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Phatake RS, Averdunk A, Würtele C, Gellrich U. Piers’ Borane-Catalyzed Dimerization of Arylallenes via Transborylation: A Synthetic and Mechanistic Study. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ravindra S. Phatake
- Institut für Organische Chemie, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 17, 35392Gießen, Germany
| | - Arthur Averdunk
- Institut für Organische Chemie, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 17, 35392Gießen, Germany
| | - Christian Würtele
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 17, 35392Gießen, Germany
| | - Urs Gellrich
- Institut für Organische Chemie, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 17, 35392Gießen, Germany
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2
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Ao J, Sun C, Chen B, Yu N, Liang G. Total Synthesis of Isorosthin L and Isoadenolin I. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Junli Ao
- State Key Laboratory of Elemento-organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
- School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Chao Sun
- School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Bolin Chen
- State Key Laboratory of Elemento-organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
| | - Na Yu
- School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Guangxin Liang
- School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
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3
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Ao J, Sun C, Chen B, Yu N, Liang G. Total Synthesis of Isorosthin L and Isoadenolin I. Angew Chem Int Ed Engl 2021; 61:e202114489. [PMID: 34773349 DOI: 10.1002/anie.202114489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Indexed: 11/05/2022]
Abstract
Total syntheses of two Isodon diterpenes, isorosthin L and isoadenolin I, are reported. The synthetic strategy features a quick assembly of two simple building blocks through a diastereoselective intermolecular aldol reaction and a subsequent radical cyclization for efficient construction of a rather complex advanced intermediate bearing a quaternary stereocenter present in all Isodon diterpenes. Oxidative cleavage of the C-C bond in the cyclopentane enabled the conversion to a lactone moiety which is desired for the construction of the molecular skeleton through reductive coupling with an aldehyde carbonyl group.
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Affiliation(s)
- Junli Ao
- Nankai University, College of Chemistry, 300071, Tianjin, CHINA
| | - Chao Sun
- ShanghaiTech University, School of Physical Science and Technology, 201210, Shanghai, CHINA
| | - Bolin Chen
- Nankai University, College of Chemistry, 300071, CHINA
| | - Na Yu
- ShanghaiTech University, School of Physical Science and Technology, 201210, Shanghai, CHINA
| | - Guangxin Liang
- ShanghaiTech University, School of Physical Science and Technology, 94 Weijin Road, Nankai District, 300071, Tianjin, CHINA
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4
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Emmetiere F, Ratnayake R, Schares HAM, Jones KFM, Bevan-Smith E, Luesch H, Harki DA, Grenning AJ. Function-Oriented and Modular (+/-)-cis-Pseudoguaianolide Synthesis: Discovery of New Nrf2 Activators and NF-κB Inhibitors. Chemistry 2021; 27:5564-5571. [PMID: 33502811 DOI: 10.1002/chem.202100038] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 01/21/2021] [Indexed: 12/26/2022]
Abstract
Described herein is a function-oriented synthesis route and biological evaluation of pseudoguaianolide analogues. The 10-step synthetic route developed retains the topological complexity of the natural product, installs functional handles for late-stage diversification, and forges the key bioactive Michael acceptors early in the synthesis. The analogues were found to be low-micromolar Nrf2 activators and micromolar NF-κB inhibitors and dependent on the local environment of the Michael acceptor moieties.
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Affiliation(s)
- Fabien Emmetiere
- Department of Chemistry, University of Florida, PO Box 117200, Gainesville, FL, 32608, USA
| | - Ranjala Ratnayake
- Department of Medicinal Chemistry and Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL, 32610, USA
| | - Henry A M Schares
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Katherine F M Jones
- Department of Chemistry, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Emily Bevan-Smith
- Department of Chemistry, University of Florida, PO Box 117200, Gainesville, FL, 32608, USA
| | - Hendrik Luesch
- Department of Medicinal Chemistry and Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL, 32610, USA
| | - Daniel A Harki
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN, 55455, USA.,Department of Chemistry, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Alexander J Grenning
- Department of Chemistry, University of Florida, PO Box 117200, Gainesville, FL, 32608, USA
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5
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Yang L, Wurm T, Sharma Poudel B, Krische MJ. Enantioselective Total Synthesis of Andrographolide and 14-Hydroxy-Colladonin: Carbonyl Reductive Coupling and trans-Decalin Formation by Hydrogen Transfer. Angew Chem Int Ed Engl 2020; 59:23169-23173. [PMID: 32896046 PMCID: PMC7920188 DOI: 10.1002/anie.202011363] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Indexed: 12/11/2022]
Abstract
An enantioselective total synthesis of the labdane diterpene andrographolide, the bitter principle of the herb Andrographis paniculata (known as "King of Bitters"), was accomplished in 14 steps (LLS). Key transformations include iridium-catalyzed carbonyl reductive coupling to form the quaternary C4 stereocenter, diastereoselective alkene reduction to establish the trans-decalin ring, and carbonylative lactonization to install the α-alkylidene-β-hydroxy-γ-butyrolactone.
