1
|
Badmus F, Thombal RS, Philkhana SC, Malone JA, Bailey CE, Armendariz-Gonzalez E, Mureka EW, Locicero CM, Fronczek FR, Kartika R. Directing the Stereoselectivity of the Claisen Rearrangement to Form Cyclic Ketones with Full Substitution at the α-Positions. Org Lett 2023; 25:7622-7627. [PMID: 37830497 PMCID: PMC10616857 DOI: 10.1021/acs.orglett.3c02752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Indexed: 10/14/2023]
Abstract
We report an enantioselective synthesis of cyclic ketones with full substitutions at the α-positions in a highly diastereoselective manner. Our method is achieved by subjecting substrate motifs in 2-allyloxyenones to chiral organomagnesium reagents, which trigger the Claisen rearrangement upon direct 1,2-carbonyl addition. The observed diastereoselectivity of the allyl migration is proposed to originate from the intramolecular chelation of the magnesium alkoxide to the allyloxy moiety.
Collapse
Affiliation(s)
- Fatimat
O. Badmus
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton
Rouge, Louisiana 70803, United States
| | | | | | - Joshua A. Malone
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton
Rouge, Louisiana 70803, United States
| | - Christian E. Bailey
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton
Rouge, Louisiana 70803, United States
| | | | - Edward W. Mureka
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton
Rouge, Louisiana 70803, United States
| | - Cale M. Locicero
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton
Rouge, Louisiana 70803, United States
| | - Frank R. Fronczek
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton
Rouge, Louisiana 70803, United States
| | - Rendy Kartika
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton
Rouge, Louisiana 70803, United States
| |
Collapse
|
2
|
Hagiwara H. Recent Progress in the Synthesis of Sesquiterpenoid Involving Spirocyclic Carbon Framework. Nat Prod Commun 2023. [DOI: 10.1177/1934578x231156702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
Spirocarbocyclic natural products have been attracting considerable attention from synthetic organic chemists. This review focused on total syntheses of sesquiterpenoids involving spiro[4.5]decane and spiro[5.5]undecane scaffolds, compiling syntheses of colletoic acid, cubebol, axenol, vetispirene, hinesol, agarospirol, axenol, gleenol, exiguamide, exigurin, erythrodiene, spirojatamol, antroalbocin A, omphalic acid, dactylone, and aplydactonee since 2015.
Collapse
Affiliation(s)
- Hisahiro Hagiwara
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
| |
Collapse
|
3
|
Interrupted Nef and Meyer Reactions: A Growing Point for Diversity-Oriented Synthesis Based on Nitro Compounds. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020686. [PMID: 36677743 PMCID: PMC9860707 DOI: 10.3390/molecules28020686] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 12/27/2022] [Accepted: 12/30/2022] [Indexed: 01/13/2023]
Abstract
The Nef reaction (nitro to carbonyl group conversion) and related Meyer reaction are among the key transformations of aliphatic nitro compounds. The interrupted versions of these reactions in which the normal pathway is redirected to a different end product by an external nucleophile are much less common, albeit these processes substantially increase the synthetic potential of nitro compounds. In this review, examples of interrupted Nef and Meyer reactions are summarized, and the prospects of this methodology in diversity-oriented organic synthesis are analyzed. The bibliography contains 90 references.
Collapse
|
4
|
Isoda M, Sato K, Kameda K, Wakabayashi K, Sato R, Minami H, Karuo Y, Tarui A, Kawai K, Omote M. Rhodium-catalyzed intramolecular reductive aldol-type cyclization: Application for the synthesis of a chiral necic acid lactone. Beilstein J Org Chem 2022; 18:1642-1648. [DOI: 10.3762/bjoc.18.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 11/18/2022] [Indexed: 12/05/2022] Open
Abstract
A rhodium-catalyzed intramolecular reductive aldol-type cyclization is described to give β-hydroxylactones with high diastereoselectivities. The stereoselectivity of this cyclization is highly solvent dependent and can give syn- or anti-β-hydroxylactones with high diastereoselectivity. This methodology was also applied to the synthesis of a chiral necic acid lactone which is a structural component of the pyrrolizidine alkaloid monocrotaline.
Collapse
|
5
|
Siekmeyer B, Lübken D, Bajerke K, Bernhardt B, Schreiner PR, Kalesse M. Total Synthesis of (-)-Antroalbocin A Enabled by a Strain Release-Controlled Photochemical 1,3-Acyl Shift. Org Lett 2022; 24:5812-5816. [PMID: 35912985 DOI: 10.1021/acs.orglett.2c02347] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first bioinspired, enantioselective, and protecting group free total synthesis of the antibacterial sesquiterpenoid (-)-antroalbocin A (1) has been achieved in 12 steps (5.4% overall yield) from dimedone. An organocatalytic Robinson annulation gave rapid access to the tricyclic enone (19) as starting material for the photochemical domino process of deconjugation and sigmatropic 1,3-acyl shift. Computational data of this process indicate that the 1,3-acyl shift benefits from the highly strained 1,3-enone 8. The transformation of 8 to its bridged isomer 5 is exergonic and, therefore, enables an increased conversion compared to unstrained substrates.
