[3.2.1]octane scaffolds from the reaction of readily accessible vinylogous carbonates with N-substituted hydroxylamine hydrochlorides via intramolecular 1,3-dipolar nitrone cycloaddition reaction. Wide varieties of bicyclic isoxazolidines were synthesized in high yields under catalyst free conditions through a highly efficient and operationally simple protocol.
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Affiliation(s)
- Manickam Bakthadoss
- Department of Chemistry, Pondicherry University, Pondicherry - 605 014, India.
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2
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Koutová D, Maafi N, Havelek R, Opletal L, Blunden G, Řezáčová M, Cahlíková L. Chemical and Biological Aspects of Montanine-Type Alkaloids Isolated from Plants of the Amaryllidaceae Family. Molecules 2020; 25:molecules25102337. [PMID: 32429491 PMCID: PMC7288066 DOI: 10.3390/molecules25102337] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 05/11/2020] [Accepted: 05/12/2020] [Indexed: 02/02/2023] Open
Abstract
Plants of the Amaryllidaceae family are promising therapeutic tools for human diseases and have been used as alternative medicines. The specific secondary metabolites of this plant family, called Amaryllidaceae alkaloids (AA), have attracted considerable attention due to their interesting pharmacological activities. One of them, galantamine, is already used in the therapy of Alzheimer’s disease as a long acting, selective, reversible inhibitor of acetylcholinesterase. One group of AA is the montanine-type, such as montanine, pancracine and others, which share a 5,11-methanomorphanthridine core. So far, only 14 montanine-type alkaloids have been isolated. Compared with other structural-types of AA, montanine-type alkaloids are predominantly present in plants in low concentrations, but some of them display promising biological properties, especially in vitro cytotoxic activity against different cancerous cell lines. The present review aims to summarize comprehensively the research that has been published on the Amaryllidaceae alkaloids of montanine-type.
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Affiliation(s)
- Darja Koutová
- Department of Medical Biochemistry, Faculty of Medicine in Hradec Králové, Charles University, Šimkova 870, 500 03 Hradec Králové, Czech Republic; (D.K.); (R.H.); (M.Ř.)
| | - Negar Maafi
- ADINACO Research Group, Department of Pharmaceutical Botany, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic; (N.M.); (L.O.)
| | - Radim Havelek
- Department of Medical Biochemistry, Faculty of Medicine in Hradec Králové, Charles University, Šimkova 870, 500 03 Hradec Králové, Czech Republic; (D.K.); (R.H.); (M.Ř.)
| | - Lubomír Opletal
- ADINACO Research Group, Department of Pharmaceutical Botany, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic; (N.M.); (L.O.)
| | - Gerald Blunden
- School of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth, Hampshire P01 2DT, UK;
| | - Martina Řezáčová
- Department of Medical Biochemistry, Faculty of Medicine in Hradec Králové, Charles University, Šimkova 870, 500 03 Hradec Králové, Czech Republic; (D.K.); (R.H.); (M.Ř.)
| | - Lucie Cahlíková
- ADINACO Research Group, Department of Pharmaceutical Botany, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic; (N.M.); (L.O.)
- Correspondence:
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3
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Kovács E, Huszka B, Gáti T, Nyerges M, Faigl F, Mucsi Z. Chemoselective Strategy for the Direct Formation of Tetrahydro-2,5-methanobenzo[ c]azepines or Azetotetrahydroisoquinolines via Regio- and Stereoselective Reactions. J Org Chem 2019; 84:7100-7112. [PMID: 31084024 DOI: 10.1021/acs.joc.9b00798] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The present study reports regio- and highly diastereoselective preparative methods for the synthesis of versatile alkaloid-type compounds from oxiranylmethyl tetrahydroisoquinolines. 2,5-Methanobenzo[ c]azepines or azetidine-fused heterocycles were synthesized in tandem reactions depending on the absence or presence of a BF3 co-reagent. A high functional group tolerance has also been demonstrated. DFT calculations with an explicit solvent model confirmed the proposed reaction mechanisms and the role of kinetic controls on the stereochemical outcome of the reported new methods.
