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Du S, Huo X, Wang X. Synthesis of the Cyclopentane Core Skeleton of Cranomycin and Jogyamycin. Org Lett 2024; 26:2945-2948. [PMID: 38567811 DOI: 10.1021/acs.orglett.4c00491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
Cranomycin and jogyamycin, two aminocyclopentitol natural products, possess complex structures and potential medicinal properties. This review describes synthetic studies about the process of making an advanced intermediate of cranomycin and jogyamycin. This highly functionalized intermediate, featuring three contiguous amine-substituted stereocenters, was constructed from cyclopentadiene through a series of reactions including the nitroso Diels-Alder reaction, nitrogen radical cyclization reaction, 1,2-nitrogen migration, and stereoselective nitrogen addition.
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Affiliation(s)
- Shuo Du
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xing Huo
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xiaolei Wang
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
- State Key Laboratory of Veterinary Etiological Biology, College of Veterinary Medicine, Lanzhou University, Lanzhou, 730000, P. R. China
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2
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Gerstner NC, Nicastri KA, Schomaker JM. Strategien für die Synthese von Pactamycin und Jogyamycin. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202004560] [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)
- Nels C. Gerstner
- Department of Chemistry University of Wisconsin 1101 University Avenue Madison WI 53706 USA
| | - Kate A. Nicastri
- Department of Chemistry University of Wisconsin 1101 University Avenue Madison WI 53706 USA
| | - Jennifer M. Schomaker
- Department of Chemistry University of Wisconsin 1101 University Avenue Madison WI 53706 USA
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3
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Gerstner NC, Nicastri KA, Schomaker JM. Strategies for the Syntheses of Pactamycin and Jogyamycin. Angew Chem Int Ed Engl 2021; 60:14252-14271. [PMID: 32392399 DOI: 10.1002/anie.202004560] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Indexed: 01/24/2023]
Abstract
Pactamycin and jogyamycin are aminocyclopentitol natural products, where each core carbon bears a stereodefined alcohol or amine moiety. Their structural complexity, coupled with the diversity of functional groups coexisting in a condensed space, make them fascinating synthetic targets in their own right. Pactamycin and its derivatives bind to the 30S ribosomal subunit and display activity against parasites responsible for drug-resistant malaria and African sleeping sickness; however, efforts to develop their therapeutic potential have been hampered by their cellular toxicity. Interestingly, bioengineered analogues display differences in selectivity and toxicity towards mammalian cells, spurring efforts to develop flexible strategies to thoroughly probe structure-activity relationships (SAR), particularly in analogues lacking the C7 hydroxyl group of pactamycin. This review compares and contrasts approaches towards pactamycin and jogyamycin, including two successful total syntheses of the former. The implications of each route for preparing analogues to inform SAR and lead to compounds with increased selectivity for binding malarial over human ribosomes are briefly discussed.
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Affiliation(s)
- Nels C Gerstner
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA
| | - Kate A Nicastri
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA
| | - Jennifer M Schomaker
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA
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4
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Miura Y, Ouchi H, Inai M, Osawa T, Yoshimura F, Kanazawa J, Uchiyama M, Kondo M, Kan T. Synthetic Studies on Pactamycin: A Synthesis of Johnson's Intermediate. Org Lett 2020; 22:3515-3518. [PMID: 32319784 DOI: 10.1021/acs.orglett.0c00959] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A formal total synthesis of pactamycin (1) has been accomplished by face-selective and regioselective nitroso Diels-Alder (NDA) reaction of acyl nitroso compound 14, which contains a camphorsultam chiral auxiliary, and chiral cyclopentadiene 12. Construction of the chiral secondary alcohol of 12 was performed by (S,S)-Ts-DENEB catalyst-mediated reduction, and the NDA adduct 15a was readily converted to Johnson's intermediate 21.
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Affiliation(s)
- Yusuke Miura
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Hitoshi Ouchi
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Makoto Inai
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Taisei Osawa
- Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Fumihiko Yoshimura
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Junichiro Kanazawa
- Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.,Cluster for Pioneering Research (CPR), RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.,Cluster for Pioneering Research (CPR), RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Mitsuru Kondo
- Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Toshiyuki Kan
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
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5
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6
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Su JY, Olson DE, Ting SI, Du Bois J. Synthetic Studies Toward Pactamycin Highlighting Oxidative C-H and Alkene Amination Technologies. J Org Chem 2018; 83:7121-7134. [PMID: 29708344 DOI: 10.1021/acs.joc.8b00142] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A strategy enabled by C-H and alkene amination technologies for synthesizing the aminocyclitol natural product, pactamycin, is disclosed. This work features two disparate approaches for assembling the five-membered ring core of the target, the first of which utilizes acyl anion catalysis and a second involving β-ketoester aerobic hydroxylation. Installation of the C3-N bond, one of three contiguous nitrogen centers, is made possible through Rh-catalyzed allylic C-H amination of a sulfamate ester. Subsequent efforts are presented to introduce the C1,C2 cis-diamino moiety en route to pactamycin, including carbamate-mediated alkene aziridination. In the course of these studies, assembly of the core of C2- epi-pactamycate, which bears the carbon skeleton and all of the requisite nitrogen and oxygen functional groups found in the natural product, has been achieved.
