1
|
Xue F, Yang CJ, Tang T, He Z. Sequential annulation and isomerisation reaction of 3-acylmethylidene oxindoles with Huisgen zwitterions and synthesis of 5-(3-oxindolyl)oxazoles. Org Biomol Chem 2023; 21:8176-8181. [PMID: 37786314 DOI: 10.1039/d3ob01199b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
Herein, we report a facile synthesis of 5-(3-oxindolyl)oxazole derivatives via a sequential annulation and isomerisation reaction of 3-acylmethylidene oxindoles with in situ generated Huisgen zwitterions (HZs) from PPh3 and azodicarboxylates. This reaction exhibits good functional group tolerance with 30 examples of structurally diverse products prepared with moderate to good efficiencies (up to 88% yield), thus providing a generally applicable route to the biologically important 5-(3-indolyl)oxazole structural motifs. Key to the success of this sequential one-pot strategy is the utilization of DBU as a base to promote the isomerisation process of the corresponding intermediate annulation products.
Collapse
Affiliation(s)
- Feixue Xue
- The State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China.
| | - Chang-Jiang Yang
- Department of Chemistry, School of Sciences, Great Bay University, Dongguan 523000, China
- The Dongguan Key Laboratory for Data Science and Intelligent Medicine, Dongguan 523000, China.
| | - Tong Tang
- The State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China.
| | - Zhengjie He
- The State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China.
| |
Collapse
|
2
|
Savelson E, Tepe JJ. One-Pot Friedel-Crafts/Robinson-Gabriel Synthesis of the Indole-Oxazole Scaffold and Its Application to the Synthesis of Breitfussins C, G, and H. J Org Chem 2023; 88:755-761. [PMID: 35235750 DOI: 10.1021/acs.joc.2c00033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The indole-oxazole scaffold is found in a range of biologically active natural products, including the breitfussin family. Divergent methods that provide access to the indole-oxazole template are relatively scarce, which impedes the wider exploration of these natural products and their exciting biological activity. Herein, we describe a highly divergent synthesis of the indole-oxazole scaffold via a one-pot Friedel-Crafts/Robinson-Gabriel synthesis and the application of this methodology to the synthesis of breitfussins C, G, and H.
Collapse
Affiliation(s)
- Evan Savelson
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48823, United States
| | - Jetze J Tepe
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48823, United States
| |
Collapse
|
3
|
Gribble GW. Naturally Occurring Organohalogen Compounds-A Comprehensive Review. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2023; 121:1-546. [PMID: 37488466 DOI: 10.1007/978-3-031-26629-4_1] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
The present volume is the third in a trilogy that documents naturally occurring organohalogen compounds, bringing the total number-from fewer than 25 in 1968-to approximately 8000 compounds to date. Nearly all of these natural products contain chlorine or bromine, with a few containing iodine and, fewer still, fluorine. Produced by ubiquitous marine (algae, sponges, corals, bryozoa, nudibranchs, fungi, bacteria) and terrestrial organisms (plants, fungi, bacteria, insects, higher animals) and universal abiotic processes (volcanos, forest fires, geothermal events), organohalogens pervade the global ecosystem. Newly identified extraterrestrial sources are also documented. In addition to chemical structures, biological activity, biohalogenation, biodegradation, natural function, and future outlook are presented.
Collapse
Affiliation(s)
- Gordon W Gribble
- Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA.
