1
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Ba M, He F, Ren L, Whittingham WG, Yang P, Li A. Scalable Total Synthesis of Acremolactone B. Angew Chem Int Ed Engl 2024; 63:e202314800. [PMID: 37932901 DOI: 10.1002/anie.202314800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 10/27/2023] [Accepted: 10/31/2023] [Indexed: 11/08/2023]
Abstract
Acremolactone B is a pyridine-containing azaphilone-type polyketide. The first total synthesis of this molecule was achieved on a gram scale, based on an aza-6π electrocyclization-aromatization strategy for construction of the tetra-substituted pyridine ring. A bicyclic intermediate was expeditiously prepared by using [2+2] photocycloaddition and chemoselective Baeyer-Villiger oxidation, which was further elaborated to a densely substituted aza-triene. An electrocyclization-aromatization cascade was utilized to forge the tetracyclic core of this natural product, and the side chain was introduced through diastereoselective acylation and reduction.
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Affiliation(s)
- Mengyu Ba
- College of Chemistry and Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Fengqi He
- College of Chemistry and Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Lu Ren
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
| | - William G Whittingham
- Jealott's Hill International Research Centre, Syngenta Limited, Bracknell, Berkshire, RG42 6EY, UK
| | - Peng Yang
- College of Chemistry and Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450001, China
| | - Ang Li
- College of Chemistry and Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
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2
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Hou J, Li X, Yan K, Zhang L, Loh TP, Xie P. Uracil-Cu(i) catalyst: allylation of cyclopropanols with Morita-Baylis-Hillman alcohols under water-tolerant conditions. Chem Sci 2024; 15:1143-1149. [PMID: 38239700 PMCID: PMC10793597 DOI: 10.1039/d3sc04890j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 12/07/2023] [Indexed: 01/22/2024] Open
Abstract
Inspired by the high affinity of copper with DNA and RNA, a uracil-copper catalytic system was developed to promote ring-opening allylation of cyclopropanols with allylic alcohols under water-tolerant conditions. A new C-OH bond-breaking model can well resolve the trade-off between the need for acidic activators for C(allyl)-OH bond cleavage and the demand for strong basic conditions for generating homoenolates. Therefore, Morita-Baylis-Hillman alcohols, rather than their pre-activated versions, could be incorporated directly into dehydrative cross-coupling with cyclopropanols delivering water as the only by-product. A variety of functionalized δ,ε-unsaturated ketones were obtained in good-to-high yield with high E-selectivity.
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Affiliation(s)
- Jingwei Hou
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Xiaohong Li
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Kaiyu Yan
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Lei Zhang
- School of Science, Tianjin Chengjian University Tianjin 300384 China
| | - Teck-Peng Loh
- College of Advanced Interdisciplinary Science and Technology, Henan University of Technology Zhengzhou 450001 China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore 637371
| | - Peizhong Xie
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
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3
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Saigitbatalova ES, Latypova LZ, Zagidullin AA, Kurbangalieva AR, Gridnev ID. The Reduction of Carbonyl Compounds with Dicyclopentylzinc: A New Example of Asymmetric Amplifying Autocatalysis. Int J Mol Sci 2023; 24:17048. [PMID: 38069371 PMCID: PMC10707151 DOI: 10.3390/ijms242317048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 11/25/2023] [Accepted: 11/29/2023] [Indexed: 12/18/2023] Open
Abstract
A previously unknown reduction of carbonyl compounds with dicyclopentylzinc is reported. Aldehydes react in mild conditions yielding corresponding primary alcohols and cyclopentene. Although cyclohexanone and acetophenone are inert to dicyclopentylzinc, a variety of heterocyclic ketones reacted readily, yielding reasonable to high yields of corresponding secondary alcohols. When the reaction was catalyzed with (-)-(1R,2S)-ephedrine, 3-acetylpyridine (10) resulted in a high yield of (S)-1-(pyridin-3-yl)ethanol (19) with >99% ee. 5-Acetyl-2-bromopyridine (11) also provided the corresponding optically active alcohol 20, albeit with a much lower optical yield. When 10% of 19 with 92% ee was used as an autocatalyst, 55% yield of the same compound was obtained, with 95% ee and 96% ee in two independent experiments. A three-stage reaction sequence starting from "no chirality" reaction yielded 19 with 6% ee. Thus, amplifying autocatalysis was detected in the reaction of ketone 10 with dicylopentylzinc.
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Affiliation(s)
- Elena Sh. Saigitbatalova
- Biofunctional Chemistry Laboratory, A. Butlerov Institute of Chemistry, Kazan Federal University, 18 Kremlyovskaya Street, 420008 Kazan, Russia
| | - Liliya Z. Latypova
- Biofunctional Chemistry Laboratory, A. Butlerov Institute of Chemistry, Kazan Federal University, 18 Kremlyovskaya Street, 420008 Kazan, Russia
| | - Almaz A. Zagidullin
- A. E. Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov Street, 420088 Kazan, Russia
| | - Almira R. Kurbangalieva
- Biofunctional Chemistry Laboratory, A. Butlerov Institute of Chemistry, Kazan Federal University, 18 Kremlyovskaya Street, 420008 Kazan, Russia
| | - Ilya D. Gridnev
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky Prosp. 47, 119991 Moscow, Russia
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4
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Munir R, Zahoor AF, Javed S, Parveen B, Mansha A, Irfan A, Khan SG, Irfan A, Kotwica-Mojzych K, Mojzych M. Simmons-Smith Cyclopropanation: A Multifaceted Synthetic Protocol toward the Synthesis of Natural Products and Drugs: A Review. Molecules 2023; 28:5651. [PMID: 37570621 PMCID: PMC10420228 DOI: 10.3390/molecules28155651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/16/2023] [Accepted: 07/20/2023] [Indexed: 08/13/2023] Open
Abstract
Simmons-Smith cyclopropanation is a widely used reaction in organic synthesis for stereospecific conversion of alkenes into cyclopropane. The utility of this reaction can be realized by the fact that the cyclopropane motif is a privileged synthetic intermediate and a core structural unit of many biologically active natural compounds such as terpenoids, alkaloids, nucleosides, amino acids, fatty acids, polyketides and drugs. The modified form of Simmons-Smith cyclopropanation involves the employment of Et2Zn and CH2I2 (Furukawa reagent) toward the total synthesis of a variety of structurally complex natural products that possess broad range of biological activities including anticancer, antimicrobial and antiviral activities. This review aims to provide an intriguing glimpse of the Furukawa-modified Simmons-Smith cyclopropanation, within the year range of 2005 to 2022.
