1
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Liu HY, Zhang ZY, Zhou YK, Chen JH, Yang Z, Li YH. Synthesis towards Phainanoid F: Photo-induced 6π-Electrocyclization for Constructing Contiguous All-Carbon Quaternary Centers. Chem Asian J 2023; 18:e202300622. [PMID: 37677108 DOI: 10.1002/asia.202300622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 08/27/2023] [Accepted: 09/04/2023] [Indexed: 09/09/2023]
Abstract
In this paper, we report an efficient strategy for synthesizing the DEFGH rings of phainanoid F. The key to the construction of the 13,30-cyclodammarane skeleton of the molecule was a photo-induced 6π-electrocyclization and a homoallylic elimination. Notably, this is a rare example of using electrocyclization reaction to simultaneously construct two vicinal quaternary carbons in total synthesis. The strategy outlined here forms the basis of our total synthesis of Phainanoid F, and it could also serve as a generally applicable approach for synthesizing other natural products containing similar 13,30-cyclodammarane skeletons.
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Affiliation(s)
- Hao-Yuan Liu
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
| | - Zhen-Yu Zhang
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
| | - Yi-Ke Zhou
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
| | - Jia-Hua Chen
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
| | - Zhen Yang
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
- State Key Laboratory of Chemical Oncogenomic, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
- Shenzhen Bay Laboratory, Shenzhen, 518055, China
| | - Yuan-He Li
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
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2
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Schatz DJ, Kuenstner EJ, George DT, Pronin SV. Synthesis of rearranged indole diterpenes of the paxilline type. Nat Prod Rep 2022; 39:946-968. [PMID: 34931646 PMCID: PMC10122275 DOI: 10.1039/d1np00062d] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Covering: up to 2021Rearranged indole diterpenes of the paxilline type comprise a large group of fungal metabolites that possess diverse structural features and potentially useful biological effects. The unique indoloterpenoid motif, which is common to all congeners, was first confirmed by crystallographic studies of paxilline. This family of natural products has fascinated organic chemists for the past four decades and has inspired numerous syntheses and synthetic approaches. The present review highlights efforts that have laid the foundation and introduced new directions to this field of natural product synthesis. The introduction includes a summary of biosynthetic considerations and biological activities, the main body of the manuscript provides a detailed discussion of selected syntheses, and the review concludes with a brief outlook on the future of the field.
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Affiliation(s)
- Devon J Schatz
- Department of Chemistry, University of California, Irvine, California, 92697-2025, USA.
| | - Eric J Kuenstner
- Department of Chemistry, University of California, Irvine, California, 92697-2025, USA.
| | - David T George
- Department of Chemistry, University of California, Irvine, California, 92697-2025, USA.
| | - Sergey V Pronin
- Department of Chemistry, University of California, Irvine, California, 92697-2025, USA.