| |
Collapse
|
4
|
Jadhav KA, Bhosle SD, Itage SV, Bhosale RS, Eppa G, Singh Yadav J. A novel method for the synthesis of 2-oxazolines. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
5
|
Lokolkar MS, Mane PA, Dey S, Bhanage BM. Synthesis of 2‐substituted indoles by Pd‐Catalyzed reductive cyclization of 1‐halo‐2‐nitrobenzene with alkynes. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Manjunath S. Lokolkar
- Institute of Chemical Technology Department of Chemistry Chemistry 400019 Mumbai INDIA
| | - Pravin A. Mane
- Bhabha Atomic Research Centre Chemistry Division 400085 Mumbai INDIA
| | - Sandip Dey
- Bhabha Atomic Research Centre Chemistry Division 400085 Mumbai INDIA
| | - Bhalchandra M. Bhanage
- Institute of Chemical Technology Department of Chemistry Nathalal Parekh MargMatunga (East)MumbaiMaharashtra 400019 Mumbai INDIA
| |
Collapse
|
6
|
Tan DX, Han FS. The application of C–H bond functionalization in the total syntheses of indole natural products. Org Chem Front 2022. [DOI: 10.1039/d1qo01636a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The recent advances in total synthesis of indole natural products focusing on the application of C–H bond functionalization are summarized.
Collapse
Affiliation(s)
- Dong-Xing Tan
- CAS Key Lab of High-Performance Synthetic Rubber and its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022, China
| | - Fu-She Han
- CAS Key Lab of High-Performance Synthetic Rubber and its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022, China
| |
Collapse
|
7
|
Chen J, Lv S, Liu J, Yu Y, Wang H, Zhang H. An Overview of Bioactive 1,3-Oxazole-Containing Alkaloids from Marine Organisms. Pharmaceuticals (Basel) 2021; 14:ph14121274. [PMID: 34959674 PMCID: PMC8706051 DOI: 10.3390/ph14121274] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/30/2021] [Accepted: 12/01/2021] [Indexed: 11/20/2022] Open
Abstract
1,3-Oxazole chemicals are a unique class of five-membered monocyclic heteroarenes, containing a nitrogen atom and an oxygen. These alkaloids have attracted extensive attention from medicinal chemists and pharmacologists owing to their diverse arrays of chemical structures and biological activities, and a series of 1,3-oxazole derivatives has been developed into therapeutic agents (e.g., almoxatone, befloxatone, cabotegravir, delpazolid, fenpipalone, haloxazolam, inavolisib). A growing amount of evidence indicates that marine organisms are one of important sources of 1,3-oxazole-containing alkaloids. To improve our knowledge regarding these marine-derived substances, as many as 285 compounds are summarized in this review, which, for the first time, highlights their sources, structural features and biological properties, as well as their biosynthesis and chemical synthesis. Perspective for the future discovery of new 1,3-oxazole compounds from marine organisms is also provided.
Collapse
Affiliation(s)
- Jinyun Chen
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China; (J.C.); (S.L.); (J.L.); (H.W.)
| | - Sunyan Lv
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China; (J.C.); (S.L.); (J.L.); (H.W.)
| | - Jia Liu
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China; (J.C.); (S.L.); (J.L.); (H.W.)
| | - Yanlei Yu
- Collaborative Innovation Center of Green Pharmaceutics of Delta Yangzi Region, Zhejiang University of Technology, Hangzhou 310014, China;
| | - Hong Wang
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China; (J.C.); (S.L.); (J.L.); (H.W.)
| | - Huawei Zhang
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China; (J.C.); (S.L.); (J.L.); (H.W.)
- Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province, Hangzhou 310014, China
- Correspondence:
| |
Collapse
|
8
|
Seipp K, Geske L, Opatz T. Marine Pyrrole Alkaloids. Mar Drugs 2021; 19:514. [PMID: 34564176 PMCID: PMC8471394 DOI: 10.3390/md19090514] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 09/05/2021] [Accepted: 09/07/2021] [Indexed: 12/13/2022] Open
Abstract
Nitrogen heterocycles are essential parts of the chemical machinery of life and often reveal intriguing structures. They are not only widespread in terrestrial habitats but can also frequently be found as natural products in the marine environment. This review highlights the important class of marine pyrrole alkaloids, well-known for their diverse biological activities. A broad overview of the marine pyrrole alkaloids with a focus on their isolation, biological activities, chemical synthesis, and derivatization covering the decade from 2010 to 2020 is provided. With relevant structural subclasses categorized, this review shall provide a clear and timely synopsis of this area.
