1
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Zhang Y, Chen L, Jia Y. Total Synthesis of Pallamolides A-E. Angew Chem Int Ed Engl 2024; 63:e202319127. [PMID: 38504637 DOI: 10.1002/anie.202319127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 03/12/2024] [Accepted: 03/19/2024] [Indexed: 03/21/2024]
Abstract
We have achieved the first total synthesis of pallamolides A-E. Of these compounds, pallamolides B-E possess intriguing tetracyclic skeletons with novel intramolecular transesterifications. Key transformations include highly diastereoselective sequential Michael addition reactions to construct the bicyclo[2.2.2]octane core with the simultaneous generation of two quaternary carbon centers, a one-pot SmI2-mediated intramolecular ketyl-enoate cyclization/ketone reduction to generate the key oxabicyclo[3.3.1]nonane moiety, and an acid-mediated deprotection/oxa-Michael addition/β-hydroxy elimination cascade sequence to assemble the tetracyclic pallamolide skeleton. Kinetic resolution of ketone 14 through Corey-Bakshi-Shibata reduction enabled the asymmetric synthesis of pallamolides A-E.
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Affiliation(s)
- Yu Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing, 100191, P. R. China
| | - Lijun Chen
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing, 100191, P. R. China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing, 100191, P. R. China
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2
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Sahoo SS, Kataria P, Kontham R. Concise and collective total syntheses of 2,4-disubstituted furan-derived natural products from hydroxyoxetanyl ketones. Org Biomol Chem 2024; 22:1475-1483. [PMID: 38284832 DOI: 10.1039/d3ob01924a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
The furan moiety, prevalent in bioactive natural products and essential drugs, presents intriguing structural features that have spurred our exploration into streamlined chemical synthesis routes for related natural products. In this study, we demonstrate the concise total synthesis of eight 2,4-disubstituted furan-derived natural products (including methylfuroic acid, rabdoketones A and B, paleofurans A and B, tournefolin C, and shikonofurans A and B). Our methodology revolves around the utilization of hydroxyoxetanyl ketones as pivotal intermediates. The approach encompasses transformations such as selective organo-catalyzed cross-ketol addition, synthesis of hydroxymethyl-tethered furans through Bi(OTf)3 catalyzed dehydrative cycloisomerization of α-hydroxyoxetanyl ketones, and a hydrogen atom transfer (HAT)-mediated oxidation of primary alcohols into the corresponding acids. This comprehensive synthetic strategy highlights the versatility of hydroxyoxetanyl ketones as invaluable building blocks in the synthesis of furan-containing natural products.
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Affiliation(s)
- Shubhranshu Shekhar Sahoo
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune-411008, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Priyanka Kataria
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune-411008, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Ravindar Kontham
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune-411008, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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3
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Zhang C, Li Y, Chu Z, Yuan S, Qiao Y, Zhang J, Li L, Zhang Y, Tian R, Tang Y, Lou H. Rearranged 19-nor-7,8-seco-labdane diterpenoids and Diels−Alder cycloadducts from the Chinese liverwort Pallavicinia ambigua: Structural elucidation, photoinduced rearrangement, and cytotoxic activity. CHINESE CHEM LETT 2023. [DOI: 10.1016/j.cclet.2023.108206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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4
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Wen X, Gao M, Chen Y, Zhao Y, Qin W, Hu L. Tunable Reaction Mode of Bifunctional Peroxides with Ketones to Access α-Oxacyclic Ketones and Enals. Org Lett 2022; 24:8387-8391. [DOI: 10.1021/acs.orglett.2c03440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiaolu Wen
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Min Gao
- College of Chemistry and Chemical Engineering, Yan’an University, Yan’an 716000, China
| | - Yiwei Chen
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Yukun Zhao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Wenling Qin
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Lin Hu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
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5
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Salem MSH, Takizawa S. New anionic cobalt(III) complexes enable enantioselective synthesis of spiro-fused oxazoline and iodoacetal derivatives. Front Chem 2022; 10:1034291. [PMID: 36311431 PMCID: PMC9606352 DOI: 10.3389/fchem.2022.1034291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 09/20/2022] [Indexed: 11/30/2022] Open
Abstract
Anionic salicylimine-based cobalt (III) complexes featuring chiral ligands derived from isoleucine amino acids were used as efficient bifunctional phase-transfer catalysts for electrophilic iodination of enol ethers. The Brønsted acids of these complexes enabled the enantioselective asymmetric iodocyclization of enol ethers, furnishing spiro-fused oxazoline derivatives in high yields with up to 90:10 er. In addition, chiral cobalt (III) complexes catalyze the asymmetric intermolecular iodoacetalization of enol ethers with various alcohols to afford 3-iodoacetal derivatives in high yields with up to 92:8 er.
