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Roy CP, Karmakar S, Dash J. Synthesis of Phenanthrenes and 1-Hydroxyphenanthrenes via Aromatization-Assisted Ring-Closing Metathesis: toward Polynuclear Aromatic Hydrocarbons. J Org Chem 2024. [PMID: 39007427 DOI: 10.1021/acs.joc.4c00723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
This study presents an efficient synthetic strategy for phenanthrenes and 1-hydroxyphenanthrenes through aromatization-assisted ring-closing metathesis (RCM). It involves vinylation of 1-bromo-2-naphthaldehyde derivatives, Barbier allylation, and subsequent one-pot RCM/dehydration of the diene precursors to yield phenanthrene derivatives. Further, the corresponding keto analogues of diene precursors produce 1-hydroxyphenanthrenes through RCM and aromatization-driven keto-enol tautomerism. This pathway enables rapid access to a diverse array of functionalized phenanthrenes and 1-hydroxyphenanthrenes, including synthetically challenging derivatives containing both -OH and -OMe groups via the sequential construction of the terminal phenanthrene ring.
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Affiliation(s)
- Charles Patriot Roy
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Shilpi Karmakar
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Jyotirmayee Dash
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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2
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Kim IJ, Pilkington LI, Barker D. Total Synthesis of (-)-Amovillosumin A and Structure Correction of (-)-Amovillosumin C Using Chemical Synthesis. JOURNAL OF NATURAL PRODUCTS 2024; 87:340-348. [PMID: 38354299 DOI: 10.1021/acs.jnatprod.3c01069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Norlignans are a rare class of natural products isolated from a diverse range of plant species, many of which have interesting biological activities including antibacterial, antioxidant, phytotoxic, platelet aggregation inhibitory effects, and more. Isolated from Amomum villosum (Amomi Fructus), amovillosumins A (1) and C (3) are norlignans which were of interest to synthesize, due to their interesting bioactivities, specifically their ability to increase stimulation of glucagon-like peptide-1 (GLP-1) secretion. In this research, key intermediate 15 was used to stereoselectively synthesize (7R,8R)-amovillosumins A (1) and C (3). The developed method includes a Mitsunobu coupling, a modified rhodium-catalyzed Miyaura arylation, and an acid-catalyzed cyclization in key bond-forming steps. After synthesis, the structure of 1 was confirmed, but it was revealed that the benzodioxane-containing structure of amovillosumin C (3) that had been proposed in the literature was incorrect. Thus, with further investigation a structure correction of 3 was achieved by synthesis, the correct structure being 8-O-4'-oxynorlignan.
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Affiliation(s)
- Irene Jeongin Kim
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
| | - Lisa I Pilkington
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
- Te Pu̅naha Matatini, Auckland 1010, New Zealand
| | - David Barker
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6140, New Zealand
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3
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Bailly C. Fissistigma oldhamii (Hemsl.) Merr.: Ethnomedicinal, Phytochemistry, and Pharmacological Aspects. PLANTS (BASEL, SWITZERLAND) 2023; 12:4094. [PMID: 38140421 PMCID: PMC10748316 DOI: 10.3390/plants12244094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 11/29/2023] [Accepted: 12/04/2023] [Indexed: 12/24/2023]
Abstract
The species Fissistigma oldhamii (Hemsl.) Merr. (Annonaceae) has long been used as a traditional herbal medicine in China to treat diverse human diseases. Decoctions from the roots of the plant (Guā Fù Mù) are used to treat body pain and inflammatory pathologies, such as rheumatic syndromes, sciatica, and osteoarthritis. The phytochemical content of the plant and the associated pharmacological activities have been analyzed. Seventy natural products were identified in the different parts of the plants, namely, the roots, stems, leaves, fruits, and seeds. The compounds comprise many tri- and tetracyclic alkaloids (aporphine-type), anthraquinones, terpenoids, flavonoids, and others. The pharmacological properties of these molecules were analyzed to point out the anti-inflammatory, antioxidant, anticancer, and/or antimicrobial effects, together with the underlying modulated pathways and molecular targets in some cases. The panel of phytoconstituents present in F. oldhamii extracts is large, with the majority of bioactive products identified in the roots and stems. Multiple molecules can contribute to the anti-inflammatory properties of the extracts. Network pharmacology analyses of the phytoconstituents are needed to better delineate the effective components and their targets.
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Affiliation(s)
- Christian Bailly
- CNRS, Inserm, CHU Lille, UMR9020-U1277-CANTHER—Cancer Heterogeneity Plasticity and Resistance to Therapies, OncoLille Institut, University of Lille, 59000 Lille, France;
- Institute of Pharmaceutical Chemistry Albert Lespagnol (ICPAL), Faculty of Pharmacy, University of Lille, 59006 Lille, France
- OncoWitan, Scientific Consulting Office, 59290 Lille, France
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4
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Bak JM, Song M, Shin I, Lim HN. A deconstruction-reconstruction strategy to access 1-naphthol derivatives: application to the synthesis of aristolactam scaffolds. Org Biomol Chem 2023; 21:8936-8941. [PMID: 37916683 DOI: 10.1039/d3ob01603j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
A deconstruction-reconstruction strategy for the synthesis of multisubstituted polycyclic aromatic hydrocarbons (PAHs) is delineated herein. The deconstruction step enables the synthesis of o-cyanomethylaroyl fluorides that are bifunctional substrates holding both a pro-nucleophile and an electrophile. The construction step involves a formal [4 + 2] benzannulation using o-cyanomethylaroyl fluorides and active methylenes. The utility of this synthetic method is also demonstrated by the synthesis of a tetracyclic aristolactam derivative.