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3
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Hauser N, Imhof MA, Eichenberger SS, Kündig T, Carreira EM. Total Synthesis of Shearinines D and G: A Convergent Approach to Indole Diterpenoids. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202112838] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Nicole Hauser
- Department of Chemistry and Applied Biosciences ETH Zürich Vladimir Prelog Weg 3, HCI H335 8093 Zürich Switzerland
| | - Michael A. Imhof
- Department of Chemistry and Applied Biosciences ETH Zürich Vladimir Prelog Weg 3, HCI H335 8093 Zürich Switzerland
| | - Sarah S. Eichenberger
- Department of Chemistry and Applied Biosciences ETH Zürich Vladimir Prelog Weg 3, HCI H335 8093 Zürich Switzerland
| | - Tomas Kündig
- Department of Chemistry and Applied Biosciences ETH Zürich Vladimir Prelog Weg 3, HCI H335 8093 Zürich Switzerland
| | - Erick M. Carreira
- Department of Chemistry and Applied Biosciences ETH Zürich Vladimir Prelog Weg 3, HCI H335 8093 Zürich Switzerland
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4
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Carreira EM, Hauser N, Imhof MA, Eichenberger SS, Kündig T. Total Synthesis of Shearinines D and G: A Convergent Approach to Indole Diterpenoids. Angew Chem Int Ed Engl 2021; 61:e202112838. [PMID: 34738695 PMCID: PMC9300186 DOI: 10.1002/anie.202112838] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Indexed: 11/11/2022]
Abstract
The first total syntheses of the indole diterpenoids (+)‐shearinine G and D are disclosed. The successful routes rely on late‐stage coupling of two complex fragments. Formation of the challenging trans‐hydrindane motif was accomplished by diastereoselective, intramolecular cyclopropanation. A one‐pot sequence consisting of Sharpless dihydroxylation/Achmatowicz reaction was developed to install the dioxabicyclo[3.2.1]octane motif. The indenone subunit was accessed by Prins cyclization. Tuning the electronic nature of the substituents on the parent arylcarboxaldehyde allowed access to divergent products that were further transformed into shearinines G and D. Riley‐type oxidation of a bicyclic enone yielded a surprising stereochemical outcome.
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Affiliation(s)
- Erick Moran Carreira
- ETH-Hönggerberg, Laboratorium für Anorganische Chemie, Vladimir Prelog Weg 3, HCl H335, 8093, Zürich, SWITZERLAND
| | | | - Michael A Imhof
- ETH-Zürich LOC: Eidgenossische Technische Hochschule Zurich Laboratorium fur Organische Chemie, Chemistry, SWITZERLAND
| | - Sarah S Eichenberger
- ETH-Zürich LOC: Eidgenossische Technische Hochschule Zurich Laboratorium fur Organische Chemie, Chemistry, SWITZERLAND
| | - Tomas Kündig
- ETH-Zürich LOC: Eidgenossische Technische Hochschule Zurich Laboratorium fur Organische Chemie, Chemistry, SWITZERLAND
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5
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Dogga B, Kumar CSA, Joseph JT. Palladium‐Catalyzed Reductive Carbonylation of (Hetero) Aryl Halides and Triflates Using Cobalt Carbonyl as CO Source. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001328] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Bhushanarao Dogga
- Department of Nanotechnology Visvesvaraya Technological University, CPGS Bangalore Region Muddenahalli Bangalore 562101 India
- Syngene International Ltd., Biocon Park Bommasandra IV Phase Jigani Link Road Bangalore 560099 India
| | - C. S. Ananda Kumar
- Department of Nanotechnology Visvesvaraya Technological University, CPGS Bangalore Region Muddenahalli Bangalore 562101 India
| | - Jayan T. Joseph
- Syngene International Ltd., Biocon Park Bommasandra IV Phase Jigani Link Road Bangalore 560099 India
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6
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Godfrey NA, Schatz DJ, Pronin SV. Twelve-Step Asymmetric Synthesis of (-)-Nodulisporic Acid C. J Am Chem Soc 2018; 140:12770-12774. [PMID: 30261724 PMCID: PMC6791361 DOI: 10.1021/jacs.8b09965] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A short, enantioselective synthesis of (-)-nodulisporic acid C is described. The route features two highly diastereoselective polycyclizations en route to the terpenoid core and the indenopyran fragment and a highly convergent assembly of a challenging indole moiety. Application of this chemistry allows for a 12-step synthesis of the target indoloterpenoid from commercially available material.