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Affiliation(s)
- Mohamed S. H. Salem
- SANKEN, Osaka University, Ibaraki, Japan
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt
- *Correspondence: Mohamed S. H. Salem, ; Shinobu Takizawa,
| | - Shinobu Takizawa
- SANKEN, Osaka University, Ibaraki, Japan
- *Correspondence: Mohamed S. H. Salem, ; Shinobu Takizawa,
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6
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Yu B, Mohamed S, Ardisson J, Lannou MI, Sorin G. Silver oxide(I) promoted Conia-ene/radical cyclization for a straightforward access to furan derivatives. Chem Commun (Camb) 2022; 58:1374-1377. [PMID: 34989376 DOI: 10.1039/d1cc06379k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A novel access to fused furan cores using silver oxide(I) has been developed. Mechanistic investigations indicate the involvement of a Conia-ene reaction/radical cyclization for an expedient path to complex furan derivatives. The reaction is broad in scope with interesting atom economy and can also be conducted in a one-pot fashion from readily accessible α,β-unsaturated ketones.
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Affiliation(s)
- Bao Yu
- College of Traditional Chinese Medicine, Chongqing Medical University, Chongqing 400016, P. R. China
| | - Selkti Mohamed
- Unité CNRS UMR 8038 Université de Paris, CNRS, CiTCoM, Faculté de Pharmacie, Sorbonne Paris Cité, 4 avenue de l'Observatoire, 75270 PARIS (France) 4 avenue de l'Observatoire, F-75006 Paris, France.
| | - Janick Ardisson
- Unité CNRS UMR 8038 Université de Paris, CNRS, CiTCoM, Faculté de Pharmacie, Sorbonne Paris Cité, 4 avenue de l'Observatoire, 75270 PARIS (France) 4 avenue de l'Observatoire, F-75006 Paris, France.
| | - Marie-Isabelle Lannou
- Unité CNRS UMR 8038 Université de Paris, CNRS, CiTCoM, Faculté de Pharmacie, Sorbonne Paris Cité, 4 avenue de l'Observatoire, 75270 PARIS (France) 4 avenue de l'Observatoire, F-75006 Paris, France.
| | - Geoffroy Sorin
- Unité CNRS UMR 8038 Université de Paris, CNRS, CiTCoM, Faculté de Pharmacie, Sorbonne Paris Cité, 4 avenue de l'Observatoire, 75270 PARIS (France) 4 avenue de l'Observatoire, F-75006 Paris, France.
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7
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Zhang X, Wang Y, Chen P, Cai X, Jia Y. Protecting‐Group‐Free
Total Synthesis of (–)‐Pallambins A—D. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xiwu Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University 38 Xueyuan Road Beijing 100191 China
| | - Yuan Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University 38 Xueyuan Road Beijing 100191 China
| | - Peng Chen
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University 38 Xueyuan Road Beijing 100191 China
| | - Xinxian Cai
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University 38 Xueyuan Road Beijing 100191 China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University 38 Xueyuan Road Beijing 100191 China
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8
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Parmar K, Haghshenas P, Gravel M. Total Synthesis of (+)-Hyacinthacine A 1 Using a Chemoselective Cross-Benzoin Reaction and a Furan Photooxygenation-Amine Cyclization Strategy. Org Lett 2021; 23:1416-1421. [PMID: 33538602 DOI: 10.1021/acs.orglett.1c00090] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We report the shortest synthesis of glycosidase inhibitor (+)-hyacinthacine A1 using a highly chemoselective N-heterocyclic carbene-catalyzed cross-benzoin reaction as well as a furan photooxygenation-amine cyclization strategy. This is the first such cyclization on a furylic alcohol, an unprecedented reaction due to the notorious instability of the formed intermediates. The photooxygenation strategy was eventually incorporated into a three-step one-pot process that formed the requisite pyrrolizidine framework of (+)-hyacinthacine A1.
