1
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Liu Y, Zhao J, Hong R. Toward the Briarane Core via 1,3-Dipolar Cycloaddition. Org Lett 2024. [PMID: 38804559 DOI: 10.1021/acs.orglett.4c01411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
The complete C20 framework of brianthein W was established, featuring hydroboration/allylation, to provide the C1-C2 quaternary/tertiary stereoarray with excellent stereocontrol. Intramolecular nitrile oxide cycloaddition (INOC) was adopted as the key transformation to establish the trans-fused 6/10-bicyclic ring system. Evolution of the second INOC event revealed the intricacies governing regioselectivity, which ultimately led to construction of the highly strained 10-membered carbocycle.
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Affiliation(s)
- Yichen Liu
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P.R. China
- University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Jiangang Zhao
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P.R. China
- University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Ran Hong
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P.R. China
- University of Chinese Academy of Sciences, Beijing 101408, P.R. China
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2
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Liu YC, Rolfes JD, Björklund J, Deska J. Fully Biocatalytic Rearrangement of Furans to Spirolactones. ACS Catal 2023; 13:7256-7262. [PMID: 37288097 PMCID: PMC10242749 DOI: 10.1021/acscatal.3c00132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 04/10/2023] [Indexed: 06/09/2023]
Abstract
A multienzymatic pathway enables the preparation of optically pure spirolactone building blocks. In a streamlined one-pot reaction cascade, the combination of chloroperoxidase, an oxidase, and an alcohol dehydrogenase renders an efficient reaction cascade for the conversion of hydroxy-functionalized furans to the spirocyclic products. The fully biocatalytic method is successfully employed in the total synthesis of the bioactive natural product (+)-crassalactone D, and as the key module in a chemoenzymatic route yielding lanceolactone A.
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Affiliation(s)
- Yu-Chang Liu
- Department
of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, 00560 Helsinki, Finland
- Department
of Chemistry, Aalto University, Kemistintie 1, 02150 Espoo, Finland
| | - J. D. Rolfes
- Albert
Hofmann Institute for Physiochemical Sustainability, Albert-Schweitzer-Street 22, 32602 Vlotho, Germany
| | - Joel Björklund
- Department
of Chemistry, Aalto University, Kemistintie 1, 02150 Espoo, Finland
| | - Jan Deska
- Department
of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, 00560 Helsinki, Finland
- Department
of Chemistry, Aalto University, Kemistintie 1, 02150 Espoo, Finland
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3
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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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4
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Gou B, Tang Y, Lin Y, Yu L, Jian Q, Sun H, Chen J, Zhou L. Modular Construction of Heterobiaryl Atropisomers and Axially Chiral Styrenes via All‐Carbon Tetrasubstituted VQMs. Angew Chem Int Ed Engl 2022; 61:e202208174. [DOI: 10.1002/anie.202208174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Indexed: 02/06/2023]
Affiliation(s)
- Bo‐Bo Gou
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
| | - Yue Tang
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
| | - Yan‐Hong Lin
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
| | - Le Yu
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
| | - Qing‐Song Jian
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
| | - Huai‐Ri Sun
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
| | - Jie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
| | - Ling Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
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5
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Gou BB, Tang Y, Lin YH, Yu L, Jian QS, Sun HR, Chen J, Zhou L. Modular Construction of Heterobiaryl Atropisomers and Axially Chiral Styrenes via All‐Carbon Tetrasubstituted VQMs. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bo-Bo Gou
- Northwest University College of Chemistry & Materials Science CHINA
| | - Yue Tang
- Northwest University College of Chemistry & Materials Science CHINA
| | - Yan-Hong Lin
- Northwest University College of Chemistry & Materials Science CHINA
| | - Le Yu
- Northwest University College of Chemistry & Materials Science CHINA
| | - Qing-Song Jian
- Northwest University College of Chemistry & Materials Science CHINA
| | - Huai-Ri Sun
- Northwest University College of Chemistry & Materials Science CHINA
| | - Jie Chen
- Northwest University College of Chemistry & Materials Science CHINA
| | - Ling Zhou
- Northwest University College of Chemistry & Materials Science 1 Xuefu Ave., Chang’an District 710127 Xi'an CHINA
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6
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Yan HW, Zhao LH, Zhang X, Yang YN, Yuan X, Zhang PC. Photoinduced Irreversible Intramolecular Proton Transfer of Arnebinones B, D, and E: The Case of Photoenolization at the p-Benzoquinone-CH 2/CH-π System. JOURNAL OF NATURAL PRODUCTS 2021; 84:2981-2989. [PMID: 34784203 DOI: 10.1021/acs.jnatprod.1c00830] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Arnebinones B, E, and D (1-3) have been found to be sensitive to light, generating complex and diverse proton transfer products when triggered by light. A unique two-step irreversible intramolecular proton transfer of 1 produced five scalemic mixtures, of which four possessed intriguing dual planar chirality. The unprecedented orientation epimerization equilibrium of the intra-annular double bond was first observed and researched in the homologous meroterpenoids by HPLC monitoring and DFT calculations. A "p-benzoquinone-CH2/CH-π" moiety in the structure was the common key feature for the occurrence of this type of photoenolization reaction. The product transformation processes and universality of this photoinduced irreversible proton transfer reaction were analyzed together with the cytotoxic activities of arnebinones B, D, and E, and their photoreaction products.