Collapse
Affiliation(s)
| | | | - Till Opatz
- Department of Chemistry, Organic Chemistry Section, Johannes Gutenberg University, Duesbergweg 10–14, 55128 Mainz, Germany; (K.S.); (L.G.)
| |
Collapse
|
9
|
Shrestha UK, Golliher AE, Newar TD, Holguin FO, Maio WA. Asymmetric Total Synthesis and Revision of Absolute Stereochemistry for (+)-Taumycin A: An Approach that Exploits Orthogonally Protected Quasienantiomers. J Org Chem 2021; 86:11086-11099. [PMID: 33444024 DOI: 10.1021/acs.joc.0c02820] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first asymmetric total synthesis of C(9)-S-(+)-taumycin A is now reported using an approach that targeted both C(9) diastereomers concurrently. To facilitate this work, we called upon the symmetrical nature of a C(5)-C(13) side-chain intermediate and exploited orthogonal protecting groups as a tactic to access both stereoisomers from a single chiral, nonracemic intermediate. In addition to our successful approach, several minor detours that helped refine our strategy and a detailed analysis of 1H NMR data will be discussed. Select compounds included in this work were screened against the NCI60 cell line panel and displayed modest growth inhibition activity.
Collapse
Affiliation(s)
| | | | | | | | - William A Maio
- New Mexico State University, Department of Chemistry and Biochemistry, Las Cruces, New Mexico 88003, United States
| |
Collapse
|
10
|
Nabi AA, Scott LM, Furkert DP, Sperry J. Synthetic studies toward inducamide C. Org Biomol Chem 2021; 19:416-420. [PMID: 33313627 DOI: 10.1039/d0ob01995j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The alkaloid inducamide C is proposed to contain a very rare benzoxazepine ring. Herein, we report that the benzoxazepine ring in inducamide C is unstable and prone to rearrangement, indicating that structural revision of the natural product may be necessary. In a first-generation synthetic approach, attempts to assemble the benzoxazepine by cyclization of 4-hydroxyinducamide A led to the regioisomeric oxepanoindole, a result of the 4-hydroxyindole (C4-OH) undergoing preferential cyclization instead of the desired chlorosalicylic acid C15-OH. A second-generation approach involved dealkylation of O-isopropylinducamide C, but the same oxepanoindole formed via rearrangement of the proposed inducamide C structure. Computational studies validate preferential formation of the oxepanoindole and the lactone in O-isopropylinducamide C is susceptible to nucleophilic attack. Thus, inducamide C is either highly unstable or in need of structural revision.
Collapse
Affiliation(s)
- Ardalan A Nabi
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand.
| | - Lydia M Scott
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand.
| | - Daniel P Furkert
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand.
| | - Jonathan Sperry
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand.
| |
Collapse
|
11
|
Wang Y, He Q, Fan R. Facile synthesis of 4-acetoxyindoles via PhI(OAc) 2-mediated dearomatization of 2-alkynylanilines. Org Chem Front 2021. [DOI: 10.1039/d1qo00358e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A simple process for rapid synthesis of 4-aetoxyindoles from readily available 2-alkynylanilines via dearomatization was reported.
Collapse
Affiliation(s)
- Yue Wang
- Department of Chemistry
- Fudan University
- Shanghai
- China
| | - Qiuqin He
- Department of Chemistry
- Fudan University
- Shanghai
- China
| | - Renhua Fan
- Department of Chemistry
- Fudan University
- Shanghai
- China
| |
Collapse
|
12
|
Singh N, Singh S, Kohli S, Singh A, Asiki H, Rathee G, Chandra R, Anderson EA. Recent progress in the total synthesis of pyrrole-containing natural products (2011–2020). Org Chem Front 2021. [DOI: 10.1039/d0qo01574a] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review discusses total syntheses of pyrrole-containing natural products over the last ten years, highlighting recent advances in the chemistry of pyrroles in the context of their innate reactivity, and their preparation in complex settings.