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Affiliation(s)
- Ramsha Munir
- Medicinal Chemistry Research Lab, Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan; (R.M.); (B.P.); (A.M.); (S.G.K.); (A.I.)
| | - Ameer Fawad Zahoor
- Medicinal Chemistry Research Lab, Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan; (R.M.); (B.P.); (A.M.); (S.G.K.); (A.I.)
| | - Sadia Javed
- Department of Biochemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan;
| | - Bushra Parveen
- Medicinal Chemistry Research Lab, Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan; (R.M.); (B.P.); (A.M.); (S.G.K.); (A.I.)
| | - Asim Mansha
- Medicinal Chemistry Research Lab, Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan; (R.M.); (B.P.); (A.M.); (S.G.K.); (A.I.)
| | - Ahmad Irfan
- Department of Chemistry, College of Science, King Khalid University, Abha 61413, Saudi Arabia;
| | - Samreen Gul Khan
- Medicinal Chemistry Research Lab, Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan; (R.M.); (B.P.); (A.M.); (S.G.K.); (A.I.)
| | - Ali Irfan
- Medicinal Chemistry Research Lab, Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan; (R.M.); (B.P.); (A.M.); (S.G.K.); (A.I.)
| | - 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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5
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Wu J, Li SJ, Jiang L, Ma XC, Lan Y, Shen L. UV light-driven late-stage skeletal reorganization to diverse limonoid frameworks: A proof of concept for photobiosynthesis. SCIENCE ADVANCES 2023; 9:eade2981. [PMID: 36706176 PMCID: PMC9882982 DOI: 10.1126/sciadv.ade2981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 12/29/2022] [Indexed: 06/18/2023]
Abstract
Late-stage skeletal reorganization (LSSR) is a type of fascinating organic transformation processes in natural product total synthesis. However, few facile and effective LSSR methodologies have hitherto been developed. Here, LSSR of limonoid natural products via photochemical cascades is first reported. Starting from xyloelves A and B, nine distinct limonoid products with five unprecedented scaffolds are generated. The photocascade pathways of these natural products and mechanistic rationale via intramolecular triplet energy transfer are revealed by quantum mechanical calculations. Most notably, ultraviolet light-driven transannular and stereoselective C → C 1,4-acyl migration is first found as a photochemical approach, particularly for LSSR of natural products. This approach holds promise for designing LSSR strategies to access bioactive cage-like molecules. Besides that, our findings provide a clear proof of concept for natural product photobiosynthesis. Xyloelf A, substantially ameliorating concanavalin A-induced liver injury in mice, could be used as a unique molecular template for hepatoprotective drug discovery.
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Affiliation(s)
- Jun Wu
- Guangdong Key Laboratory of Natural Medicine Research and Development, College of Pharmacy, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan 523808, China
| | - Shi-Jun Li
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Long Jiang
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
| | - Xiao-Chi Ma
- Pharmaceutical Research Center, Second Affiliated Hospital, Dalian Medical University, Dalian 116044, China
| | - Yu Lan
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, China
| | - Li Shen
- Guangdong Key Laboratory of Natural Medicine Research and Development, College of Pharmacy, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan 523808, China
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6
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Schuppe AW, Liu Y, Gonzalez-Hurtado E, Zhao Y, Jiang X, Ibarraran S, Huang D, Wang E, Lee J, Loria JP, Dixit VD, Li X, Newhouse TR. Unified Total Synthesis of the Limonoid Alkaloids: Strategies for the De Novo Synthesis of Highly Substituted Pyridine Scaffolds. Chem 2022; 8:2856-2887. [PMID: 37396824 PMCID: PMC10311986 DOI: 10.1016/j.chempr.2022.09.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Highly substituted pyridine scaffolds are found in many biologically active natural products and therapeutics. Accordingly, numerous complementary de novo approaches to obtain differentially substituted pyridines have been disclosed. This article delineates the evolution of the synthetic strategies designed to assemble the demanding tetrasubstituted pyridine core present in the limonoid alkaloids isolated from Xylocarpus granatum, including xylogranatopyridine B, granatumine A and related congeners. In addition, NMR calculations suggested structural misassignment of several limonoid alkaloids, and predicted their C3-epimers as the correct structures, which was further validated unequivocally through chemical synthesis. The materials produced in this study were evaluated for cytotoxicity, anti-oxidant effects, anti-inflammatory action, PTP1B and Nlrp3 inflammasome inhibition, which led to compelling anti-inflammatory activity and anti-oxidant effects being discovered.
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Affiliation(s)
- Alexander W. Schuppe
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Yannan Liu
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Elsie Gonzalez-Hurtado
- Department of Pathology, Immunobiology, Comparative Medicine, Yale School of Medicine, 310 Cedar Street, New Haven, Connecticut 06520, United States
| | - Yizhou Zhao
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Xuefeng Jiang
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310018, P. R. China
| | - Sebastian Ibarraran
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - David Huang
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Emma Wang
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Jaehoo Lee
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - J. Patrick Loria
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Vishwa Deep Dixit
- Department of Pathology, Immunobiology, Comparative Medicine, Yale School of Medicine, 310 Cedar Street, New Haven, Connecticut 06520, United States
| | - Xin Li
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310018, P. R. China
| | - Timothy R. Newhouse
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
- Lead contact
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7
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Abstract
The limonoids have attracted significant attention from the synthetic community owing to their striking structural complexity and medicinal potential. Recent efforts notwithstanding, synthetic access to many intact or ring D-seco limonoids still remains elusive. Here, we report the first de novo synthesis of gedunin, a ring D-seco limonoid with HSP90 inhibitory activity, that proceeds in 13 steps. Two enabling features in our strategy are the application of modern catalytic transformations to set the key quaternary centers in the carbocyclic core and the use of biocatalytic oxidation at C3 to establish a chemical handle to access the A-ring enone motif. The strategy presented herein may provide an entry point to a wider range of oxidized limonoids.