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Affiliation(s)
- Ervin Kovács
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest H-1111 Hungary.,Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences , Hungarian Academy of Sciences , Budapest H-1117 Hungary
| | - Balázs Huszka
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest H-1111 Hungary
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry , Budapest H-1031 Hungary
| | - Miklós Nyerges
- Servier Research Institute of Medicinal Chemistry , Budapest H-1031 Hungary
| | - Ferenc Faigl
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest H-1111 Hungary
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4
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Li J, Ye Y, Zhang Y. Cycloaddition/annulation strategies for the construction of multisubstituted pyrrolidines and their applications in natural product synthesis. Org Chem Front 2018. [DOI: 10.1039/c7qo01077j] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Pyrrolidines are privileged substructures of numerous bioactive natural products and drugs.
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Affiliation(s)
- Jundong Li
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province
- iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Yilin Ye
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province
- iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Yandong Zhang
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province
- iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
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5
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Pandey G, Khamrai J, Mishra A. Generation of All-Carbon Quaternary Stereocenters at the C-3 Carbon of Lactams via [3,3]-Sigmatropic Rearrangement and Revision of Absolute Configuration: Total Synthesis of (−)-Physostigmine. Org Lett 2017; 20:166-169. [DOI: 10.1021/acs.orglett.7b03537] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Ganesh Pandey
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
| | - Jagadish Khamrai
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
| | - Akash Mishra
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
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6
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Yang H, Hou S, Tao C, Liu Z, Wang C, Cheng B, Li Y, Zhai H. Rhodium-Catalyzed Denitrogenative [3+2] Cycloaddition: Access to Functionalized Hydroindolones and the Framework of Montanine-TypeAmaryllidaceaeAlkaloids. Chemistry 2017; 23:12930-12936. [DOI: 10.1002/chem.201702893] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Indexed: 01/25/2023]
Affiliation(s)
- Hongjian Yang
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
| | - Shengtai Hou
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
| | - Cheng Tao
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
| | - Zhao Liu
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
| | - Chao Wang
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
| | - Bin Cheng
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
| | - Yun Li
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
| | - Hongbin Zhai
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Shenzhen Graduate School of Peking University; 518055 P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); 300071 P. R. China
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7
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Pandey G, Mishra A, Khamrai J. Asymmetric Total Synthesis of Eburnamine and Eucophylline: A Biomimetic Attempt for the Total Synthesis of Leucophyllidine. Org Lett 2017; 19:3267-3270. [DOI: 10.1021/acs.orglett.7b01410] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Ganesh Pandey
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
| | - Akash Mishra
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
| | - Jagadish Khamrai
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
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8
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Chen S, Bacauanu V, Knecht T, Mercado BQ, Bergman RG, Ellman JA. New Regio- and Stereoselective Cascades via Unstabilized Azomethine Ylide Cycloadditions for the Synthesis of Highly Substituted Tropane and Indolizidine Frameworks. J Am Chem Soc 2016; 138:12664-70. [PMID: 27642766 DOI: 10.1021/jacs.6b08355] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Multisubstituted tropanes and indolizidines have been prepared with high regio- and stereoselectivity by the [3+2] cycloaddition of unstabilized azomethine ylides generated from readily prepared trimethylsilyl-substituted 1,2-dihydropyridines via protonation or alkylation followed by desilylation. Starting from 1,2-dihydropyridines bearing a ring trimethylsilyl substituent at the 6-position, an intermolecular alkylation/desilylation provides endocyclic unstabilized ylides that successfully undergo cycloaddition with a range of symmetrical and unsymmetrical alkyne and alkene dipolarophiles to afford densely substituted tropanes incorporating quaternary carbons in good yields and with high regio- and stereoselectivity. Additionally, an intramolecular alkylation/desilylation/cycloaddition sequence provides convenient and rapid entry to bridged tricyclic tropane skeletons, allowing for five contiguous carbon stereocenters to be set in a single experimental operation and under mild conditions. Starting from 1,2-dihydropyridines with trimethylsilylmethyl groups on nitrogen, protonation followed by desilylation generates exocyclic unstabilized ylides that undergo cycloaddition with unsymmetrical alkynes to give indolizidines with good regio- and stereoselectivity. N-Trimethylsilylmethyl-1,2-dihydropyridines can also be alkylated and subsequently desilylated to give endocyclic unstabilized ylides that undergo intermolecular cycloadditions with carbonyl compounds to give bicyclic oxazolidine products in good overall yields. Moreover, an intramolecular alkylation/desilylation/cycloaddition sequence with the N-trimethylsilylmethyl-1,2-dihydropyridines affords tricyclic indolizidines that incorporate quaternary carbons and up to five stereocenters with good to excellent regio- and diastereoselectivity.