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Affiliation(s)
- Nicole A. Godfrey
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Devon J. Schatz
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Sergey V. Pronin
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
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7
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Schiavo L, Lebedel L, Massé P, Choppin S, Hanquet G. Access to Wieland-Miescher Diketone-Derived Building Blocks by Stereoselective Construction of the C-9 Quaternary Carbon Center Using the Mukaiyama Aldol Reaction. J Org Chem 2018; 83:6247-6258. [PMID: 29601190 DOI: 10.1021/acs.joc.7b02862] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The Mukaiyama aldol reaction has been used to efficiently install a lateral chain at the C-9 position of the Wieland-Miescher ketone derivative 3 within two steps, representing a shortcut compared to that of the classical sequences. The treatment of the silylated enol ether 8 with a wide range of acetals in the presence of tin tetrachloride led to a the diastereoselective construction of the C-9 quaternary center of 33 new building blocks derived from the Wieland-Miescher ketone derivative 3.
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Affiliation(s)
- Lucie Schiavo
- Laboratoire d'Innovation Moléculaire et Applications, ECPM, UMR 7042 , Université de Strasbourg/Université de Haute-Alsace, CNRS , 67000 Strasbourg , France
| | - Ludivine Lebedel
- Laboratoire d'Innovation Moléculaire et Applications, ECPM, UMR 7042 , Université de Strasbourg/Université de Haute-Alsace, CNRS , 67000 Strasbourg , France
| | - Paul Massé
- Laboratoire d'Innovation Moléculaire et Applications, ECPM, UMR 7042 , Université de Strasbourg/Université de Haute-Alsace, CNRS , 67000 Strasbourg , France
| | - Sabine Choppin
- Laboratoire d'Innovation Moléculaire et Applications, ECPM, UMR 7042 , Université de Strasbourg/Université de Haute-Alsace, CNRS , 67000 Strasbourg , France
| | - Gilles Hanquet
- Laboratoire d'Innovation Moléculaire et Applications, ECPM, UMR 7042 , Université de Strasbourg/Université de Haute-Alsace, CNRS , 67000 Strasbourg , France
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8
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Haraguchi R, Tanazawa SG, Tokunaga N, Fukuzawa SI. Palladium-Catalyzed Formylation of Alkenylzinc Reagents with S
-(4-Nitrophenyl) Thioformate. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701753] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ryosuke Haraguchi
- Department of Applied Chemistry; Institute of Science and Engineering; Chuo University; Kasuga 1-13-27, Bunkyo-ku 112-8551 Tokyo Japan
| | - Sho-go Tanazawa
- Department of Applied Chemistry; Institute of Science and Engineering; Chuo University; Kasuga 1-13-27, Bunkyo-ku 112-8551 Tokyo Japan
| | - Naoya Tokunaga
- Department of Applied Chemistry; Institute of Science and Engineering; Chuo University; Kasuga 1-13-27, Bunkyo-ku 112-8551 Tokyo Japan
| | - Shin-ichi Fukuzawa
- Department of Applied Chemistry; Institute of Science and Engineering; Chuo University; Kasuga 1-13-27, Bunkyo-ku 112-8551 Tokyo Japan
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9
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Zou Y, Melvin JE, Gonzales SS, Spafford MJ, Smith AB. Total Synthesis of (-)-Nodulisporic Acid D. J Am Chem Soc 2015; 137:7095-8. [PMID: 26029849 DOI: 10.1021/jacs.5b04728] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A convergent total synthesis of the architecturally complex indole diterpenoid (-)-nodulisporic acid D has been achieved. Key synthetic transformations include vicinal difunctionalization of an advanced α,β-unsaturated aldehyde to form the E,F-trans-fused 5,6-ring system of the eastern hemisphere and a cascade cross-coupling/indolization protocol leading to the CDE multisubstituted indole core.