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Affiliation(s)
- Jian Li
- Department of Chemistry, BioScience Research Collaborative, Rice University, Houston, Texas 77005, United States
| | - Fang Chen
- Department of Chemistry, BioScience Research Collaborative, Rice University, Houston, Texas 77005, United States
| | - Hans Renata
- Department of Chemistry, BioScience Research Collaborative, Rice University, Houston, Texas 77005, United States
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8
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Luo J, Sun Y, Li Q, Kong L. Research progress of meliaceous limonoids from 2011 to 2021. Nat Prod Rep 2022; 39:1325-1365. [PMID: 35608367 DOI: 10.1039/d2np00015f] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Covering: July 2010 to December 2021Limonoids, a kind of natural tetranortriterpenoids with diverse skeletons and valuable insecticidal and medicinal bioactivities, are the characteristic metabolites of most plants of the Meliaceae family. The chemistry and bioactivities of meliaceous limonoids are a continuing hot area of natural products research; to date, about 2700 meliaceous limonoids have been identified. In particular, more than 1600, including thirty kinds of novel rearranged skeletons, have been isolated and identified in the past decade due to their wide distribution and abundant content in Meliaceae plants and active biosynthetic pathways. In addition to the discovery of new structures, many positive medicinal bioactivities of meliaceous limonoids have been investigated, and extensive achievements regarding the chemical and biological synthesis have been made. This review summarizes the recent research progress in the discovery of new structures, medicinal and agricultural bioactivities, and chem/biosynthesis of limonoids from the plants of the Meliaceae family during the past decade, with an emphasis on the discovery of limonoids with novel skeletons, the medicinal bioactivities and mechanisms, and chemical synthesis. The structures, origins, and bioactivities of other new limonoids were provided as ESI. Studies published from July 2010 to December 2021 are reviewed, and 482 references are cited.
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Affiliation(s)
- Jun Luo
- Jiangsu Key Laboratory of Bioactive Natural Product Research, State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China.
| | - Yunpeng Sun
- Jiangsu Key Laboratory of Bioactive Natural Product Research, State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China.
| | - Qiurong Li
- Jiangsu Key Laboratory of Bioactive Natural Product Research, State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China.
| | - Lingyi Kong
- Jiangsu Key Laboratory of Bioactive Natural Product Research, State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China.
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9
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Kang G, Han S. Synthesis of Dimeric Securinega Alkaloid Flueggeacosine B: From Pd-Catalyzed Cross-Coupling to Cu-Catalyzed Cross-Dehydrogenative Coupling. J Am Chem Soc 2022; 144:8932-8937. [PMID: 35576619 DOI: 10.1021/jacs.2c03861] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
We completed the synthesis of dimeric high-oxidation-state securinega alkaloid flueggeacosine B via two synthetic routes from allosecurinine. The first-generation synthesis (seven overall steps) involved a Liebeskind-Srogl cross-coupling reaction for the union of two functionalized fragments, the organostannane and the thioester. As a means to further streamline the synthetic route, we have developed a visible-light-mediated Cu-catalyzed cross-dehydrogenative coupling (CDC) reaction between an aldehyde and an electron-deficient olefin. This enabled the second-generation synthesis of flueggeacosine B from allosecurinine in four overall steps. The newly developed CDC reaction paves a direct way to a conjugated dicarbonyl moiety, a ubiquitous structural moiety present in various natural products.
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Affiliation(s)
- Gyumin Kang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Sunkyu Han
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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10
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Molecular docking study of xylogranatins binding to glycogen synthase kinase-3β. DIGITAL CHINESE MEDICINE 2022. [DOI: 10.1016/j.dcmed.2022.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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11
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Liu Y, Schuppe AW, Zhao Y, Lee J, Newhouse TR. Synthesis of (-)-melazolide B, a degraded limonoid, from a natural terpene precursor. TETRAHEDRON CHEM 2022; 1:100011. [PMID: 38606284 PMCID: PMC11008529 DOI: 10.1016/j.tchem.2022.100011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
Degraded limonoids are a subclass of limonoid natural products that derive from ring-intact or ring-rearranged limonoids. Establishment of robust synthetic routes to access them could provide valuable materials to identify the simplest active pharmacophore responsible for the observed biological activities of the parent molecules. This communication delineates the development of a divergent strategy to furnish melazolide B and several other related congeners from a common keto-lactone intermediate, which was rapidly assembled from α-ionone. A chemoselective carbonyl α,β-dehydrogenation and a Wharton reduction were key strategic steps in this synthetic pathway.
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Affiliation(s)
| | | | - Yizhou Zhao
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, CT, 06520-8107, United States
| | - Jaehoo Lee
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, CT, 06520-8107, United States
| | - Timothy R. Newhouse
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, CT, 06520-8107, United States
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12
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Haut FL, Feichtinger NJ, Plangger I, Wein LA, Müller M, Streit TN, Wurst K, Podewitz M, Magauer T. Synthesis of Pyrroles via Consecutive 6π-Electrocyclization/Ring-Contraction of Sulfilimines. J Am Chem Soc 2021; 143:9002-9008. [PMID: 34106724 PMCID: PMC8227482 DOI: 10.1021/jacs.1c04835] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Indexed: 12/20/2022]
Abstract
We present a modular, synthetic entry to polysubstituted pyrroles employing readily available 2,5-dihydrothiophenes. Ring-opening of the heterocycle provides access to a panel of 1,3-dienes which undergo pyrrole formation in the presence of inexpensive chloramine-T trihydrate. The transformation is conducted in an open flask and proceeds at ambient temperatures (23 °C) in nondry solvents. A careful adjustment of the electronics and sterics of the 1,3-diene precursor allows for the isolation of key intermediates. DFT studies identified a reaction mechanism that features a 6π-electrocyclization of a sulfilimine intermediate followed by spontaneous ring-contraction to reveal the pyrrole skeleton.