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Affiliation(s)
- Shuming Chen
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States
| | - Vlad Bacauanu
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States
| | - Tobias Knecht
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States
| | - Brandon Q Mercado
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States
| | - Robert G Bergman
- Division of Chemical Sciences, Lawrence Berkeley National Laboratory, and Department of Chemistry, University of California , Berkeley, California 94720, United States
| | - Jonathan A Ellman
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States
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9
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Pandey G, Khamrai J. Asymmetric Total Synthesis and Structural Elucidation of Unusual Oxindole Alkaloid Leucolusine. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600101] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ganesh Pandey
- Molecular Synthesis and Drug Discovery Laboratory; Centre of Biomedical Research; SGPGIMS Campus Lucknow- 226014 India
| | - Jagadish Khamrai
- Molecular Synthesis and Drug Discovery Laboratory; Centre of Biomedical Research; SGPGIMS Campus Lucknow- 226014 India
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10
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Pandey G, Burugu SK, Singh P. Efficient Strategy for the Construction of Both Enantiomers of the Octahydropyrroloquinolinone Ring System: Total Synthesis of (+)-Aspidospermidine. Org Lett 2016; 18:1558-61. [DOI: 10.1021/acs.orglett.6b00374] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ganesh Pandey
- Molecular
Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
| | - Shiva Kumar Burugu
- Molecular
Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
- Division
of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. Homi
Bhabha Road, Pune 411008, India
| | - Pushpendra Singh
- Molecular
Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
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11
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Pandey G, Khamrai J, Mishra A. An Expeditious Route to Both Enantiomers of All Carbon Quaternary Stereocenters at C-3 Carbon of Lactams via [3,3]-Sigmatropic Rearrangement: Total Synthesis of (−)-Physostigmine. Org Lett 2015; 17:952-5. [DOI: 10.1021/ol503766y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ganesh Pandey
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow-226014, India
| | - Jagadish Khamrai
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow-226014, India
| | - Akash Mishra
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow-226014, India
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12
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Xiao JA, Liu Q, Ren JW, Liu J, Carter RG, Chen XQ, Yang H. Highly Enantioselective Construction of Polycyclic Spirooxindoles by Organocatalytic 1,3-Dipolar Cycloaddition of 2-Cyclohexenone Catalyzed by Proline-Sulfonamide. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402953] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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13
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Banerjee P, Pandey AK. Synthesis of functionalized dispiro-oxindoles through azomethine ylide dimerization and mechanistic studies to explain the diastereoselectivity. RSC Adv 2014. [DOI: 10.1039/c4ra01492h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Synthesis of functionalized dispiro-oxindoles via [3 + 3]-cycloaddition of azomethine ylide generated from condensation of isatin and proline is reported. A transition state model for the origin of diastereoselectivity and mechanism of formation of these types of adducts is proposed.
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Affiliation(s)
- Prabal Banerjee
- Department of Chemistry
- Indian Institute of Technology Ropar
- RoparIndia, Punjab
| | - Ashok Kumar Pandey
- Department of Chemistry
- Indian Institute of Technology Ropar
- RoparIndia, Punjab
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14
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Bao X, Cao YX, Chu WD, Qu H, Du JY, Zhao XH, Ma XY, Wang CT, Fan CA. Bioinspired Total Synthesis of Montanine-TypeAmaryllidaceaeAlkaloids. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201307324] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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15
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Bao X, Cao YX, Chu WD, Qu H, Du JY, Zhao XH, Ma XY, Wang CT, Fan CA. Bioinspired total synthesis of montanine-type Amaryllidaceae alkaloids. Angew Chem Int Ed Engl 2013; 52:14167-72. [PMID: 24214519 DOI: 10.1002/anie.201307324] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Xu Bao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000 (China)
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16
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Mizukami M, Wada K, Sato G, Ishii Y, Kawahara N, Nagumo S. Novel method for construction of tetrahydro-1-benzazepine and tetrahydro-2-benzazepine based on 7-endo selective Friedel–Crafts cyclization of vinyloxirane. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Pandey G, Gadre SR. Stereoselective construction of 5,11-methanomorphanthridine and 5,10b-phenanthridine structural frameworks: Total syntheses of (±)-pancracine, (±)-brunsvigine, (±)-maritidine, and (±)-crinine. PURE APPL CHEM 2012. [DOI: 10.1351/pac-con-11-10-12] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The core structure of the complex pentacyclic 5,11-methanomorphanthridine skeleton and the vicinal quaternary and tertiary stereocenters of the 5,10b-phenanthridine skeleton are constructed stereospecifically in one step employing intramolecular 1,3-dipolar cycloaddition of a nonstabilized azomethine ylide (AMY) generated by the sequential double desilylation of appropriate bis-trimethylsilylmethyl amines using Ag(I)F as a single-electron oxidant. The strategy is successfully applied for the total synthesis of biologically active alkaloids such as (±)-pancracine, (±)-brunsvigine, (±)-maritidine, and (±)-crinine.