Collapse
Affiliation(s)
- Nidhi Singh
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Snigdha Singh
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Sahil Kohli
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Aarushi Singh
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Hannah Asiki
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Garima Rathee
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Ramesh Chandra
- Department of Chemistry, University of Delhi, Delhi 110007, India
- Dr B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India
| | - Edward A. Anderson
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| |
Collapse
|
13
|
Guttormsen Y, Fairhurst ME, Pandey SK, Isaksson J, Haug BE, Bayer A. Total Synthesis of Phorbazole B. Molecules 2020; 25:molecules25204848. [PMID: 33096668 PMCID: PMC7588006 DOI: 10.3390/molecules25204848] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Revised: 10/14/2020] [Accepted: 10/18/2020] [Indexed: 11/29/2022] Open
Abstract
Phorbazoles are polychlorinated heterocyclic secondary metabolites isolated from a marine sponge and several of these natural products have shown inhibitory activity against cancer cells. In this work, a synthesis of the trichlorinated phorbazole B using late stage electrophilic chlorination was developed. The synthesis relied on the use of an oxazole precursor, which was protected with an iodine in the reactive 4-position, followed by complete chlorination of all pyrrole positions. Attempts to prepare phorbazole A and C, which contain a 3,4-dichlorinated pyrrole, were unsuccessful as the desired chlorination pattern on the pyrrole could not be obtained. The identities of the dichlorinated intermediates and products were determined using NMR techniques including NOESY/ROESY, 1,1-ADEQUATE and high-resolution CLIP-HSQMBC.
Collapse
Affiliation(s)
- Yngve Guttormsen
- Department of Chemistry, UiT The Arctic University of Norway, Hansine Hansens veg 54, 9037 Tromsø, Norway; (Y.G.); (J.I.)
| | - Magnus E. Fairhurst
- Department of Chemistry and Centre for Pharmacy, University of Bergen, Allégaten 41, 5007 Bergen, Norway; (M.E.F.); (S.K.P.)
| | - Sunil K. Pandey
- Department of Chemistry and Centre for Pharmacy, University of Bergen, Allégaten 41, 5007 Bergen, Norway; (M.E.F.); (S.K.P.)
| | - Johan Isaksson
- Department of Chemistry, UiT The Arctic University of Norway, Hansine Hansens veg 54, 9037 Tromsø, Norway; (Y.G.); (J.I.)
| | - Bengt Erik Haug
- Department of Chemistry and Centre for Pharmacy, University of Bergen, Allégaten 41, 5007 Bergen, Norway; (M.E.F.); (S.K.P.)
- Correspondence: (B.E.H.); (A.B.); Tel.: +47-55-58-34-68 (B.E.H.); +47-77-64-40-69 (A.B.)
| | - Annette Bayer
- Department of Chemistry, UiT The Arctic University of Norway, Hansine Hansens veg 54, 9037 Tromsø, Norway; (Y.G.); (J.I.)
- Correspondence: (B.E.H.); (A.B.); Tel.: +47-55-58-34-68 (B.E.H.); +47-77-64-40-69 (A.B.)