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Affiliation(s)
- Franz-Lucas Haut
- Institute
of Organic Chemistry and Center for Molecular Biosciences, Leopold-Franzens-University Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Niklas J. Feichtinger
- Institute
of Organic Chemistry and Center for Molecular Biosciences, Leopold-Franzens-University Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Immanuel Plangger
- Institute
of Organic Chemistry and Center for Molecular Biosciences, Leopold-Franzens-University Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Lukas A. Wein
- Institute
of Organic Chemistry and Center for Molecular Biosciences, Leopold-Franzens-University Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Mira Müller
- Institute
of Organic Chemistry and Center for Molecular Biosciences, Leopold-Franzens-University Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Tim-Niclas Streit
- Institute
of Organic Chemistry and Center for Molecular Biosciences, Leopold-Franzens-University Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Klaus Wurst
- Institute
of General, Inorganic and Theoretical Chemistry and Center for Molecular
Biosciences, Leopold-Franzens-University
Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Maren Podewitz
- Institute
of General, Inorganic and Theoretical Chemistry and Center for Molecular
Biosciences, Leopold-Franzens-University
Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Thomas Magauer
- Institute
of Organic Chemistry and Center for Molecular Biosciences, Leopold-Franzens-University Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
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13
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Clementson S, Matheu SA, Rørsted EM, Pedersen H, Jensen AA, Clausen RP, Vital P, Glibstrup E, Jessing M, Kristensen JL. Erythrina Alkaloid Analogues as nAChR Antagonists-A Flexible Platform for Leads in Drug Discovery. J Org Chem 2021; 86:8248-8262. [PMID: 34061521 DOI: 10.1021/acs.joc.1c00707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Erythrina alkaloids and their central nervous system effects have been studied for over a century, mainly due to their potent antagonistic actions at β2-containing nicotinic acetylcholine receptors (nAChRs). In the present work, we report a synthetic approach giving access to a diverse set of Erythrina natural product analogues and present the enantioselective total synthesis of (+)-Cocculine and (+)-Cocculidine, both found to be potent antagonists of the β2-containing nAChRs.
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Affiliation(s)
- Sebastian Clementson
- Molecular Discovery and Innovation, H. Lundbeck A/S, Ottiliavej 9, Valby 2500, Denmark.,Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen 2100, Denmark
| | - Sergio Armentia Matheu
- Molecular Discovery and Innovation, H. Lundbeck A/S, Ottiliavej 9, Valby 2500, Denmark.,Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen 2100, Denmark
| | - Emil Märcher Rørsted
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen 2100, Denmark
| | - Henrik Pedersen
- Molecular Discovery and Innovation, H. Lundbeck A/S, Ottiliavej 9, Valby 2500, Denmark
| | - Anders A Jensen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen 2100, Denmark
| | - Rasmus P Clausen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen 2100, Denmark
| | - Paulo Vital
- Molecular Discovery and Innovation, H. Lundbeck A/S, Ottiliavej 9, Valby 2500, Denmark
| | - Emil Glibstrup
- Molecular Discovery and Innovation, H. Lundbeck A/S, Ottiliavej 9, Valby 2500, Denmark
| | - Mikkel Jessing
- Molecular Discovery and Innovation, H. Lundbeck A/S, Ottiliavej 9, Valby 2500, Denmark
| | - Jesper L Kristensen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen 2100, Denmark
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14
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Chen M, Dong G. Platinum-Catalyzed α,β-Desaturation of Cyclic Ketones through Direct Metal-Enolate Formation. Angew Chem Int Ed Engl 2021; 60:7956-7961. [PMID: 33460511 DOI: 10.1002/anie.202013628] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 12/11/2020] [Indexed: 12/14/2022]
Abstract
The development of a platinum-catalyzed desaturation of cyclic ketones to their conjugated α,β-unsaturated counterparts is reported in this full article. A unique diene-platinum complex was identified to be an efficient catalyst, which enables direct metal-enolate formation. The reaction operates under mild conditions without using strong bases or acids. Good to excellent yields can be achieved for diverse and complex scaffolds. A wide range of functional groups, including those sensitive to acids, bases/nucleophiles, or palladium species, are tolerated, which represents a distinct feature from other known desaturation methods. Mechanistically, this platinum catalysis exhibits a fast and reversible α-deprotonation followed by a rate-determining β-hydrogen elimination process, which is different from the prior Pd-catalyzed desaturation method. Promising preliminary enantioselective desaturation using a chiral-diene-platinum complex has also been obtained.
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Affiliation(s)
- Ming Chen
- Department of Chemistry, University of Chicago, Chicago, IL, 60637, USA
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, Chicago, IL, 60637, USA
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15
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Chen M, Dong G. Platinum‐Catalyzed α,β‐Desaturation of Cyclic Ketones through Direct Metal–Enolate Formation. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202013628] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ming Chen
- Department of Chemistry University of Chicago Chicago IL 60637 USA
| | - Guangbin Dong
- Department of Chemistry University of Chicago Chicago IL 60637 USA
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16
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Abstract
The development of novel synthetic methods remains a cornerstone in simplifying complex molecule synthesis. Progress in the field of transition metal catalysis has enabled new mechanistic strategies to achieve difficult chemical transformations, increased the value of abundant chemical building blocks, and pushed the boundaries of creative and strategic route design to improve step economy in multistep synthesis. Methodologies to introduce an olefin into saturated molecules continue to be essential transformations because of the plethora of reactions available for alkene functionalization. Of particular importance are dehydrogenation reactions adjacent to electron-withdrawing groups such as carbonyls, which advantageously provide activated olefins that can be regioselectively manipulated. Palladium catalysis occupies a central role in the most widely adopted carbonyl dehydrogenation reactions, but limits to the scope of these protocols persist.In this Account, we describe our group's contributions to the area of transition-metal-catalyzed dehydrogenation using palladium catalysis and more sustainable and economical nickel catalysis. These metals are used in conjunction with allyl and aryl halides or pseudohalides that serve as oxidants to access a unique mechanistic approach for one-step α,β-dehydrogenation of various electron-withdrawing groups, including ketones, esters, nitriles, amides, carboxylic acids, and electron-deficient heteroarenes. The pivotal reaction parameters that can be modified to influence reaction efficiency are highlighted, including base and oxidant structure as well as ligand and salt additive effects. This discussion is expected to serve as a guide for troubleshooting challenging dehydrogenation reactions and provide insight for future reaction development in this area.In addition to enabling dehydrogenation reactions, our group's allyl-Pd and -Ni chemistry can be used for C-C and C-X bond-forming reactions, providing novel disconnections with practical applications for expediting multistep synthesis. These transformations include a telescoped process for ketone α,β-vicinal difunctionalization; an oxidative enone β-functionalization, including β-stannylation, β-silylation, and β-alkylation; and an oxidative cycloalkenylation between unstabilized ketone enolates and unactivated alkenes. These bond-forming methodologies broaden the range of transformations accessible from abundant ketone, enone, and alkene moieties. Both the dehydrogenation and C-C and C-X bond-forming methodologies have been implemented in our group's total synthesis campaigns to provide step-efficient synthetic routes toward diverse natural products.Through the lens of multistep synthesis, the utility and robustness of our dehydrogenation and dehydrogenative functionalization methodologies can be better appreciated, and we hope that this Account will inspire practitioners to apply our methodologies to their own synthetic challenges.