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Affiliation(s)
- Yike Zou
- Department of Chemistry, Laboratory for Research on the Structure of Matter, and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Jason E Melvin
- Department of Chemistry, Laboratory for Research on the Structure of Matter, and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Stephen S Gonzales
- Department of Chemistry, Laboratory for Research on the Structure of Matter, and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Matthew J Spafford
- Department of Chemistry, Laboratory for Research on the Structure of Matter, and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Amos B Smith
- Department of Chemistry, Laboratory for Research on the Structure of Matter, and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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10
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Kulcitki V, Harghel P, Ungur N. Unusual cyclic terpenoids with terminal pendant prenyl moieties: from occurrence to synthesis. Nat Prod Rep 2015; 31:1686-720. [PMID: 25118808 DOI: 10.1039/c4np00081a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The paper reviews the known examples of cyclic terpenoids produced from open chain polyenic precursors by an "unusual" biosynthetic pathway, involving selective electrophilic attack on an internal double bond followed by cyclization. The resulting compounds possess cyclic backbones with pendant terminal prenyl groups. Synthetic approaches applied for the synthesis of such specifically functionalized compounds are also discussed, as well as biological activity of reported representatives.
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Affiliation(s)
- Veaceslav Kulcitki
- Institute of Chemistry, Moldova Academy of Sciences, Academiei str. 3, MD-2028, Chişinău, Republic of Moldova.
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11
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Mudududdla R, Sharma R, Guru SK, Kushwaha M, Gupta AP, Bharate SS, Aravinda S, Kant R, Bhushan S, Vishwakarma RA, Bharate SB. Trifluoroacetic acid catalyzed thiophenylmethylation and thioalkylmethylation of lactams and phenols via domino three-component reaction in water. RSC Adv 2014. [DOI: 10.1039/c3ra47874b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
A new method for thiophenylmethylation and thioalkylmethylation of lactams and phenols has been described.
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Affiliation(s)
- Ramesh Mudududdla
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001, India
- Academy of Scientific and Innovative Research (AcSIR)
- , India
| | - Rohit Sharma
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001, India
- Academy of Scientific and Innovative Research (AcSIR)
- , India
| | - Santosh K. Guru
- Cancer Pharmacology Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001, India
| | - Manoj Kushwaha
- Quality Control and Quality Assurance Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001, India
| | - Ajai P. Gupta
- Quality Control and Quality Assurance Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001, India
| | - Sonali S. Bharate
- Preformulation Laboratory
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001, India
| | - Subrayashastry Aravinda
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001, India
| | - Rajni Kant
- X-ray Crystallography Laboratory
- Post-Graduate Department of Physics and Electronics
- University of Jammu
- Jammu-180006, India
| | - Shashi Bhushan
- Academy of Scientific and Innovative Research (AcSIR)
- , India
- Cancer Pharmacology Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001, India
| | - Ram A. Vishwakarma
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001, India
- Academy of Scientific and Innovative Research (AcSIR)
- , India
| | - Sandip B. Bharate
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001, India
- Academy of Scientific and Innovative Research (AcSIR)
- , India
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12
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Gao S, Wang Q, Wang G, Lomenick B, Liu J, Fan CW, Deng LW, Huang J, Lum L, Chen C. The Chemistry and Biology of Nakiterpiosin - C-nor-D-Homosteroids. Synlett 2012; 16:2298-2310. [PMID: 23226922 PMCID: PMC3515072 DOI: 10.1055/s-0031-1290460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Isolated from the sponge Terpios hoshinota that causes coral black disease, nakiterpiosin was the first C-nor-D-homosteroid discovered from a marine source. We provide in this account an overview of the chemistry and biology of this natural product. We also include a short history of the synthesis of C-nor-D-homosteroids and the results of some unpublished biological studies of nakiterpiosin.