| |
Collapse
|
14
|
Ndukwe IE, Lam YH, Pandey SK, Haug BE, Bayer A, Sherer EC, Blinov KA, Williamson RT, Isaksson J, Reibarkh M, Liu Y, Martin GE. Unequivocal structure confirmation of a breitfussin analog by anisotropic NMR measurements. Chem Sci 2020; 11:12081-12088. [PMID: 34094423 PMCID: PMC8162999 DOI: 10.1039/d0sc03664a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Structural features of proton-deficient heteroaromatic natural products, such as the breitfussins, can severely complicate their characterization by NMR spectroscopy. For the breitfussins in particular, the constitution of the five-membered oxazole central ring cannot be unequivocally established via conventional NMR methods when the 4′-position is halogenated. The level of difficulty is exacerbated by 4′-iodination, as the accuracy with which theoretical NMR parameters are determined relies extensively on computational treatment of the relativistic effects of the iodine atom. It is demonstrated in the present study, that the structure of a 4′-iodo breitfussin analog can be unequivocally established by anisotropic NMR methods, by adopting a reduced singular value decomposition (SVD) protocol that leverages the planar structures exhibited by its conformers. Structural features of proton-deficient heteroaromatic natural products, such as the breitfussins, can severely complicate their characterization by NMR spectroscopy.![]()
Collapse
Affiliation(s)
- Ikenna E Ndukwe
- Analytical Research & Development, (Rahway), Merck & Co. Inc. Kenilworth NJ USA
| | - Yu-Hong Lam
- Computational and Structural Chemistry, Merck & Co., Inc. Rahway NJ 07065 USA
| | - Sunil K Pandey
- Department of Chemistry and Centre for Pharmacy, University of Bergen Allégaten 41 NO-5020 Bergen Norway
| | - Bengt E Haug
- Department of Chemistry and Centre for Pharmacy, University of Bergen Allégaten 41 NO-5020 Bergen Norway
| | - Annette Bayer
- Department of Chemistry, UiT the Arctic University of Tromsø NO-9037 Tromsø Norway
| | - Edward C Sherer
- Analytical Research & Development, (Rahway), Merck & Co. Inc. Kenilworth NJ USA
| | - Kirill A Blinov
- MestReLab Research S. L. Santiago de Compostela A Coruna 15706 Spain
| | - R Thomas Williamson
- Analytical Research & Development, (Rahway), Merck & Co. Inc. Kenilworth NJ USA
| | - Johan Isaksson
- Department of Chemistry, UiT the Arctic University of Tromsø NO-9037 Tromsø Norway
| | - Mikhail Reibarkh
- Analytical Research & Development, (Rahway), Merck & Co. Inc. Kenilworth NJ USA
| | - Yizhou Liu
- Analytical Research & Development, (Rahway), Merck & Co. Inc. Kenilworth NJ USA
| | - Gary E Martin
- Analytical Research & Development, (Rahway), Merck & Co. Inc. Kenilworth NJ USA
| |
Collapse
|
15
|
Zwick CR, Renata H. Harnessing the biocatalytic potential of iron- and α-ketoglutarate-dependent dioxygenases in natural product total synthesis. Nat Prod Rep 2020; 37:1065-1079. [PMID: 32055818 PMCID: PMC7426249 DOI: 10.1039/c9np00075e] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Covering: up to the end of 2019Iron- and α-ketoglutarate-dependent dioxygenases (Fe/αKGs) represent a versatile and intriguing enzyme family by virtue of their ability to directly functionalize unactivated C-H bonds at the cost of αKG and O2. Fe/αKGs play an important role in the biosynthesis of natural products, valuable biologically active secondary metabolites frequently pursued as drug leads. The field of natural product total synthesis seeks to contruct these molecules as effeciently as possible, although natural products continue to challenge chemists due to their intricate structural complexity. Chemoenzymatic approaches seek to remedy the shortcomings of traditional synthetic methodology by combining Nature's biosynthetic machinery with traditional chemical methods to efficiently construct natural products. Although other oxygenase families have been widely employed for this purpose, Fe/αKGs remain underutilized. The following review will cover recent chemoenzymatic total syntheses involving Fe/αKG enzymes. Additionally, related information involving natural product biosynthesis, methods development, and non-chemoenzymatic total syntheses will be discussed to inform retrosynthetic logic and synthetic design.
Collapse
Affiliation(s)
- Christian R Zwick
- The Scripps Research Institute, 130 Scripps Way, Jupiter, FL 33458, USA.