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Affiliation(s)
- David Huang
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Timothy R Newhouse
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
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17
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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.
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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
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18
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Abstract
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An enantioselective total synthesis of plagiochianin B is described that employs
(+)-3-carene as its point of departure and delivers the enantiomer of the natural
product. Key features of the synthesis include a palladium-mediated regioselective
oxidative cleavage of an olefin residing on a pyridine derived from a 6π-azatriene
electrocyclization.
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Affiliation(s)
- Richard K Jackson
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - John L Wood
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
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19
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Sekiguchi Y, Yoshikai N. Metal-Catalyzed Transformations of Cyclopropanols via Homoenolates. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200270] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yoshiya Sekiguchi
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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20
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Gnaim S, Vantourout JC, Serpier F, Echeverria PG, Baran PS. Carbonyl Desaturation: Where Does Catalysis Stand? ACS Catal 2021. [DOI: 10.1021/acscatal.0c04712] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Samer Gnaim
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Julien C. Vantourout
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Fabien Serpier
- Minakem High Potent, 8 Rue Fond Jean Pâques, 1435 Mont-Saint-Guibert, Belgium
| | | | - Phil. S. Baran
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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21
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Fernandes RA, Kumar P, Choudhary P. Evolution of Strategies in Protecting‐Group‐Free Synthesis of Natural Products: A Recent Update. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001246] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Rodney A. Fernandes
- Department of Chemistry Indian Institute of Technology Bombay 400076 Mumbai, Powai Maharashtra India
| | - Praveen Kumar
- Department of Chemistry Indian Institute of Technology Bombay 400076 Mumbai, Powai Maharashtra India
| | - Priyanka Choudhary
- Department of Chemistry Indian Institute of Technology Bombay 400076 Mumbai, Powai Maharashtra India
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22
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McDonald TR, Mills LR, West MS, Rousseaux SAL. Selective Carbon–Carbon Bond Cleavage of Cyclopropanols. Chem Rev 2020; 121:3-79. [DOI: 10.1021/acs.chemrev.0c00346] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Tyler R. McDonald
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - L. Reginald Mills
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - Michael S. West
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - Sophie A. L. Rousseaux
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
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23
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Jeon S, Lee J, Park S, Han S. Total synthesis of dimeric Securinega alkaloids (-)-flueggenines D and I. Chem Sci 2020; 11:10934-10938. [PMID: 34123190 PMCID: PMC8162258 DOI: 10.1039/d0sc03057k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 09/06/2020] [Indexed: 11/21/2022] Open
Abstract
We describe the total synthesis of (-)-flueggenines D and I. This features the first total synthesis of dimeric Securinega alkaloids with a C(α)-C(δ') connectivity between two monomeric units. The key dimerization was enabled by a sequence that involves Stille reaction and conjugate reduction. The high chemofidelity of the Stille reaction enabled us to assemble two structurally complex fragments that could not be connected by other methods. Stereochemical flexibility and controllability at the δ'-junction of the dimeric intermediate render our synthetic strategy broadly applicable to the synthesis of other high-order Securinega alkaloids.
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Affiliation(s)
- Sangbin Jeon
- Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST) Daejeon 34141 South Korea
| | - Jinwoo Lee
- Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST) Daejeon 34141 South Korea
| | - Sangbin Park
- Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST) Daejeon 34141 South Korea
| | - Sunkyu Han
- Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST) Daejeon 34141 South Korea
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24
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Kanda Y, Ishihara Y, Wilde NC, Baran PS. Two-Phase Total Synthesis of Taxanes: Tactics and Strategies. J Org Chem 2020; 85:10293-10320. [DOI: 10.1021/acs.joc.0c01287] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yuzuru Kanda
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Yoshihiro Ishihara
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Nathan C. Wilde
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Phil S. Baran
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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25
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Chen H, Liu L, Huang T, Chen J, Chen T. Direct Dehydrogenation for the Synthesis of α,β‐Unsaturated Carbonyl Compounds. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000454] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Hong Chen
- Haikou Hospital affiliated to Xiangya School of MedicineCentral South University Haikou 570100 People's Republic of China
| | - Long Liu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island ResourcesHainan Provincial Key Lab of Fine ChemHainan University Haikou 570228 People's Republic of China
| | - Tianzeng Huang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island ResourcesHainan Provincial Key Lab of Fine ChemHainan University Haikou 570228 People's Republic of China
| | - Jing Chen
- Haikou Hospital affiliated to Xiangya School of MedicineCentral South University Haikou 570100 People's Republic of China
| | - Tieqiao Chen
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island ResourcesHainan Provincial Key Lab of Fine ChemHainan University Haikou 570228 People's Republic of China
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26
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Yang BJ, Fan SR, Cai JY, Wang YT, Jing CX, Guo JJ, Chen DZ, Hao XJ. Aphananoid A is an Anti-Inflammatory Limonoid with a New 5/6/5 Fused Ring Featuring a C24 Carbon Skeleton from Aphanamixis polystachya. J Org Chem 2020; 85:8597-8602. [PMID: 32512996 DOI: 10.1021/acs.joc.0c00922] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bi-Juan Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shi-Rui Fan
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jie-Yun Cai
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Yi-Ting Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Chen-xu Jing
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Jing-Jing Guo
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Duo-Zhi Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Xiao-Jiang Hao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
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27
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Heravi MM, Janati F, Zadsirjan V. Applications of Knoevenagel condensation reaction in the total synthesis of natural products. MONATSHEFTE FUR CHEMIE 2020. [DOI: 10.1007/s00706-020-02586-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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28
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Bao J, Tian H, Yang P, Deng J, Gui J. Modular Synthesis of Functionalized Butenolides by Oxidative Furan Fragmentation. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901613] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Jiajing Bao
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Hailong Tian
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Peicheng Yang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Jiachen Deng
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Jinghan Gui
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
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29
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Cao Y, Liu L, Huang T, Chen T. Iodine-catalyzed α,β-dehydrogenation of ketones and aldehydes generating conjugated enones and enals. NEW J CHEM 2020. [DOI: 10.1039/d0nj01244k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A transition metal-free α,β-dehydrogenation of ketones and aldehydes was developed.