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Affiliation(s)
- Ganesh Pandey
- 1Division of Organic Chemistry, National Chemical Laboratory, Pune-411008, India
| | - Smita R. Gadre
- 1Division of Organic Chemistry, National Chemical Laboratory, Pune-411008, India
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18
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Guan Y, Zhang H, Pan C, Wang J, Huang R, Li Q. Flexible synthesis of montanine-like alkaloids: revisiting the structure of montabuphine. Org Biomol Chem 2012; 10:3812-4. [PMID: 22495547 DOI: 10.1039/c2ob25374g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient and stereocontrolled synthetic strategy towards the synthesis of montanine-like alkaloids was developed. Our results suggest that the structure elucidation for natural montabuphine needs further elaboration.
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Affiliation(s)
- Yifu Guan
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan, P R China
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19
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Pandiancherri S, Ryan SJ, Lupton DW. 1,3-Dipolar cycloaddition of unstabilised azomethine ylides by Lewis base catalysis. Org Biomol Chem 2012; 10:7903-11. [DOI: 10.1039/c2ob26047f] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Lazareva NF. N-(silylmethyl)amines, -amides, and -amino acids: biological activity and prospects in drug synthesis. Russ Chem Bull 2011. [DOI: 10.1007/s11172-011-0097-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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21
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Pandey G, C PK. Iminium Ion Cascade Reaction in the Total Synthesis of (+)-Vincadifformine. Org Lett 2011; 13:4672-5. [DOI: 10.1021/ol201892j] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Ganesh Pandey
- Division of Organic Chemistry, National Chemical Laboratory, Pune-411008, India
| | - Prasanna Kumara C
- Division of Organic Chemistry, National Chemical Laboratory, Pune-411008, India
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22
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Pandey G, Kumar R, Banerjee P, Puranik VG. One-Step Stereospecific Strategy for the Construction of the Core Structure of the 5,11-Methanomorphanthridine Alkaloids in Racemic as well as in Optically Pure Form: Synthesis of (±)-Pancracine and (±)-Brunsvigine. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100601] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Pandey G, Gupta NR, Gadre SR. Construction of the 5,10b-Phenanthridine Skeleton Using [3+2]-Cycloaddition of a Non-Stabilized Azomethine Ylide: Total Synthesis of (±)-Maritidine and (±)-Crinine Alkaloids. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001263] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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24
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Stern T, Rückbrod S, Czekelius C, Donner C, Brunner H. A Selective and Benign Synthesis of Functionalized Benzalacetones
via
Mizoroki–Heck Reaction Using Aryldiazonium Salts. Adv Synth Catal 2010. [DOI: 10.1002/adsc.200900868] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Therese Stern
- Atotech Deutschland GmbH, Erasmusstrasse 20, 10553 Berlin, Germany, Fax: (+49)‐030‐34985‐727; phone: (+49)‐030‐34985‐589
| | - Sven Rückbrod
- Atotech Deutschland GmbH, Erasmusstrasse 20, 10553 Berlin, Germany, Fax: (+49)‐030‐34985‐727; phone: (+49)‐030‐34985‐589
| | - Constantin Czekelius
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany
| | - Constanze Donner
- Atotech Deutschland GmbH, Erasmusstrasse 20, 10553 Berlin, Germany, Fax: (+49)‐030‐34985‐727; phone: (+49)‐030‐34985‐589
| | - Heiko Brunner
- Atotech Deutschland GmbH, Erasmusstrasse 20, 10553 Berlin, Germany, Fax: (+49)‐030‐34985‐727; phone: (+49)‐030‐34985‐589
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25
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Cedrón JC, Del Arco-Aguilar M, Estévez-Braun A, Ravelo AG. Chemistry and biology of Pancratium alkaloids. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2010; 68:1-37. [PMID: 20334035 DOI: 10.1016/s1099-4831(10)06801-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Affiliation(s)
- Juan C Cedrón
- Instituto Universitario de Bio-Orgánica "Antonio González", Universidad de La Laguna, La Laguna, Tenerife, Spain
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26
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Pansare SV, Lingampally R, Kirby RL. Stereoselective synthesis of 3-aryloctahydroindoles and application in a formal synthesis of (-)-pancracine. Org Lett 2010; 12:556-9. [PMID: 20055457 DOI: 10.1021/ol902761a] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A stereoselective synthesis of 3-aryloctahydroindoles from enantiomerically enriched gamma-nitroketones has been developed. Reduction of imines derived form the nitroketones provides the trans-fused octhaydroindole motif selectively. The cis-octahydroindole skeleton is accessible by an invertive cyclization strategy involving a diastereomerically pure nitromesylate intermediate. This approach was employed in the synthesis of an advanced intermediate to (-)-pancracine. The gamma-nitroketone starting materials are readily available via an organocatalytic Michael reaction.