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Affiliation(s)
- Justin Y Su
- Department of Chemistry , Stanford University , 337 Campus Drive , Stanford , California 94305 , United States
| | - David E Olson
- Department of Chemistry , Stanford University , 337 Campus Drive , Stanford , California 94305 , United States
| | - Stephen I Ting
- Department of Chemistry , Stanford University , 337 Campus Drive , Stanford , California 94305 , United States
| | - J Du Bois
- Department of Chemistry , Stanford University , 337 Campus Drive , Stanford , California 94305 , United States
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7
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Brumsted CJ, Carpenter EL, Indra AK, Mahmud T. Asymmetric Synthesis and Biological Activities of Pactamycin-Inspired Aminocyclopentitols. Org Lett 2018; 20:397-400. [DOI: 10.1021/acs.orglett.7b03681] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Corey J. Brumsted
- Department
of Chemistry and ‡Department of Pharmaceutical Sciences, Oregon State University, Corvallis, Oregon 97333, United States
| | | | | | - Taifo Mahmud
- Department
of Chemistry and ‡Department of Pharmaceutical Sciences, Oregon State University, Corvallis, Oregon 97333, United States
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8
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Rodrigues R, Lazib Y, Maury J, Neuville L, Leboeuf D, Dauban P, Darses B. Approach to pactamycin analogues using rhodium(ii)-catalyzed alkene aziridination and C(sp3)–H amination reactions. Org Chem Front 2018. [DOI: 10.1039/c7qo00878c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Application of dirhodium(ii)-catalyzed nitrene transfers allows for the preparation of a platform bearing the triamino moiety present in pactamycin.
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Affiliation(s)
- Romain Rodrigues
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. Paris-Sud
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
| | - Yanis Lazib
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. Paris-Sud
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
| | - Julien Maury
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. Paris-Sud
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
| | - Luc Neuville
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. Paris-Sud
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
| | - David Leboeuf
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- CNRS UMR 8182
- Univ. Paris-Sud
- Université Paris-Saclay
- 91405 Orsay cedex
| | - Philippe Dauban
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. Paris-Sud
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
| | - Benjamin Darses
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. Paris-Sud
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
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9
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Tangara S, Kanazawa A, Py S. The Baldwin Rearrangement: Synthesis of 2-Acylaziridines. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700920] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Salia Tangara
- Univ. Grenoble Alpes; DCM; CNRS; 38000 Grenoble France
| | | | - Sandrine Py
- Univ. Grenoble Alpes; DCM; CNRS; 38000 Grenoble France
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10
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Tangara S, Aupic C, Kanazawa A, Poisson JF, Py S. Aziridination of Cyclic Nitrones Targeting Constrained Iminosugars. Org Lett 2017; 19:4842-4845. [DOI: 10.1021/acs.orglett.7b02283] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Salia Tangara
- Univ. Grenoble Alpes, DCM, F-38000 Grenoble, France
- CNRS, DCM, F-38000 Grenoble, France
| | - Clara Aupic
- Univ. Grenoble Alpes, DCM, F-38000 Grenoble, France
- CNRS, DCM, F-38000 Grenoble, France
| | - Alice Kanazawa
- Univ. Grenoble Alpes, DCM, F-38000 Grenoble, France
- CNRS, DCM, F-38000 Grenoble, France
| | - Jean-François Poisson
- Univ. Grenoble Alpes, DCM, F-38000 Grenoble, France
- CNRS, DCM, F-38000 Grenoble, France
| | - Sandrine Py
- Univ. Grenoble Alpes, DCM, F-38000 Grenoble, France
- CNRS, DCM, F-38000 Grenoble, France
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11
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Goto A, Yoshimura S, Nakao Y, Inai M, Asakawa T, Egi M, Hamashima Y, Kondo M, Kan T. Synthetic Study on Pactamycin: Stereoselective Synthesis of the Cyclopentane Core Framework. Org Lett 2017; 19:3358-3361. [PMID: 28604005 DOI: 10.1021/acs.orglett.7b01257] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The cyclopentane core framework 23 of pactamycin (1) was synthesized in 14 steps from symmetric cyclohexadiene 11. Our synthetic strategy features Rh-mediated catalytic desymmetrization of 10 via aziridination and then regioselective ring-opening reaction of sulfonylaziridine 9 with NaN3, ring-contraction of cyclohexene 14 by ozonolysis followed by intramolecular aldol reaction, and stereoselective construction of the sequential tetrasubstituted carbons by dihydroxylation and methylation reaction. Stereospecific incorporation of amine on tetrasubstituted carbon was achieved by Curtius rearrangement and subsequent carbamide formation.