| | | |
Collapse
|
16
|
McCarthy C, Losada‐Garcia N, Palomo JM. Direct Synthesis of Phenols from Phenylboronic Acids in Aqueous Media Catalyzed by a Cu(0)‐Nanoparticles Biohybrid. ChemistrySelect 2020. [DOI: 10.1002/slct.202002110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Caitlin McCarthy
- Department of Biocatalysis Institute of Catalysis (CSIC) Cantoblanco campus UAM 28049 Madrid Spain) E-mail
| | - Noelia Losada‐Garcia
- Department of Biocatalysis Institute of Catalysis (CSIC) Cantoblanco campus UAM 28049 Madrid Spain) E-mail
| | - Jose M. Palomo
- Department of Biocatalysis Institute of Catalysis (CSIC) Cantoblanco campus UAM 28049 Madrid Spain) E-mail
| |
Collapse
|
17
|
Lv J, Zhao B, Yuan Y, Han Y, Shi Z. Boron-mediated directed aromatic C-H hydroxylation. Nat Commun 2020; 11:1316. [PMID: 32165636 PMCID: PMC7067857 DOI: 10.1038/s41467-020-15207-x] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 02/24/2020] [Indexed: 11/25/2022] Open
Abstract
Transition metal-catalysed C–H hydroxylation is one of the most notable advances in synthetic chemistry during the past few decades and it has been widely employed in the preparation of alcohols and phenols. The site-selective hydroxylation of aromatic C–H bonds under mild conditions, especially in the context of substituted (hetero)arenes with diverse functional groups, remains a challenge. Here, we report a general and mild chelation-assisted C–H hydroxylation of (hetero)arenes mediated by boron species without the use of any transition metals. Diverse (hetero)arenes bearing amide directing groups can be utilized for ortho C–H hydroxylation under mild reaction conditions and with broad functional group compatibility. Additionally, this transition metal-free strategy can be extended to synthesize C7 and C4-hydroxylated indoles. By utilizing the present method, the formal synthesis of several phenol intermediates to bioactive molecules is demonstrated. Transition metal-catalysed C–H hydroxylation is one of the most notable synthetic advances to access alcohols and phenols. Here, the authors report a metal-free, mild C–H hydroxylation of (hetero)arenes via boron-mediated chelation.
Collapse
Affiliation(s)
- Jiahang Lv
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China.,College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, China
| | - Binlin Zhao
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China
| | - Yu Yuan
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, China
| | - Ying Han
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China.
| |
Collapse
|
18
|
Thapaliya ER, Mazza MMA, Cusido J, Baker JD, Raymo FM. A Synthetic Strategy for the Structural Modification of Photoactivatable BODIPY‐Oxazine Dyads. CHEMPHOTOCHEM 2020. [DOI: 10.1002/cptc.201900276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ek Raj Thapaliya
- Laboratory for Molecular Photonics Departments of Biology and Chemistry University of Miami 1301 Memorial Drive Coral Gables FL 33146-0431 USA
| | - Mercedes M. A. Mazza
- Laboratory for Molecular Photonics Departments of Biology and Chemistry University of Miami 1301 Memorial Drive Coral Gables FL 33146-0431 USA
| | - Janet Cusido
- Laboratory for Molecular Photonics Departments of Biology and Chemistry University of Miami 1301 Memorial Drive Coral Gables FL 33146-0431 USA
- Department of Math and Natural Sciences Miami Dade College – Eduardo J. Padron Campus Miami USA
| | - James D. Baker
- Laboratory for Molecular Photonics Departments of Biology and Chemistry University of Miami 1301 Memorial Drive Coral Gables FL 33146-0431 USA
| | - Françisco M. Raymo
- Laboratory for Molecular Photonics Departments of Biology and Chemistry University of Miami 1301 Memorial Drive Coral Gables FL 33146-0431 USA
| |
Collapse
|
19
|
Hansen KØ, Andersen JH, Bayer A, Pandey SK, Lorentzen M, Jørgensen KB, Sydnes MO, Guttormsen Y, Baumann M, Koch U, Klebl B, Eickhoff J, Haug BE, Isaksson J, Hansen EH. Kinase Chemodiversity from the Arctic: The Breitfussins. J Med Chem 2019; 62:10167-10181. [PMID: 31647655 DOI: 10.1021/acs.jmedchem.9b01006] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In this work, we demonstrate that the indole-oxazole-pyrrole framework of the breitfussin family of natural products is a promising scaffold for kinase inhibition. Six new halogenated natural products, breitfussin C-H (3 - 8) were isolated and characterized from the Arctic, marine hydrozoan Thuiaria breitfussi. The structures of two of the new natural products were also confirmed by total synthesis. Two of the breitfussins (3 and 4) were found to selectively inhibit the survival of several cancer cell lines, with the lowest IC50 value of 340 nM measured against the drug-resistant triple negative breast cancer cell line MDA-MB-468, while leaving the majority of the tested cell lines not or significantly less affected. When tested against panels of protein kinases, 3 gave IC50 and Kd values as low as 200 and 390 nM against the PIM1 and DRAK1 kinases, respectively. The activity was confirmed to be mediated through ATP competitive binding in the ATP binding pocket of the kinases. Furthermore, evaluation of potential off-target and toxicological effects, as well as relevant in vitro ADME parameters for 3 revealed that the breitfussin scaffold holds promise for the development of selective kinase inhibitors.