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Affiliation(s)
- Yuanjie Cao
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- China
| | - Long Liu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources
- College of Chemical Engineering and Technology
- Hainan University
- Haikou
- China
| | - Tianzeng Huang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources
- College of Chemical Engineering and Technology
- Hainan University
- Haikou
- China
| | - Tieqiao Chen
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- China
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30
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Fu S, Liu B. Recent progress in the synthesis of limonoids and limonoid-like natural products. Org Chem Front 2020. [DOI: 10.1039/d0qo00203h] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Recent progress in syntheses of limonoids and limonoid-like natural products is reviewed. The current “state-of-art” advance on novel synthetic strategy are summarized and future outlook will be presented.
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Affiliation(s)
- Shaomin Fu
- Key Laboratory of Green Chemistry &Technology of the Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | - Bo Liu
- Key Laboratory of Green Chemistry &Technology of the Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu
- China
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31
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Molloy JJ, Morack T, Gilmour R. Positional and Geometrical Isomerisation of Alkenes: The Pinnacle of Atom Economy. Angew Chem Int Ed Engl 2019; 58:13654-13664. [PMID: 31233259 DOI: 10.1002/anie.201906124] [Citation(s) in RCA: 152] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Indexed: 12/13/2022]
Abstract
Strategies to achieve spatiotemporal regulation of pre-existing alkenes via external stimuli are essential given the ubiquity of feedstock olefins in chemistry and their downstream applications. Mirroring the 1-0 switch that underpins mammalian vision through selective geometric isomerisation in retinal, strategies to manipulate 2D space by both geometric and positional isomerisation of alkenes via chemical, thermal and light-driven processes are being intensively pursued. This minireview highlights the current state of the art in activating and achieving directionality in these fundamental chemical transformations.
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Affiliation(s)
- John J Molloy
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Tobias Morack
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Ryan Gilmour
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
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32
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Vargas DF, Larghi EL, Kaufman TS. The 6π-azaelectrocyclization of azatrienes. Synthetic applications in natural products, bioactive heterocycles, and related fields. Nat Prod Rep 2019; 36:354-401. [PMID: 30090891 DOI: 10.1039/c8np00014j] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Covering: 2006 to 2018 The application of the 6π-azaelectrocyclization of azatrienes as a key strategy for the synthesis of natural products, their analogs and related bioactive or biomedically-relevant compounds (from 2006 to date) is comprehensively reviewed. Details about reaction optimization studies, relevant reaction mechanisms and conditions are also discussed.
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Affiliation(s)
- Didier F Vargas
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario, Suipacha 531, 2000 Rosario, Argentina.
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33
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Molloy JJ, Morack T, Gilmour R. Positionelle und geometrische Isomerisierung von Alkenen: der Gipfel der Atomökonomie. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906124] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- John J. Molloy
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Tobias Morack
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Ryan Gilmour
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
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34
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Schuppe AW, Zhao Y, Liu Y, Newhouse TR. Total Synthesis of (+)-Granatumine A and Related Bislactone Limonoid Alkaloids via a Pyran to Pyridine Interconversion. J Am Chem Soc 2019; 141:9191-9196. [PMID: 31117671 DOI: 10.1021/jacs.9b04508] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We report the first total synthesis of (+)-granatumine A, a limonoid alkaloid with PTP1B inhibitory activity, in ten steps. Over the course of this study, two key methodological advances were made: a cost-effective procedure for ketone α,β-dehydrogenation using allyl-Pd catalysis, and a Pd-catalyzed protocol to convert epoxyketones to 1,3-diketones. The central tetrasubstituted pyridine is formed by a convergent Knoevenagel condensation and carbonyl-selective electrocyclization cascade, which was followed by a direct transformation of a 2 H-pyran to a pyridine. These studies have led to the structural revision of two members of this family.
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Affiliation(s)
- Alexander W Schuppe
- Department of Chemistry , Yale University , 225 Prospect Street , New Haven , Connecticut 06520-8107 , United States
| | - Yizhou Zhao
- Department of Chemistry , Yale University , 225 Prospect Street , New Haven , Connecticut 06520-8107 , United States
| | - Yannan Liu
- Department of Chemistry , Yale University , 225 Prospect Street , New Haven , Connecticut 06520-8107 , United States
| | - Timothy R Newhouse
- Department of Chemistry , Yale University , 225 Prospect Street , New Haven , Connecticut 06520-8107 , United States
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35
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Mohanta N, Chaudhari MB, Digrawal NK, Gnanaprakasam B. Rapid and Multigram Synthesis of Vinylogous Esters under Continuous Flow: An Access to Transetherification and Reverse Reaction of Vinylogous Esters. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nirmala Mohanta
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Moreshwar B. Chaudhari
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Naveen Kumar Digrawal
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Boopathy Gnanaprakasam
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
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36
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Huang D, Szewczyk SM, Zhang P, Newhouse TR. Allyl-Nickel Catalysis Enables Carbonyl Dehydrogenation and Oxidative Cycloalkenylation of Ketones. J Am Chem Soc 2019; 141:5669-5674. [PMID: 30861346 PMCID: PMC7495923 DOI: 10.1021/jacs.9b02552] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We herein disclose the first report of a first-row transition metal-catalyzed α,β-dehydrogenation of carbonyl compounds using allyl-nickel catalysis. This development overcomes several limitations of previously reported allyl-palladium-catalyzed oxidation, and is further leveraged for the development of an oxidative cycloalkenylation reaction that provides access to bicycloalkenones with fused, bridged, and spirocyclic ring systems using unactivated ketone and alkene precursors.