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Affiliation(s)
- Shuanhu Gao
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Qiaoling Wang
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Gelin Wang
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Brett Lomenick
- Department of Molecular and Medical Pharmacology, University of California, Los Angeles, California 90095, USA
| | - Jie Liu
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Chih-Wei Fan
- Department of Cell Biology, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA, Fax +1(214)6480320
| | - Lih-Wen Deng
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Jing Huang
- Department of Molecular and Medical Pharmacology, University of California, Los Angeles, California 90095, USA
| | - Lawrence Lum
- Department of Cell Biology, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA, Fax +1(214)6480320
| | - Chuo Chen
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
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13
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Gao S, Wang Q, Huang LJS, Lum L, Chen C. Chemical and biological studies of nakiterpiosin and nakiterpiosinone. J Am Chem Soc 2010; 132:371-83. [PMID: 20000429 DOI: 10.1021/ja908626k] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Nakiterpiosin and nakiterpiosinone are two related C-nor-D-homosteroids isolated from the sponge Terpios hoshinota that show promise as anticancer agents. We have previously described the asymmetric synthesis and revision of the relative configuration of nakiterpiosin. We now provide detailed information on the stereochemical analysis that supports our structure revision and the synthesis of the originally proposed and revised nakiterpiosin. In addition, we herein describe a refined approach for the synthesis of nakiterpiosin, the first synthesis of nakiterpiosinone, and preliminary mechanistic studies of nakiterpiosin's action in mammalian cells. Cells treated with nakiterpiosin exhibit compromised formation of the primary cilium, an organelle that functions as an assembly point for components of the Hedgehog signal transduction pathway. We provide evidence that the biological effects exhibited by nakiterpiosin are mechanistically distinct from those of well-established antimitotic agents such as taxol. Nakiterpiosin may be useful as an anticancer agent in those tumors resistant to existing antimitotic agents and those dependent on Hedgehog pathway responses for growth.
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Affiliation(s)
- Shuanhu Gao
- Department of Biochemistry, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, USA
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14
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Brennführer A, Neumann H, Beller M. Palladium-catalyzed carbonylation reactions of aryl halides and related compounds. Angew Chem Int Ed Engl 2009; 48:4114-33. [PMID: 19431166 DOI: 10.1002/anie.200900013] [Citation(s) in RCA: 1129] [Impact Index Per Article: 75.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Palladium-catalyzed carbonylation reactions of aromatic halides in the presence of various nucleophiles have undergone rapid development since the pioneering work of Heck and co-workers in 1974, such that nowadays a plethora of palladium catalysts are available for different carbonylative transformations. The carboxylic acid derivatives, aldehydes, and ketones prepared in this way are important intermediates in the manufacture of dyes, pharmaceuticals, agrochemicals, and other industrial products. In this Review, the recent academic developments in this area and the first industrial processes are summarized.
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Affiliation(s)
- Anne Brennführer
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
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15
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Brennführer A, Neumann H, Beller M. Palladiumkatalysierte Carbonylierungen von Arylhalogeniden und ähnlichen Substraten. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200900013] [Citation(s) in RCA: 372] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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16
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Neumann H, Sergeev A, Beller M. Palladium Catalysts for the Formylation of Vinyl Triflates To Form α,β-Unsaturated Aldehydes. Angew Chem Int Ed Engl 2008; 47:4887-91. [DOI: 10.1002/anie.200800994] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Neumann H, Sergeev A, Beller M. Palladium Catalysts for the Formylation of Vinyl Triflates To Form α,β-Unsaturated Aldehydes. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200800994] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Ashfield L, Barnard CFJ. Reductive Carbonylation − an Efficient and Practical Catalytic Route for the Conversion of Aryl Halides to Aldehydes. Org Process Res Dev 2006. [DOI: 10.1021/op060193w] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Laura Ashfield
- Johnson Matthey Technology Centre, Blounts Court, Sonning Common, Reading RG4 9NH, UK
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19
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Smith AB, Davulcu AH, Kürti L. Indole Diterpenoid Synthetic Studies. The Total Synthesis of (+)-Nodulisporic Acid F. Org Lett 2006; 8:1665-8. [PMID: 16597136 DOI: 10.1021/ol060290+] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[structure: see text] A stereocontrolled total synthesis of (+)-nodulisporic acid F, the simplest member of a family of novel ectoparasiticidal agents, has been achieved. Highlights of the effective modular synthetic strategy include anionic union of a tricyclic lactone with o-toluidine via our 2-substituted indole synthetic protocol, an optimized C-ring construction protocol, and a late-stage installation of the alpha,beta-unsaturated carboxylic acid side chain via the B-alkyl Suzuki-Miyaura cross-coupling tactic.