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Affiliation(s)
- Hai-Wei Yan
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Ling-Hao Zhao
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Xu Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Ya-Nan Yang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Xiang Yuan
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Pei-Cheng Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
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7
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Recent Advances in Oxa-6π Electrocyclization Reactivity for the Synthesis of Privileged Natural Product Scaffolds. ORGANICS 2021. [DOI: 10.3390/org2040021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The stunning advances in understanding the reactivity and selectivity principles of asymmetric pericyclic reactions have had a profound impact on the synthetic planning of complex natural products. Indeed, electrocyclizations, cycloadditions, and sigmatropic rearrangements enable synthetic chemists to craft highly functionalized scaffolds that would not otherwise be possible with a similar atom-, step-, and redox-economy. In this review, selected examples from the last two decades of research (2003–2020) on tandem processes combining oxa-6π electrocyclic reactions are discussed in terms of reactivity challenges, inherent reversibility, and key structural bond formation in the assembly of natural products. A particular emphasis is given to the electrocyclic ring-closures in the tandem processes featuring Knoevenagel-type condensations, Diels–Alder cycloadditions, Stille couplings, and oxidative dearomatizations. The synthetic manifolds reviewed here illustrate how oxa-6π electrocyclizations are intimately linked to the construction of complex natural product scaffolds and have inspired a number of biomimetic syntheses in the laboratory.
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8
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Huynh TH, Lee GH, Fang LS, Sheu JH, Sung PJ. Briarenols F–H: New polyoxygenated briarane diterpenoids produced by the octocoral Briareum excavatum. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151826] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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9
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Sung PJ, Hwang TL, Wu YC, Chen YH, Chin HK, Peng BR, Chen YY, Hu CC, Zheng LG, Huynh TH, Su TP, Zhang YL, Wen ZH. Survey of Briarane-Type Diterpenoids – Part VII. HETEROCYCLES 2020. [DOI: 10.3987/rev-19-925] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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10
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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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11
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Molina SL, Forero AM, Ayala FI, Puyana M, Zea S, Castellanos L, Muñoz D, Arboleda G, Sandoval-Hernández AG, Ramos FA. Metabolic Profiling of the Soft Coral Erythropodium caribaeorum (Alcyonacea: Anthothelidae) from the Colombian Caribbean Reveals Different Chemotypes. Mar Drugs 2019; 18:E4. [PMID: 31861453 PMCID: PMC7024379 DOI: 10.3390/md18010004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 10/11/2019] [Accepted: 10/12/2019] [Indexed: 12/23/2022] Open
Abstract
The Caribbean soft coral Erythropodium caribaeorum is a rich source of erythrolides-chlorinated briarane diterpenoids. These compounds have an ecological role as feeding deterrents, with a wide variation in their composition depending on the location where the sample is collected. In Colombia, this soft coral can be found at different locations in the Caribbean Sea including Santa Marta, Islas del Rosario, and Providencia-three environmentally different coral reef areas in the south and southwest Caribbean Sea. In order to evaluate differences in erythrolide composition, the metabolic profiles of samples from each of these locations were analyzed by HPLC-MS. Principal component analysis showed changes in the diterpene composition according to the sample origin. Diterpenes from samples collected at each location were isolated to describe the three chemotypes. The chemotype from Santa Marta was highly diverse, with the new erythrolides W and X together with eight known erythrolides. The sample from Islas del Rosario showed a low diversity chemotype constituted by high amounts of erythrolide A and B. The chemotype from Providencia showed low chemical diversity with only two main compounds-erythrolide V and R. Evaluation of cytotoxic activity against the human cancer cell lines PC-3, MCF7, and A549 showed erythrolides A and B as the more active compounds with IC50 values in the range from 2.45 to 30 μM.