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Affiliation(s)
- David Huang
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Suzanne M. Szewczyk
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Pengpeng Zhang
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Timothy R. Newhouse
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
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37
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Kim DE, Zhu Y, Newhouse TR. Vinylogous acyl triflates as an entry point to α,β-disubstituted cyclic enones via Suzuki-Miyaura cross-coupling. Org Biomol Chem 2019; 17:1796-1799. [PMID: 30500029 DOI: 10.1039/c8ob02573h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
An alternative protocol for the B-alkyl Suzuki-Miyaura reaction to produce cyclic α,β-disubstituted enones is reported. The use of β-triflyl enones as coupling partners in lieu of their halogenated analogs provides enhanced substrate stability to light and chromatography without adversely affecting reactivity. This protocol allows efficient access to the synthetically challenging α,β-disubstituted enone motif under mild conditions.
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Affiliation(s)
- Daria E Kim
- Department of Chemistry, Yale University, 225 Prospect St, New Haven, CT 06520-8107, USA.
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38
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Li WS, Mándi A, Liu JJ, Shen L, Kurtán T, Wu J. Xylomolones A–D from the Thai Mangrove Xylocarpus moluccensis: Assignment of Absolute Stereostructures and Unveiling a Convergent Strategy for Limonoid Biosynthesis. J Org Chem 2019; 84:2596-2606. [PMID: 30719915 DOI: 10.1021/acs.joc.8b03037] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Wan-Shan Li
- Marine Drugs Research Center, College of Pharmacy, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, P. R. China
- School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, P. R. China
| | - Attila Mándi
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, 4002 Debrecen, Hungary
| | - Jun-Jun Liu
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. China
| | - Li Shen
- Marine Drugs Research Center, College of Pharmacy, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, P. R. China
| | - Tibor Kurtán
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, 4002 Debrecen, Hungary
| | - Jun Wu
- School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, P. R. China
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39
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Hirao T. Synthetic Strategy: Palladium-Catalyzed Dehydrogenation of Carbonyl Compounds. J Org Chem 2019; 84:1687-1692. [PMID: 30668104 DOI: 10.1021/acs.joc.8b03117] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Palladium-catalyzed oxidative α,β-dehydrogenation (oxidative desilylation, decarboxylative dehydrogenation, direct dehydrogenation, and oxidative dehydroboration) of carbonyl compounds and their derivatives to α,β-unsaturated carbonyl compounds via palladium enolate intermediates is reviewed as a versatile synthetic method.
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Affiliation(s)
- Toshikazu Hirao
- The Institute of Scientific and Industrial Research , Osaka University , Mihoga-oka, Ibaraki , Osaka 567-0047 , Japan
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40
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Elkin M, Scruse AC, Turlik A, Newhouse TR. Computational and Synthetic Investigation of Cationic Rearrangement in the Putative Biosynthesis of Justicane Triterpenoids. Angew Chem Int Ed Engl 2019; 58:1025-1029. [PMID: 30575223 PMCID: PMC6499374 DOI: 10.1002/anie.201810566] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 10/30/2018] [Indexed: 02/06/2023]
Abstract
A biomimetic cationic structural rearrangement of the oleanolic acid framework is reported for the gram-scale synthesis and structural reassignment of justicioside E aglycone. The mechanism of the putative biosynthetic rearrangement is investigated with kinetic, computational, and synthetic approaches. The precursor to rearrangement was accessed through two strategic advancements: (1) synthesis of a 1,3-diketone via oxidation of a β-silyl enone, and (2) diastereoselective 1,3-diketone reduction to form a syn-1,3-diol using SmI2 with PhSH as a key additive.
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Affiliation(s)
- Masha Elkin
- Department of Chemistry, Yale University, 225 Prospect Street, PO Box 20817, New Haven, CT, 06511, USA
| | - Anthony C Scruse
- Department of Chemistry, Yale University, 225 Prospect Street, PO Box 20817, New Haven, CT, 06511, USA
| | - Aneta Turlik
- Department of Chemistry, Yale University, 225 Prospect Street, PO Box 20817, New Haven, CT, 06511, USA
| | - Timothy R Newhouse
- Department of Chemistry, Yale University, 225 Prospect Street, PO Box 20817, New Haven, CT, 06511, USA
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41
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Teskey CJ, Adler P, Gonçalves CR, Maulide N. Chemoselective α,β-Dehydrogenation of Saturated Amides. Angew Chem Int Ed Engl 2019; 58:447-451. [PMID: 30332524 PMCID: PMC6348382 DOI: 10.1002/anie.201808794] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 10/10/2018] [Indexed: 01/12/2023]
Abstract
We report a method for the selective α,β-dehydrogenation of amides in the presence of other carbonyl moieties under mild conditions. Our strategy relies on electrophilic activation coupled to in situ selective selenium-mediated dehydrogenation. The α,β-unsaturated products were obtained in moderate to excellent yields, and their synthetic versatility was demonstrated by a range of transformations. Mechanistic experiments suggest formation of an electrophilic SeIV species.
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Affiliation(s)
- Christopher J. Teskey
- University of ViennaInstitute of Organic ChemistryWähringer Strasse 381090ViennaAustria
| | - Pauline Adler
- University of ViennaInstitute of Organic ChemistryWähringer Strasse 381090ViennaAustria
| | - Carlos R. Gonçalves
- University of ViennaInstitute of Organic ChemistryWähringer Strasse 381090ViennaAustria
| | - Nuno Maulide
- University of ViennaInstitute of Organic ChemistryWähringer Strasse 381090ViennaAustria
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42
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43
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Elkin M, Scruse AC, Turlik A, Newhouse TR. Computational and Synthetic Investigation of Cationic Rearrangement in the Putative Biosynthesis of Justicane Triterpenoids. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201810566] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Masha Elkin
- Department of ChemistryYale University 225 Prospect Street, PO Box 20817 New Haven CT 06511 USA
| | - Anthony C. Scruse
- Department of ChemistryYale University 225 Prospect Street, PO Box 20817 New Haven CT 06511 USA
| | - Aneta Turlik
- Department of ChemistryYale University 225 Prospect Street, PO Box 20817 New Haven CT 06511 USA
| | - Timothy R. Newhouse
- Department of ChemistryYale University 225 Prospect Street, PO Box 20817 New Haven CT 06511 USA
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44
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Pinkerton DM, Chow S, Eisa NH, Kainth K, Vanden Berg TJ, Burns JM, Guddat LW, Savage GP, Chadli A, Williams CM. Synthesis of the seco-Limonoid BCD Ring System Identifies a Hsp90 Chaperon Machinery (p23) Inhibitor. Chemistry 2018; 25:1451-1455. [PMID: 30570197 DOI: 10.1002/chem.201805420] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 11/23/2018] [Indexed: 01/06/2023]
Abstract
D-Ring-seco-limonoids (tetranortriterpenoids), such as gedunin and xylogranin B display anti-cancer activity, acting via inhibition of Hsp90 and/or associated chaperon machinery (e.g., p23). Despite this, these natural products have received relatively little attention, both in terms of an enabling synthetic approach (which would allow access to derivatives), and as a consequence their structure-activity relationship (SAR). Disclosed herein is a generally applicable synthetic route to the BCD ring system of the seco-D-ring double bond containing limonoids. Furthermore, cell based assays revealed the first skeletal fragment that exhibited inhibition of the p23 enzyme at a level which was equipotent to that of gedunin, despite being much less structurally complex.