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Affiliation(s)
- Jeong Min Bak
- Department of Chemistry, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
| | - Moonyeong Song
- Department of Fine Chemistry, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Republic of Korea
| | - Inji Shin
- Department of Fine Chemistry, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Republic of Korea
| | - Hee Nam Lim
- Department of Chemistry, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
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5
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Kim IJ, Pilkington LI, Barker D. Total Synthesis of Linear Coumarniolignoids (+) and (-)-Sapiumin C, (-)-Moluccanin, and (-)-Hemidesminine. J Org Chem 2023; 88:5900-5912. [PMID: 37071826 DOI: 10.1021/acs.joc.3c00292] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2023]
Abstract
Coumarinolignoids (CLs) are a class of natural products isolated from a diverse range of plant species. Due to their unique structural scaffold, they exhibit a wide range of interesting biological activities including hepatoprotective, antitumor, anti-inflammatory, and antioxidant activities among others. In this research, key intermediate 10 was used to stereoselectively synthesize CLs (7'S,8'S)- and (7'R,8'R)-sapiumin C 1 and 2, (7'S,8'S)-moluccanin 3, and (7'S,8'S) hemidesminine 4 for the first time, establishing a versatile synthetic method for the stereoselective synthesis of linear CLs. The developed method includes a Mitsunobu coupling, a modified Miyaura arylation via a rhodium catalyst, and an acid-catalyzed cyclization in key bond-forming steps. The developed synthetic route allows the synthesis of both enantiomers of a given natural product from the same chiral pool reagent (S)-solketal while allowing easy variation of aromatic substitution and hydroxymethyl/allylhydroxymethyl moieties that are common in this class of natural products.
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Affiliation(s)
- Irene Jeongin Kim
- School of Chemical Sciences, University of Auckland, 23 Symonds St, Auckland 1142, New Zealand
| | - Lisa I Pilkington
- School of Chemical Sciences, University of Auckland, 23 Symonds St, Auckland 1142, New Zealand
- Te Pu̅naha Matatini, Auckland 1142, New Zealand
| | - David Barker
- School of Chemical Sciences, University of Auckland, 23 Symonds St, Auckland 1142, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6021, New Zealand
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6
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Munawar S, Zahoor AF, Ali S, Javed S, Irfan M, Irfan A, Kotwica-Mojzych K, Mojzych M. Mitsunobu Reaction: A Powerful Tool for the Synthesis of Natural Products: A Review. Molecules 2022; 27:6953. [PMID: 36296545 PMCID: PMC9609662 DOI: 10.3390/molecules27206953] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/06/2022] [Accepted: 10/08/2022] [Indexed: 08/13/2023] Open
Abstract
The Mitsunobu reaction plays a vital part in organic chemistry due to its wide synthetic applications. It is considered as a significant reaction for the interconversion of one functional group (alcohol) to another (ester) in the presence of oxidizing agents (azodicarboxylates) and reducing agents (phosphines). It is a renowned stereoselective reaction which inverts the stereochemical configuration of end products. One of the most important applications of the Mitsunobu reaction is its role in the synthesis of natural products. This review article will focus on the contribution of the Mitsunobu reaction towards the total synthesis of natural products, highlighting their biological potential during recent years.
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Affiliation(s)
- Saba Munawar
- Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan
| | - Ameer Fawad Zahoor
- Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan
| | - Shafaqat Ali
- College of Agriculture and Environmental Sciences, Government College University Faisalabad, Faisalabad 38000, Pakistan
| | - Sadia Javed
- Department of Biochemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan
| | - Muhammad Irfan
- Department of Pharmaceutics, Government College University Faisalabad, Faisalabad 38000, Pakistan
| | - Ali Irfan
- Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan
| | - Katarzyna Kotwica-Mojzych
- Laboratory of Experimental Cytology, Medical University of Lublin, Radziwiłłowska 11, 20-080 Lublin, Poland
| | - Mariusz Mojzych
- Department of Chemistry, Siedlce University of Natural Sciences and Humanities, 3-go Maja 54, 08-110 Siedlce, Poland
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7
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Gryl M, Ostrowska K, Barquera-Lozada JE, Stadnicka KM. Unveiling the Impact of Aggregation on Optical Anisotropy of Triazaacephenanthrylene Single Crystals. A Combined Quantum Crystallography and Conceptual Density Functional Theory Approach. J Phys Chem A 2020; 124:2931-2941. [PMID: 32135065 PMCID: PMC7497651 DOI: 10.1021/acs.jpca.9b10651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Triazaacephenanthrylene
(TAAP) triclinic single crystals show substantial
optical anisotropy of absorption and fluorescence. The maximum effect
can be correlated with the direction perpendicular to the plane of
chromophores connected in a head-to-tail manner via weak dispersive
interactions. This phenomenon is uncommon as usually the existence
of postulated π···π interactions between
the molecules forming dimers or stacks cause quenching of fluorescence.
Herein we present a comprehensive study of inter- and intramolecular
interactions in the crystal of TAAP enriched with the investigation
of aromaticity. Our results show that intramolecular interactions
stabilize the overall conformation of the molecule whereas dispersive
forces determine the aggregation between TAAP molecules. In fact,
there is no conventional π···π interaction
between the molecules in the dimer. Instead, we observed a close contact
between the lone pair of the bridgehead N10B atom and π-deficient
pyrazine ring from an adjacent molecule. Optical anisotropy in TAAP
crystals was directly correlated with the alignment of the molecular
transition dipole moments caused by specific molecular self-assembly.
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Affiliation(s)
- Marlena Gryl
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Katarzyna Ostrowska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Jose Enrique Barquera-Lozada
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito exterior, Ciudad Universitaria Coyoacán, México, DF 04510, Mexico
| | - Katarzyna M Stadnicka
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
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