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Affiliation(s)
- Sandra L. Molina
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
| | - Abel M. Forero
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
| | - Farja I. Ayala
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
| | - Mónica Puyana
- Departamento de Ciencias Biológicas y Ambientales, Facultad de Ciencias Naturales e Ingeniería, Universidad Jorge Tadeo Lozano Sede Bogotá, Cra 4 22-6,1, 110010 Bogotá, Colombia;
| | - Sven Zea
- Instituto de Estudios en Ciencias del Mar-CECIMAR, Universidad Nacional de Colombia Sede Caribe, 470006 Santa Marta, Colombia;
| | - Leonardo Castellanos
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
| | - Diego Muñoz
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
- Facultad de Ciencias, Universidad de Ciencias Aplicadas y Ambientales, 111166 Bogotá, Colombia
| | - Gonzalo Arboleda
- Instituto de Genética Humana, Universidad Nacional de Colombia Sede Bogotá, 111112 Bogotá, Colombia;
| | - Adrián G. Sandoval-Hernández
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
- Instituto de Genética Humana, Universidad Nacional de Colombia Sede Bogotá, 111112 Bogotá, Colombia;
| | - Freddy A. Ramos
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
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12
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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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13
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Kutateladze AG, Krenske EH, Williams CM. Reassignments and Corroborations of Oxo‐Bridged Natural Products Directed by OSE and DU8+ NMR Computation. Angew Chem Int Ed Engl 2019; 58:7107-7112. [DOI: 10.1002/anie.201902777] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Indexed: 11/09/2022]
Affiliation(s)
| | - Elizabeth H. Krenske
- School of Chemistry and Molecular BiosciencesUniversity of Queensland Brisbane 4072 Queensland Australia
| | - Craig M. Williams
- School of Chemistry and Molecular BiosciencesUniversity of Queensland Brisbane 4072 Queensland Australia
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14
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Kutateladze AG, Krenske EH, Williams CM. Reassignments and Corroborations of Oxo‐Bridged Natural Products Directed by OSE and DU8+ NMR Computation. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902777] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Elizabeth H. Krenske
- School of Chemistry and Molecular BiosciencesUniversity of Queensland Brisbane 4072 Queensland Australia
| | - Craig M. Williams
- School of Chemistry and Molecular BiosciencesUniversity of Queensland Brisbane 4072 Queensland Australia
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15
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Tejedor D, Delgado-Hernández S, Diana-Rivero R, Díaz-Díaz A, García-Tellado F. A Domino Strategy for the Synthesis of 2H
-Pyrans from Propargyl Vinyl Ethers. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801847] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- David Tejedor
- Instituto de Productos Naturales y Agrobiología; Consejo Superior de Investigaciones Científicas, Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife; Spain
| | - Samuel Delgado-Hernández
- Instituto de Productos Naturales y Agrobiología; Consejo Superior de Investigaciones Científicas, Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife; Spain
- Doctoral and Postgraduate School; Universidad de La Laguna; Spain
| | - Raquel Diana-Rivero
- Instituto de Productos Naturales y Agrobiología; Consejo Superior de Investigaciones Científicas, Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife; Spain
- Doctoral and Postgraduate School; Universidad de La Laguna; Spain
| | - Abián Díaz-Díaz
- Instituto de Productos Naturales y Agrobiología; Consejo Superior de Investigaciones Científicas, Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife; Spain
- Doctoral and Postgraduate School; Universidad de La Laguna; Spain
| | - Fernando García-Tellado
- Instituto de Productos Naturales y Agrobiología; Consejo Superior de Investigaciones Científicas, Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife; Spain
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16
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Crimmins MT, Zhang Y, Williams PS. Approach to the Synthesis of Briarane Diterpenes through a Dianionic Claisen Rearrangement and Ring-Closing Metathesis. Org Lett 2017; 19:3907-3910. [DOI: 10.1021/acs.orglett.7b01806] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael T. Crimmins
- Kenan, Caudill, Venable,
and Murray Laboratories of Chemistry University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Yan Zhang
- Kenan, Caudill, Venable,
and Murray Laboratories of Chemistry University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Philip S. Williams
- Kenan, Caudill, Venable,
and Murray Laboratories of Chemistry University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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17
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Donald JR, Unsworth WP. Ring-Expansion Reactions in the Synthesis of Macrocycles and Medium-Sized Rings. Chemistry 2017; 23:8780-8799. [DOI: 10.1002/chem.201700467] [Citation(s) in RCA: 147] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Indexed: 01/20/2023]
Affiliation(s)
- James R. Donald
- Department of Chemistry; University of York; Heslington, York YO10 5DD UK
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18
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Song L, Huang F, Guo L, Ouyang MA, Tong R. A cascade Claisen rearrangement/o-quinone methide formation/electrocyclization approach to 2H-chromenes. Chem Commun (Camb) 2017; 53:6021-6024. [DOI: 10.1039/c7cc03037a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new approach to 8-substituted 2H-chromenes is developed, featuring a novel cascade aromatic Claisen rearrangement/o-quinone methide formation/6π-electrocyclization.
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Affiliation(s)
- Liyan Song
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops
- Institute of Plant Virology
- Fujian Agriculture and Forestry University
- Fuzhou
- China
| | - Fang Huang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops
- Institute of Plant Virology
- Fujian Agriculture and Forestry University
- Fuzhou
- China
| | - Liwen Guo
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops
- Institute of Plant Virology
- Fujian Agriculture and Forestry University
- Fuzhou
- China
| | - Ming-An Ouyang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops
- Institute of Plant Virology
- Fujian Agriculture and Forestry University
- Fuzhou
- China
| | - Rongbiao Tong
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Kowloon
- China
| |
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