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Affiliation(s)
- David M Pinkerton
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Queensland, Australia
| | - Sharon Chow
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Queensland, Australia
| | - Nada H Eisa
- Georgia Cancer Center, Molecular Oncology Program, Augusta University, Augusta, GA, 30912, USA.,Biochemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Kashish Kainth
- Georgia Cancer Center, Molecular Oncology Program, Augusta University, Augusta, GA, 30912, USA
| | - Timothy J Vanden Berg
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Queensland, Australia
| | - Jed M Burns
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Queensland, Australia
| | - Luke W Guddat
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Queensland, Australia
| | - G Paul Savage
- CSIRO Manufacturing, Ian Wark Laboratory, Melbourne, 3168, Victoria, Australia
| | - Ahmed Chadli
- Georgia Cancer Center, Molecular Oncology Program, Augusta University, Augusta, GA, 30912, USA
| | - Craig M Williams
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Queensland, Australia
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45
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Teskey CJ, Adler P, Gonçalves CR, Maulide N. Chemoselektive α,β‐Dehydrierung von gesättigten Amiden. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Christopher J. Teskey
- Universität WienInstitut für organische Chemie Währinger Straße 38 1090 Wien Österreich
| | - Pauline Adler
- Universität WienInstitut für organische Chemie Währinger Straße 38 1090 Wien Österreich
| | - Carlos R. Gonçalves
- Universität WienInstitut für organische Chemie Währinger Straße 38 1090 Wien Österreich
| | - Nuno Maulide
- Universität WienInstitut für organische Chemie Währinger Straße 38 1090 Wien Österreich
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46
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Affiliation(s)
- L. Reginald Mills
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St George Street M5S 3H6 Toronto, Ontario Canada
| | - Sophie A. L. Rousseaux
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St George Street M5S 3H6 Toronto, Ontario Canada
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47
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Wu H, Luo S, Cao L, Shi H, Wang B, Wang Z. DABCO‐Mediated C−O Bond Formation from C
sp2
‐Halogen Bond‐Containing Compounds and Alkyl Alcohols. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800517] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Han‐Qing Wu
- School of Chemistry and Environment/ Key Laboratory of Theoretical Chemistry of EnvironmentSouth China Normal University Guangzhou 510006 People's Republic of China
| | - Shi‐He Luo
- School of Chemistry and Environment/ Key Laboratory of Theoretical Chemistry of EnvironmentSouth China Normal University Guangzhou 510006 People's Republic of China
- School of Chemistry and Chemical Engineering/ Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSouth China University of Technology 381 Wushan Road Guangzhou 510640 People's Republic of China
| | - Liang Cao
- School of Chemistry and Environment/ Key Laboratory of Theoretical Chemistry of EnvironmentSouth China Normal University Guangzhou 510006 People's Republic of China
- School of Chemistry and Chemical Engineering/ Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSouth China University of Technology 381 Wushan Road Guangzhou 510640 People's Republic of China
| | - Hao‐Nan Shi
- School of Chemistry and Environment/ Key Laboratory of Theoretical Chemistry of EnvironmentSouth China Normal University Guangzhou 510006 People's Republic of China
| | - Bo‐Wen Wang
- School of Chemistry and Environment/ Key Laboratory of Theoretical Chemistry of EnvironmentSouth China Normal University Guangzhou 510006 People's Republic of China
| | - Zhao‐Yang Wang
- School of Chemistry and Environment/ Key Laboratory of Theoretical Chemistry of EnvironmentSouth China Normal University Guangzhou 510006 People's Republic of China
- School of Chemistry and Chemical Engineering/ Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSouth China University of Technology 381 Wushan Road Guangzhou 510640 People's Republic of China
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48
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Song C, Yang C, Zeng H, Zhang W, Guo S, Zhu J. Rh(III)-Catalyzed Enaminone-Directed C–H Coupling with α-Diazo-α-phosphonoacetate for Reactivity Discovery: Fluoride-Mediated Dephosphonation for C–C Coupling Reactions. Org Lett 2018; 20:3819-3823. [DOI: 10.1021/acs.orglett.8b01406] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chao Song
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Chen Yang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Hua Zeng
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Wenjing Zhang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Shan Guo
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Jin Zhu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
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49
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Luo F, Lu Y, Hu M, Tian J, Zhang L, Bao W, Yan C, Huang X, Wang ZX, Peng B. Reductive ortho C–H cyanoalkylation of aryl(heteroaryl) sulfoxides: a general approach to α-aryl(heteroaryl) nitriles. Org Chem Front 2018. [DOI: 10.1039/c8qo00268a] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A catalyst-free low-temperature cyanoalkylation has been developed as a general protocol for the synthesis of α-aryl(heteroaryl) nitriles.
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Affiliation(s)
- Fan Luo
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Yu Lu
- School of Chemical Sciences
- University of the Chinese Academy of Sciences
- Beijing 100049
- China
| | - Mengjie Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Junsong Tian
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Lei Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Wangzhen Bao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Chao Yan
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Xin Huang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Zhi-Xiang Wang
- School of Chemical Sciences
- University of the Chinese Academy of Sciences
- Beijing 100049
- China
| | - Bo Peng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Normal University
- Jinhua 321004
- China
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