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Affiliation(s)
| | | | | | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry, 105 E 24th St. (A5300), Austin, TX 78712-1167 (USA)
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6
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Yang L, Wurm T, Sharma Poudel B, Krische MJ. Enantioselective Total Synthesis of Andrographolide and 14‐Hydroxy‐Colladonin: Carbonyl Reductive Coupling and
trans
‐Decalin Formation by Hydrogen Transfer. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011363] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Lin Yang
- University of Texas at Austin Department of Chemistry 105 E 24th Street (A5300) Austin TX 78712-1167 USA
| | - Thomas Wurm
- University of Texas at Austin Department of Chemistry 105 E 24th Street (A5300) Austin TX 78712-1167 USA
| | - Binit Sharma Poudel
- University of Texas at Austin Department of Chemistry 105 E 24th Street (A5300) Austin TX 78712-1167 USA
| | - Michael J. Krische
- University of Texas at Austin Department of Chemistry 105 E 24th Street (A5300) Austin TX 78712-1167 USA
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7
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Baidilov D, Miskey S, Hudlicky T. Rapid Access to the Tricyclic Core of Calyciphylline A
-Type Alkaloids Through Allyl Cyanate-to-Isocyanate Rearrangement. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901549] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Daler Baidilov
- Department of Chemistry and Centre for Biotechnology; Brock University; 1812 Sir Isaac Brock Way L2S 3A1 St. Catharines ON Canada
| | - Scott Miskey
- Department of Chemistry and Centre for Biotechnology; Brock University; 1812 Sir Isaac Brock Way L2S 3A1 St. Catharines ON Canada
| | - Tomas Hudlicky
- Department of Chemistry and Centre for Biotechnology; Brock University; 1812 Sir Isaac Brock Way L2S 3A1 St. Catharines ON Canada
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8
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Hernandez LW, Sarlah D. Empowering Synthesis of Complex Natural Products. Chemistry 2019; 25:13248-13270. [DOI: 10.1002/chem.201901808] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 06/08/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Lucas W. Hernandez
- Department of Chemistry University of Illinois at Urbana-Champaign 600 South Mathews Avenue 270 RAL, Box 107-5 Urbana IL 61801 USA
| | - David Sarlah
- Department of Chemistry University of Illinois at Urbana-Champaign 600 South Mathews Avenue 270 RAL, Box 107-5 Urbana IL 61801 USA
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Hethcox JC, Shockley SE, Stoltz BM. Enantioselective Synthesis of Vicinal All-Carbon Quaternary Centers via Iridium-Catalyzed Allylic Alkylation. Angew Chem Int Ed Engl 2018; 57:8664-8667. [PMID: 29750856 PMCID: PMC6033654 DOI: 10.1002/anie.201804820] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Indexed: 01/08/2023]
Abstract
The development of the first enantioselective transition-metal-catalyzed allylic alkylation providing access to acyclic products bearing vicinal all-carbon quaternary centers is disclosed. The iridium-catalyzed allylic alkylation reaction proceeds with excellent yields and selectivities for a range of malononitrile-derived nucleophiles and trisubstituted allylic electrophiles. The utility of these sterically congested products is explored through a series of diverse chemo- and diastereoselective product transformations to afford a number of highly valuable, densely functionalized building blocks, including those containing vicinal all-carbon quaternary stereocenters.
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Affiliation(s)
- J Caleb Hethcox
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd, MC 101-20, Pasadena, CA, 91125, USA
| | - Samantha E Shockley
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd, MC 101-20, Pasadena, CA, 91125, USA
| | - Brian M Stoltz
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd, MC 101-20, Pasadena, CA, 91125, USA
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10
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Hethcox JC, Shockley SE, Stoltz BM. Enantioselective Synthesis of Vicinal All‐Carbon Quaternary Centers via Iridium‐Catalyzed Allylic Alkylation. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804820] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- J. Caleb Hethcox
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology 1200 E. California Blvd, MC 101-20 Pasadena CA 91125 USA
| | - Samantha E. Shockley
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology 1200 E. California Blvd, MC 101-20 Pasadena CA 91125 USA
| | - Brian M. Stoltz
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology 1200 E. California Blvd, MC 101-20 Pasadena CA 91125 USA
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