Collapse
Affiliation(s)
- Kine Ø Hansen
- Marbio , UiT - The Arctic University of Norway , Breivika, NO-9037 Tromsø , Norway
| | - Jeanette H Andersen
- Marbio , UiT - The Arctic University of Norway , Breivika, NO-9037 Tromsø , Norway
| | - Annette Bayer
- Department of Chemistry , UiT - The Arctic University of Norway , Breivika, NO-9037 Tromsø , Norway
| | - Sunil K Pandey
- Department of Chemistry and Centre for Pharmacy , University of Bergen , Allégaten 41 , NO-5007 Bergen , Norway
| | - Marianne Lorentzen
- Faculty of Science and Technology, Department of Chemistry, Bioscience and Environmental Engineering , University of Stavanger , NO-4036 Stavanger , Norway
| | - Kåre B Jørgensen
- Faculty of Science and Technology, Department of Chemistry, Bioscience and Environmental Engineering , University of Stavanger , NO-4036 Stavanger , Norway
| | - Magne O Sydnes
- Faculty of Science and Technology, Department of Chemistry, Bioscience and Environmental Engineering , University of Stavanger , NO-4036 Stavanger , Norway
| | - Yngve Guttormsen
- Department of Chemistry , UiT - The Arctic University of Norway , Breivika, NO-9037 Tromsø , Norway
| | - Matthias Baumann
- Lead Discovery Center GmbH , Otto-Hahn-Strasse 15 , 44227 Dortmund , Germany
| | - Uwe Koch
- Lead Discovery Center GmbH , Otto-Hahn-Strasse 15 , 44227 Dortmund , Germany
| | - Bert Klebl
- Lead Discovery Center GmbH , Otto-Hahn-Strasse 15 , 44227 Dortmund , Germany
| | - Jan Eickhoff
- Lead Discovery Center GmbH , Otto-Hahn-Strasse 15 , 44227 Dortmund , Germany
| | - Bengt Erik Haug
- Department of Chemistry and Centre for Pharmacy , University of Bergen , Allégaten 41 , NO-5007 Bergen , Norway
| | - Johan Isaksson
- Department of Chemistry , UiT - The Arctic University of Norway , Breivika, NO-9037 Tromsø , Norway
| | - Espen H Hansen
- Marbio , UiT - The Arctic University of Norway , Breivika, NO-9037 Tromsø , Norway
| |
Collapse
|
20
|
Yang L, Shi L, Xing Q, Huang KW, Xia C, Li F. Enabling CO Insertion into o-Nitrostyrenes beyond Reduction for Selective Access to Indolin-2-one and Dihydroquinolin-2-one Derivatives. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02863] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Li Yang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Lijun Shi
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Qi Xing
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Kuo-Wei Huang
- KAUST Catalysis Center and Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Chungu Xia
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Fuwei Li
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| |
Collapse
|
21
|
Miley GP, Rote JC, Silverman RB, Kelleher NL, Thomson RJ. Total Synthesis of Tambromycin Enabled by Indole C-H Functionalization. Org Lett 2018; 20:2369-2373. [PMID: 29584440 DOI: 10.1021/acs.orglett.8b00700] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The total synthesis of tambromycin (1), a recently isolated tetrapeptide, is reported. This unusual natural product possesses a highly modified tryptophan-derived indole fragment fused to an α-methylserine-derived oxazoline ring, and a unique noncanonical amino acid residue named tambroline (11). A convergent synthesis of tambromycin was achieved by a 13-step route that leveraged recent developments in the field of C-H functionalization to prepare the complex indole fragment, as well as an efficient synthesis of tambroline that featured a diastereoselective amination of homoproline.