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Affiliation(s)
- Amos B Smith
- Department of Chemistry, Monell Chemical Senses Center and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
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20
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Chakravarty PK, Shih TL, Colletti SL, Ayer MB, Snedden C, Kuo H, Tyagarajan S, Gregory L, Zakson-Aiken M, Shoop WL, Schmatz DM, Wyvratt M, Fisher MH, Meinke PT. Nodulisporic acid side-chain modifications: access to the 2", 3", 4", and 6" registers. Bioorg Med Chem Lett 2003; 13:147-50. [PMID: 12467636 DOI: 10.1016/s0960-894x(02)00826-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Efficient routes to access the 2", 3", 4", and 6" registers of the nodulisporic acid (NsA) side chain are disclosed. A mild one-carbon, Ph(2)CdoublebondNCH(2)CtriplebondN mediated homologation of NsA's 3"-aldehyde permitted access to the 4"-register. Curtius reaction of NsA's 3"-acid yielded the corresponding 2"-aldehyde 4 from which the unnatural Delta(2",3")-olefin isomer 2b was obtained. In addition, Arndt-Eistert reactions of the parent NsA permitted a one-carbon homologation to the 6" register. These efforts identified new analogues with significant flea activity and illustrated the biological significance of unsaturation at the 1",2" register.
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Affiliation(s)
- Prasun K Chakravarty
- Merck Research Laboratories, PO Box 2000, RY800-B101, Rahway, NJ 07065-0900, USA
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Sings H, Singh S. Tremorgenic and nontremorgenic 2,3-fused indole diterpenoids. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2003; 60:51-163. [PMID: 14593856 DOI: 10.1016/s0099-9598(03)60002-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Ok D, Li C, Shih TL, Salva S, Ayer MB, Colletti SL, Chakravarty PK, Wyvratt MJ, Fisher MH, Gregory L, Zakson-Aiken M, Shoop WL, Schmatz DM, Meinke PT. Side-chain homologation of nodulisporic acid: synthesis of potent new dienyl derivatives. Bioorg Med Chem Lett 2002; 12:1751-4. [PMID: 12067553 DOI: 10.1016/s0960-894x(02)00284-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A series of new, diene-modified nodulisporic acid analogues (2) bearing diverse functionality at the 3"- and 4"-sites was efficiently prepared from the 3"-aldehyde 3. Biological evaluation of these synthetic nodulisporic acid analogues for systemic flea efficacy identified potent compounds and further clarified the structural requirements for ectoparasite activity.
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Affiliation(s)
- Dong Ok
- Merck Research Laboratories, PO Box 2000, Rahway, NJ 07065-0900, USA
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Chapter 5.2 Five membered ring systems: Pyrroles and benzo derivatives. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s0959-6380(02)80008-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Smith AB, Ishiyama H, Cho YS, Ohmoto K. Nodulisporic acid A synthetic studies. 1. Overall strategy and construction of a western hemisphere subtarget. Org Lett 2001; 3:3967-70. [PMID: 11720581 DOI: 10.1021/ol0168871] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this, the first of two Letters, we outline our overall strategy for the construction of (+)-nodulisporic acid A (1), a representative member of a new class of indole diterpenes. In addition, we describe the efficient assembly of (-)-6, an advanced western hemisphere subtarget, comprising the ABC rings of (+)-nodulisporic acid A (1). The synthesis proceeded in 9% overall yield (longest linear sequence, 11 steps), exploiting a Shibasaki-Mori tandem transmetalation-cyclization to construct ring B. [reaction: see text]
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Affiliation(s)
- A B Smith
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
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