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Affiliation(s)
- Atsumi Goto
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Satoshi Yoshimura
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yuta Nakao
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Makoto Inai
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Tomohiro Asakawa
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Masahiro Egi
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yoshitaka Hamashima
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Mitsuru Kondo
- Graduate School of Science and Technology, Shizuoka University , 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Toshiyuki Kan
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
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12
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13
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Yamaguchi M, Hayashi M, Hamada Y, Nemoto T. Synthetic Study of Pactamycin: Enantioselective Construction of the Pactamycin Core with Five Contiguous Stereocenters. Org Lett 2016; 18:2347-50. [PMID: 27171747 DOI: 10.1021/acs.orglett.6b00761] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A synthetic study of pactamycin is described. Enantioselective construction of the aminocyclopentitol core of pactamycin bearing five contiguous stereocenters was achieved based on an organocatalytic asymmetric aziridination of 2-cyclopentene-1-one, a regio- and diastereoselective 1,3-dipolar cycloaddition, and a rhodium-catalyzed C-H amination reaction.
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Affiliation(s)
- Mami Yamaguchi
- Graduate School of Pharmaceutical Sciences, Chiba University , 1-8-1, Inohana, Chuo-ku, Chiba, 260-8675, Japan
| | - Minami Hayashi
- Graduate School of Pharmaceutical Sciences, Chiba University , 1-8-1, Inohana, Chuo-ku, Chiba, 260-8675, Japan
| | - Yasumasa Hamada
- Graduate School of Pharmaceutical Sciences, Chiba University , 1-8-1, Inohana, Chuo-ku, Chiba, 260-8675, Japan
| | - Tetsuhiro Nemoto
- Graduate School of Pharmaceutical Sciences, Chiba University , 1-8-1, Inohana, Chuo-ku, Chiba, 260-8675, Japan.,Molecular Chirality Research Center, Chiba University , 1-33, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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14
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Bera S, Chatterjee B, Mondal D. Construction of quaternary stereocentres on carbohydrate scaffolds. RSC Adv 2016. [DOI: 10.1039/c6ra13898e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
This review describes a glimpse of the various strategies for constructing stereo-defined quaternary centres in densely functionalised carbohydrates moiety of structurally intriguing and biologically potent natural products and building blocks.
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Affiliation(s)
- Smritilekha Bera
- School of Chemical Sciences
- Central University of Gujarat
- Gandhinagar-382030
- India
| | | | - Dhananjoy Mondal
- School of Chemical Sciences
- Central University of Gujarat
- Gandhinagar-382030
- India
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15
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Sharpe RJ, Malinowski JT, Sorana F, Luft JC, Bowerman CJ, DeSimone JM, Johnson JS. Preparation and biological evaluation of synthetic and polymer-encapsulated congeners of the antitumor agent pactamycin: insight into functional group effects and biological activity. Bioorg Med Chem 2015; 23:1849-57. [PMID: 25792144 PMCID: PMC4380168 DOI: 10.1016/j.bmc.2015.02.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 02/01/2015] [Accepted: 02/11/2015] [Indexed: 01/15/2023]
Abstract
The synthesis and biological analysis of a number of novel congeners of the aminocyclopentitol pactamycin is described. Specific attention was paid to the preparation of derivatives at crucial synthetic branch points of the parent structure, and biological assays revealed a number of insights into the source of pactamycin's biological activity. Additionally, the encapsulation of pactamycin and select derivatives into the PRINT© nanoparticle technology was investigated as a proof-of-concept, and evidence of bioactivity modulation through nanoparticle delivery is demonstrated. This work has provided heretofore unrealized access to a large number of novel compounds for further evaluation.
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Affiliation(s)
- Robert J Sharpe
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, United States
| | - Justin T Malinowski
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, United States
| | - Federico Sorana
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, United States
| | - J Christopher Luft
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, United States; Department of Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, United States
| | - Charles J Bowerman
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, United States
| | - Joseph M DeSimone
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, United States; Department of Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, United States; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, United States; Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695-8613, United States; Carolina Center of Cancer Nanotechnology Excellence, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, United States; Institute for Nanomedicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, United States; Institute for Advanced Materials, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, United States; Sloan-Kettering Institute for Cancer Research, Memorial Sloan-Kettering Cancer Center, New York, NY 10065-9321, United States
| | - Jeffrey S Johnson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, United States.