Collapse
|
22
|
Zhang X, King-Smith E, Renata H. Total Synthesis of Tambromycin by Combining Chemocatalytic and Biocatalytic C−H Functionalization. Angew Chem Int Ed Engl 2018; 57:5037-5041. [DOI: 10.1002/anie.201801165] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Xiao Zhang
- Department of Chemistry; The Scripps Research Institute; 130 Scripps Way Jupiter FL 33458 USA
| | - Emma King-Smith
- Department of Chemistry; The Scripps Research Institute; 130 Scripps Way Jupiter FL 33458 USA
| | - Hans Renata
- Department of Chemistry; The Scripps Research Institute; 130 Scripps Way Jupiter FL 33458 USA
| |
Collapse
|
23
|
Zhang X, King-Smith E, Renata H. Total Synthesis of Tambromycin by Combining Chemocatalytic and Biocatalytic C−H Functionalization. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801165] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xiao Zhang
- Department of Chemistry; The Scripps Research Institute; 130 Scripps Way Jupiter FL 33458 USA
| | - Emma King-Smith
- Department of Chemistry; The Scripps Research Institute; 130 Scripps Way Jupiter FL 33458 USA
| | - Hans Renata
- Department of Chemistry; The Scripps Research Institute; 130 Scripps Way Jupiter FL 33458 USA
| |
Collapse
|
24
|
Nabi AA, Liyu J, Lindsay AC, Sperry J. C4−H alkoxylation of 6-bromoindole and its application to the synthesis of breitfussin B. Tetrahedron 2018. [DOI: 10.1016/j.tet.2017.10.067] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
25
|
Abstract
Covering: 2015. Previous review: Nat. Prod. Rep., 2016, 33, 382-431This review covers the literature published in 2015 for marine natural products (MNPs), with 1220 citations (792 for the period January to December 2015) 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 (1340 in 429 papers for 2015), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.
Collapse
Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - Murray H G Munro
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
| | - Michèle R Prinsep
- Chemistry, School of Science, University of Waikato, Hamilton, New Zealand
| |
Collapse
|
26
|
Abstract
Covering: July 2012 to June 2015. Previous review: Nat. Prod. Rep., 2013, 30, 869-915The structurally diverse imidazole-, oxazole-, and thiazole-containing secondary metabolites are widely distributed in terrestrial and marine environments, and exhibit extensive pharmacological activities. In this review the latest progress involving the isolation, biological activities, and chemical and biogenetic synthesis studies on these natural products has been summarized.
Collapse
Affiliation(s)
- Zhong Jin
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China. and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
| |
Collapse
|
27
|
Secondary Metabolites from Polar Organisms. Mar Drugs 2017; 15:md15030028. [PMID: 28241505 PMCID: PMC5367009 DOI: 10.3390/md15030028] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2017] [Revised: 01/24/2017] [Accepted: 01/29/2017] [Indexed: 01/11/2023] Open
Abstract
Polar organisms have been found to develop unique defences against the extreme environment environment, leading to the biosynthesis of novel molecules with diverse bioactivities. This review covers the 219 novel natural products described since 2001, from the Arctic and the Antarctic microoganisms, lichen, moss and marine faunas. The structures of the new compounds and details of the source organism, along with any relevant biological activities are presented. Where reported, synthetic and biosynthetic studies on the polar metabolites have also been included.
Collapse
|
28
|
Affiliation(s)
- Akbar H. Khan
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Jason S. Chen
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| |
Collapse
|