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Affiliation(s)
- Karnjit Parmar
- Department of Chemistry, University of Saskatchewan, Saskatoon, SK, Canada S7N 5C9
| | - Pouyan Haghshenas
- Department of Chemistry, University of Saskatchewan, Saskatoon, SK, Canada S7N 5C9
| | - Michel Gravel
- Department of Chemistry, University of Saskatchewan, Saskatoon, SK, Canada S7N 5C9
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9
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Grant PS, Brimble MA. seco-Labdanes: A Study of Terpenoid Structural Diversity Resulting from Biosynthetic C-C Bond Cleavage. Chemistry 2021; 27:6367-6389. [PMID: 33289161 DOI: 10.1002/chem.202004574] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Indexed: 11/08/2022]
Abstract
The cleavage of a C-C bond is a complexity generating process, which complements oxidation and cyclisation events in the biosynthesis of terpenoids. This process leads to increased structural diversity in a cluster of related secondary metabolites by modification of the parent carbocyclic core. In this review, we highlight the diversifying effect of C-C bond cleavage by examining the literature related to seco-labdanes-a class of diterpenoids arising from such C-C bond cleavage events.
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Affiliation(s)
- Phillip S Grant
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland, 1010, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, 23 Symonds Street, Auckland, 1010, New Zealand
| | - Margaret A Brimble
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland, 1010, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, 23 Symonds Street, Auckland, 1010, New Zealand
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10
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Peters DS, Pitts CR, McClymont KS, Stratton TP, Bi C, Baran PS. Ideality in Context: Motivations for Total Synthesis. Acc Chem Res 2021; 54:605-617. [PMID: 33476518 DOI: 10.1021/acs.accounts.0c00821] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Total synthesis-the ultimate proving ground for the invention and field-testing of new methods, exploration of disruptive strategies, final structure confirmation, and empowerment of medicinal chemistry on natural products-is one of the oldest and most enduring subfields of organic chemistry. In the early days of this field, its sole emphasis focused on debunking the concept of vitalism, that living organisms could create forms of matter accessible only to them. Emphasis then turned to the use of synthesis to degrade and reconstitute natural products to establish structure and answer questions about biosynthesis. It then evolved to not only an intricate science but also a celebrated form of art. As the field progressed, a more orderly and logical approach emerged that served to standardize the process. These developments even opened up the possibility of computer-aided design using retrosynthetic analysis. Finally, the elevation of this field to even higher levels of sophistication showed that it was feasible to synthesize any natural product, regardless of complexity, in a laboratory. During this remarkable evolution, as has been reviewed elsewhere, many of the principles and methods of organic synthesis were refined and galvanized. In the modern era, students and practitioners are still magnetically attracted to this field due to the excitement of the journey, the exhilaration of creation, and the opportunity to invent solutions to challenges that still persist. Contemporary total synthesis is less concerned with demonstrating a proof of concept or a feasible approach but rather aims for increased efficiency, scalability, and even "ideality." In general, the molecules of Nature are created biosynthetically with levels of practicality that are still unimaginable using the tools of modern synthesis. Thus, as the community strives to do more with less (i.e., innovation), total synthesis is now focused on a pursuit for simplicity rather than a competition for maximal complexity. In doing so, the practitioner must devise outside-the-box strategies supplemented with forgotten or newly invented methods to reduce step count and increase the overall economy of the approach. The downstream applications of this pursuit not only empower students who often go on to apply these skills in the private sector but also lead to new discoveries that can impact numerous disciplines of societal importance. This account traces some select case studies from our laboratory over the past five years that vividly demonstrate our own motivation for dedicating so much effort to this classic field. In aiming for simplicity, we focus on the elusive goal of achieving ideality, a term that, when taken in the proper context, can serve as a guiding light to point the way to furthering progress in organic synthesis.
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Affiliation(s)
- David S. Peters
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Cody Ross Pitts
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Kyle S. McClymont
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Thomas P. Stratton
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Cheng Bi
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Phil S. Baran
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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11
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Abstract
Leonuketal is an 8,9-seco-labdane terpenoid with a unique tetracyclic structure, owing to a diversity-generating biosynthetic C-C bond cleavage event. The first total synthesis of leonuketal is reported, featuring a Ti(III)-mediated reductive cyclization of an epoxy nitrile ether, an unusual ring-opening alkyne formation as part of an auxiliary ring strategy, and the previously undescribed Au(I)-catalyzed cyclization of a β-keto(enol)lactone to assemble the core spiroketal motif.