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Affiliation(s)
- Sunil V Pansare
- Department of Chemistry, Memorial University, St. John's, Newfoundland, Canada A1B 3X7.
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Karthikeyan K, Senthil Kumar R, Muralidharan D, Perumal P. Diastereoselective synthesis of pyrrolidines via 1,3-dipolar cycloaddition of a chiral azomethine ylide. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.10.030] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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29
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Pandey G, Gupta NR, Pimpalpalle TM. Stereoselective One-Step Construction of Vicinal Quaternary and Tertiary Stereocenters of the 5,10b-Ethanophenanthridine Skeleton: Total Synthesis of (±)-Maritidine. Org Lett 2009; 11:2547-50. [DOI: 10.1021/ol900806m] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ganesh Pandey
- Division of Organic Chemistry, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-411 008, India
| | - Nishant R. Gupta
- Division of Organic Chemistry, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-411 008, India
| | - Tukaram M. Pimpalpalle
- Division of Organic Chemistry, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-411 008, India
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30
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Cedrón JC, Estévez-Braun A, Ravelo AG, Gutiérrez D, Flores N, Bucio MA, Pérez-Hernández N, Joseph-Nathan P. Bioactive montanine derivatives from halide-induced rearrangements of haemanthamine-type alkaloids. Absolute configuration by VCD. Org Lett 2009; 11:1491-4. [PMID: 19320502 DOI: 10.1021/ol900065x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An unexpected rearrangement of haemanthamine-type alkaloids in the presence of halogenating agents has been found. Rearranged compounds present the 5,11-methanomorphantridine framework characteristic of montanine-type alkaloids. These compounds are difficult to obtain because of their scarcity in natural sources and because the synthetic approaches developed so far require numerous steps. Vibrational circular dichroism (VCD) spectroscopy was used to determine the absolute configuration of one of the rearranged compounds. Several rearranged alkaloids showed antimalarial activity.
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Affiliation(s)
- Juan C Cedrón
- Instituto Universitario de Bio-Organica "Antonio Gonzalez", Universidad de La Laguna, Av. Astrofísico Francisco Sanchez 2, 38206 La Laguna-Tenerife, Spain
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31
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Anada M, Tanaka M, Shimada N, Nambu H, Yamawaki M, Hashimoto S. Asymmetric formal synthesis of (−)-pancracine via catalytic enantioselective C–H amination process. Tetrahedron 2009. [DOI: 10.1016/j.tet.2008.10.091] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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32
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Matveenko M, Banwell MG, Willis AC. A chemoenzymatic total synthesis of the structure assigned to the alkaloid (+)-montabuphine. Org Lett 2008; 10:4693-6. [PMID: 18816123 DOI: 10.1021/ol801815k] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An enantioselective synthesis of the structure, 3, assigned to the alkaloid (+)-montabuphine has been achieved using the readily available metabolite 4 as starting material. A comparison of the physical and spectral data recorded on compound 3 with those reported for (+)-montabuphine suggests that they are different compounds.