Collapse
Affiliation(s)
- Björn Siekmeyer
- Institute of Organic Chemistry, Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany
| | - Dennis Lübken
- Institute of Organic Chemistry, Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany
| | - Kevin Bajerke
- Institute of Organic Chemistry, Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany
| | - Bastian Bernhardt
- Institute of Organic Chemistry, Justus Liebig University, 35392 Giessen, Germany
| | - Peter R Schreiner
- Institute of Organic Chemistry, Justus Liebig University, 35392 Giessen, Germany
| | - Markus Kalesse
- Institute of Organic Chemistry, Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany.,Helmholtz Centre for Infection Research (HZI), 38124 Braunschweig, Germany
| |
Collapse
|
6
|
Ali R, Ahmed W, Jayant V, alvi S, Ahmed N, Ahmed A. Metathesis reactions in total‐ and natural product fragments syntheses. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100753] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rashid Ali
- Jamia Millia Islamia New Delhi India 110025 Department of Chemistry Jamia Nagar,New Delhi india110025 110025 New Delhi INDIA
| | - Waqar Ahmed
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - Vikrant Jayant
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - shakeel alvi
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - Nadeem Ahmed
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - Azeem Ahmed
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| |
Collapse
|
7
|
Convenient preparation of synthetically useful chiral quaternary carbon-containing bicyclic compounds with organocatalysts. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153495] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
8
|
Abstract
This review covers the literature published between January and December in 2018 for marine natural products (MNPs), with 717 citations (706 for the period January to December 2018) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1554 in 469 papers for 2018), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that led to the revision of structures or stereochemistries, have been included. The proportion of MNPs assigned absolute configuration over the last decade is also surveyed.
Collapse
Affiliation(s)
- Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Australia. and Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia and School of Environment and Science, Griffith University, Brisbane, Australia
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - Michèle R Prinsep
- Chemistry, School of Science, University of Waikato, Hamilton, New Zealand
| |
Collapse
|
9
|
Yoshimura T, Umeda Y, Takahashi R, Matsuo JI. Development of Nitrolactonization Mediated by Iron(III) Nitrate Nonahydrate. Chem Pharm Bull (Tokyo) 2020; 68:1220-1225. [PMID: 33268654 DOI: 10.1248/cpb.c20-00645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The nitrolactonization of alkenyl carboxylic acids mediated by Fe(NO3)3·9H2O has been developed. Nitrolactones were obtained in up to 93% yield by treatment of alkenyl carboxylic acids with Fe(NO3)3·9H2O. Mechanistic studies disclosed that the reaction proceeded through a radical intermediate generated from addition of NO2 to alkenyl carboxylic acids.
Collapse
Affiliation(s)
- Tomoyuki Yoshimura
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University
| | - Yuki Umeda
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University
| | - Risako Takahashi
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University
| | - Jun-Ichi Matsuo
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University
| |
Collapse
|
10
|
Kawamoto Y, Ozone D, Kobayashi T, Ito H. Enantioselective Total Synthesis of Chondrosterins I and J by Catalytic Asymmetric Intramolecular Aldol Reaction Using Chiral Diamine Catalyst. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000579] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yuichiro Kawamoto
- School of Life Sciences; Tokyo University of Pharmacy and Life Sciences; 1432-1 Horinouchi, Hachioji 192-0392 Tokyo Japan
| | - Daiki Ozone
- School of Life Sciences; Tokyo University of Pharmacy and Life Sciences; 1432-1 Horinouchi, Hachioji 192-0392 Tokyo Japan
| | - Toyoharu Kobayashi
- School of Life Sciences; Tokyo University of Pharmacy and Life Sciences; 1432-1 Horinouchi, Hachioji 192-0392 Tokyo Japan
| | - Hisanaka Ito
- School of Life Sciences; Tokyo University of Pharmacy and Life Sciences; 1432-1 Horinouchi, Hachioji 192-0392 Tokyo Japan
| |
Collapse
|
11
|
Kotha S, Keesari RR, Fatma A, Gunta R. Synthetic Strategies to Diverse Polyquinanes via Olefin Metathesis: Access to the Basic Core of Crinipellin, Presilphiperfolanol, and Cucumin. J Org Chem 2020; 85:851-863. [PMID: 31802663 DOI: 10.1021/acs.joc.9b02829] [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 rapid and useful synthetic approach to various polyquinane-based natural products was accomplished efficiently by employing ring-rearrangement metathesis and ring-closing metathesis as key steps. Here, we report the synthesis of stereochemically well-defined cis-anti-cis triquinanes (1, 2), tetraquinanes (3, 4), a novel pentaquinane 5, and fused [5-5-5-6] tetracyclic systems (6, 7) that are present in crinipellin, presilphiperfolanol, cucumin, etc. Hence, the current strategy may be suitable for the synthesis of various complex natural and unnatural cyclopentanoid targets. Moreover, our approach to the newly synthesized pentaquinane 5 has paved the way for various complex polyquinanes/molecules having significant applications in theoretical and medicinal chemistry.
Collapse
Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry , Indian Institute of Technology-Bombay , Powai , Mumbai 400 076 , India
| | | | - Ambareen Fatma
- Department of Chemistry , Indian Institute of Technology-Bombay , Powai , Mumbai 400 076 , India
| | - Rama Gunta
- Department of Chemistry , Indian Institute of Technology-Bombay , Powai , Mumbai 400 076 , India
| |
Collapse
|
12
|
Kobayashi T, Abe H, Ito H. Synthetic Studies of Polycyclic Terpenoids Using the Intramolecular Aldol-Type Cyclization Reaction. J SYN ORG CHEM JPN 2019. [DOI: 10.5059/yukigoseikyokaishi.77.1086] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Hideki Abe
- Department of Chemical and Biological Sciences, Faculty of Science, Japan Women’s University
| | - Hisanaka Ito
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences
| |
Collapse
|