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16
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Sharpe RJ, Malinowski JT, Johnson JS. Asymmetric synthesis of the aminocyclitol pactamycin, a universal translocation inhibitor. J Am Chem Soc 2013; 135:17990-8. [PMID: 24245656 PMCID: PMC3896956 DOI: 10.1021/ja409944u] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An asymmetric total synthesis of the aminocyclopentitol pactamycin is described. The title compound is delivered in 15 steps from 2,4-pentanedione. Critical to this approach was the exploitation of a complex symmetry-breaking reduction strategy to assemble the C1, C2, and C7 relative stereochemistry within the first four steps of the synthesis. Multiple iterations of this reduction strategy are described, and a thorough analysis of stereochemical outcomes is detailed. In the final case, an asymmetric Mannich reaction was developed to install a protected amine directly at the C2 position. Symmetry-breaking reduction of this material gave way to a remarkable series of stereochemical outcomes leading to the title compound without recourse to nonstrategic downstream manipulations. This synthesis is immediately accommodating to the preparation of structural analogs.
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Affiliation(s)
- Robert J. Sharpe
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290
| | - Justin T. Malinowski
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290
| | - Jeffrey S. Johnson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290
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17
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Malinowski JT, Sharpe RJ, Johnson JS. Enantioselective synthesis of pactamycin, a complex antitumor antibiotic. Science 2013; 340:180-2. [PMID: 23580525 PMCID: PMC3952063 DOI: 10.1126/science.1234756] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Medicinal application of many complex natural products is precluded by the impracticality of their chemical synthesis. Pactamycin, the most structurally intricate aminocyclopentitol antibiotic, displays potent antiproliferative properties across multiple phylogenetic domains, but it is highly cytotoxic. A limited number of analogs produced by genetic engineering technologies show reduced cytotoxicity against mammalian cells, renewing promise for therapeutic applications. For decades, an efficient synthesis of pactamycin amenable to analog derivatizations has eluded researchers. Here, we present a short asymmetric total synthesis of pactamycin. An enantioselective Mannich reaction and symmetry-breaking reduction sequence was designed to enable assembly of the entire carbon core skeleton in under five steps and control critical three-dimensional (stereochemical) functional group relationships. This modular route totals 15 steps and is immediately amenable for structural analog synthesis.
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Affiliation(s)
- Justin T. Malinowski
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Robert J. Sharpe
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Jeffrey S. Johnson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
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18
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Loertscher BM, Young PR, Evans PR, Castle SL. Diastereoselective synthesis of vicinal tertiary diols. Org Lett 2013; 15:1930-3. [PMID: 23574012 DOI: 10.1021/ol4005799] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A strategy for the synthesis of differentiated vicinal tertiary diols is described. The key step is a high-yielding, diastereoselective LaCl3·2LiCl-mediated addition of a Grignard or organolithium reagent to ketone 2a. The reaction is believed to proceed via a 1,3-chelated intermediate. One of the adducts has been transformed into a functionalized cyclopentenone resembling the core structure of pactamycin.
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Affiliation(s)
- Brad M Loertscher
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
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19
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Hanessian S, Vakiti RR, Chattopadhyay AK, Dorich S, Lavallée C. Probing functional diversity in pactamycin toward antibiotic, antitumor, and antiprotozoal activity. Bioorg Med Chem 2013; 21:1775-86. [DOI: 10.1016/j.bmc.2013.01.037] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 01/15/2013] [Accepted: 01/21/2013] [Indexed: 10/27/2022]
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20
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Hanessian S, Vakiti RR, Dorich S, Banerjee S, Deschênes-Simard B. Total synthesis of pactamycin and pactamycate: a detailed account. J Org Chem 2012; 77:9458-72. [PMID: 23083207 DOI: 10.1021/jo301638z] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This article describes synthetic studies that culminated in the first total synthesis of pactamycin and pactamycate and, in parallel, the two known congeners, de-6-MSA-pactamycin and de-6-MSA-pactamycate, lacking the 6-methylsalicylyl moiety. Starting with L-threonine as a chiron, a series of stereocontrolled condensations led to a key cyclopentenone harboring a spirocyclic oxazoline. A series of systematic functionalizations led initially to the incorrect cyclopentanone epoxide, which was "inverted" under solvolytic conditions. Installation of the remaining groups and manipulation of the oxazoline eventually led to pactamycin, pactamycate, and their desalicylyl analogues.
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Affiliation(s)
- Stephen Hanessian
- Department of Chemistry, Université de Montréal, Montreal, Quebec, Canada H3C 3J7.
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