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Affiliation(s)
- Maria Matveenko
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 0200, Australia
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33
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Hong AW, Cheng TH, Raghukumar V, Sha CK. An expedient route to Montanine-type Amaryllidaceae alkaloids: total syntheses of (-)-brunsvigine and (-)-manthine. J Org Chem 2008; 73:7580-5. [PMID: 18781802 DOI: 10.1021/jo801089y] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first total syntheses of (-)-brunsvigine (1) and (-)-manthine (2) were accomplished in 10 and 18 steps, respectively. (-)-Quinic acid was converted to enone 12 in five steps. Iodination of enone 12 followed by stereoselective reduction yielded alpha-iodo allylic alcohol 16. Conversion of alcohol 16 into Weinreb amide 11 followed by anionic cyclization gave bicyclic enone 10. Stereoselective reduction of enone 10 and subsequent protection afforded pivaloate 9. Grignard addition of 8 to 9 and detosylation afforded amine derivative 19. Pictet-Spengler cyclization of 19 with Eschenmoser's salt and subsequent hydrolysis gave enantiomerically pure (-)-brunsvigine (1). For the total synthesis of (-)-manthine (2), the key intermediate 7 was hydrolyzed to diol 21. Conversion of 21 into 22 followed by regioselective cleavage with DIBAL furnished alcohol 25. Alcohol 25 was converted to the corresponding triflate 26, which on treatment with CsOAc and 18-crown-6 gave stereoinverted acetate 27. Hydrolysis of acetate 27 followed by methylation afforded compound 29. Detosylation of 29 afforded amine derivative 30. Pictet-Spengler cyclization of 30 followed by debenzylation gave alcohol 33. Finally, methylation of alcohol 33 afforded (-)-manthine (2).
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Affiliation(s)
- An-Wei Hong
- Department of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan, ROC
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Affiliation(s)
- Nitin T. Patil
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Yoshinori Yamamoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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35
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36
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Novel Syntheses of [6,7,n]-Benzazepinone and [6,6,n]-Benzophenanthridinone Derivatives by Rhodium-catalyzed Cyclization of o-(n-Cyanoalkynyl)benzaldehydes. B KOREAN CHEM SOC 2007. [DOI: 10.5012/bkcs.2007.28.11.1927] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Banwell MG, Kokas OJ, Willis AC. Chemoenzymatic approaches to the montanine alkaloids: a total synthesis of (+)-brunsvigine. Org Lett 2007; 9:3503-6. [PMID: 17672470 DOI: 10.1021/ol071344y] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The readily available and enzymatically derived cis-1,2-dihydrocatechols 3a and 3b have been elaborated over 17 steps, including a novel radical addition/elimination sequence, into the enantiomer, (+)-1, of the montanine alkaloid brunsvigine [(-)-1].
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Affiliation(s)
- Martin G Banwell
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 0200, Australia.
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Coldham I, Dobson BC, Fletcher SR, Franklin AI. Intramolecular Dipolar Cycloaddition Reactions to Give Substituted Indoles – A Formal Synthesis of Deethylibophyllidine. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700045] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
A great number of natural products, especially alkaloids, which exhibit a range of biological activities including acetylcholinesterase inhibition and antineoplastic, cardiovascular and immunostimulatory activities, have been isolated from the plants of the Amaryllidaceae family. this review summarizes isolation, biological activity, and synthetic studies of these alkaloids. The primary biosynthetic pathways of each type of alkaloids are also proposed.
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Affiliation(s)
- Zhong Jin
- State Key Laboratory and Institute of Elemento-organic Chemistry, Nankai University, Tianjin 300071, P. R. China.
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Pandey G, Dumbre SG, Khan MI, Shabab M. Convergent Approach toward the Synthesis of the Stereoisomers of C-6 Homologues of 1-Deoxynojirimycin and Their Analogues: Evaluation as Specific Glycosidase Inhibitors. J Org Chem 2006; 71:8481-8. [PMID: 17064023 DOI: 10.1021/jo061455v] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new and stereoselective strategy is developed to synthesize an appropriate template 9 to obtain C-6 homologues of 1-deoxyazasugars such as 1-deoxy-D-galactohomonojirimycin (5), 1-deoxy-4-hydroxymethyl-D-glucohomonojirimycin (6), and their enantiomers. The template 9 is also used to obtain neutral nonbasic pseudo-glyconolactam (8), C-4 amino, and methyl analogues of 1-deoxy-homonojirimycin as new analogues of 1-deoxyhomoazasugars. Compound 5 is found to be a potent and specific inhibitor to alpha-galactosidase (Ki = 1.7 microM). Similarly compounds 6 (Ki= 28 microM), ent-5 (Ki= 129 microM), and ent-6 (Ki= 12 microM) exhibited specific inhibition of beta-glucosidase.
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Affiliation(s)
- Ganesh Pandey
- Division of Organic Chemistry (Synthesis) and Division of Biochemical Science, National Chemical Laboratory, Pune-411008, India.
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Virányi A, Marth G, Dancsó A, Blaskó G, Tőke L, Nyerges M. 3-Nitrochromene derivatives as 2π components in 1,3-dipolar cycloadditions of azomethine ylides. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.06.101] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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