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Affiliation(s)
- Phillip S Grant
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, 3 Symonds Street, Auckland 1010, New Zealand
| | - Daniel P Furkert
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, 3 Symonds Street, Auckland 1010, New Zealand
| | - Margaret A Brimble
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, 3 Symonds Street, Auckland 1010, New Zealand
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12
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Brittain WDG, Cobb SL. Protecting Group-Controlled Remote Regioselective Electrophilic Aromatic Halogenation Reactions. J Org Chem 2020; 85:6862-6871. [PMID: 32378406 DOI: 10.1021/acs.joc.9b03322] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Being able to utilize a protecting group to influence remote regiocontrol offers a simple alternative approach to direct late-stage functionalization of complex organic molecules. However, protecting groups that have the ability to influence reaction regioselectivity remote to their local chemical environment are not widely reported in the literature. Herein, we report the development of remote regioselective electrophilic aromatic substitution (SEAr) reactions that are enabled via the application of the tetrafluoropyridyl (TFP) phenol-protecting group. We demonstrate that through sequential reactions and protection/deprotection of the TFP group, substitution patterns that do not conform to classical SEAr regioselectivity rules can be readily accessed.
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Affiliation(s)
- William D G Brittain
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom
| | - Steven L Cobb
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom
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13
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Riveira MJ. Studies on Biomimetic Singlet Oxygen Oxidations: Application to the Synthesis of the Alkaloid Simulenoline. JOURNAL OF NATURAL PRODUCTS 2020; 83:1309-1313. [PMID: 32233438 DOI: 10.1021/acs.jnatprod.0c00210] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The synthesis of the biologically active alkaloid simulenoline, isolated from the roots of Zanthoxylum simulans, is reported. The natural product was assembled from simple commercial reagents via initial domino Knoevenagel/oxa-6π-electrocyclization followed by a one-pot singlet-oxygen ene-reaction/reduction sequence. New insights of singlet oxygen reactivity with olefinic substrates have been revealed.
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Affiliation(s)
- Martín J Riveira
- Instituto de Química Rosario, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario-CONICET, Suipacha 531, S2002LRK, Rosario, Argentina
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14
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Chen FY, Xiang L, Zhan G, Liu H, Kang B, Zhang SC, Peng C, Han B. Highly stereoselective organocatalytic synthesis of pyrrolidinyl spirooxindoles containing halogenated contiguous quaternary carbon stereocenters. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151806] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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15
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Koshino S, Takikawa A, Ishida K, Taniguchi T, Monde K, Kwon E, Umemiya S, Hayashi Y. Inversion of the Axial Information during Oxidative Aromatization in the Synthesis of Axially Chiral Biaryls with Organocatalysis as a Key Step. Chemistry 2020; 26:4524-4530. [DOI: 10.1002/chem.201905814] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Seitaro Koshino
- Department of ChemistryGraduate School of ScienceTohoku University Sendai 980-8578 Japan
| | - Akira Takikawa
- Department of ChemistryGraduate School of ScienceTohoku University Sendai 980-8578 Japan
| | - Keiichi Ishida
- Department of ChemistryGraduate School of ScienceTohoku University Sendai 980-8578 Japan
| | - Tohru Taniguchi
- Frontier Research Center of Advanced Material andLife Science Faculty of Advanced Life ScienceHokkaido University Sapporo 060-0810 Japan
| | - Kenji Monde
- Frontier Research Center of Advanced Material andLife Science Faculty of Advanced Life ScienceHokkaido University Sapporo 060-0810 Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant MoleculesGraduate School of Science Sendai 980-8578 Japan
| | - Shigenobu Umemiya
- Department of ChemistryGraduate School of ScienceTohoku University Sendai 980-8578 Japan
| | - Yujiro Hayashi
- Department of ChemistryGraduate School of ScienceTohoku University Sendai 980-8578 Japan
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16
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Lei L, Yao YY, Jiang LJ, Lu X, Liang C, Mo DL. Synthesis of Furo[3,2- b]quinolines and Furo[2,3- b:4,5- b']diquinolines through [4 + 2] Cycloaddition of Aza- o-Quinone Methides and Furans. J Org Chem 2020; 85:3059-3070. [PMID: 31958946 DOI: 10.1021/acs.joc.9b02953] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
An approach for the construction of furo[3,2-b]quinolines and furo[2,3-b:4,5-b']diquinolines is developed through a metal-free [4 + 2] cycloaddition of easily available in situ generated aza-o-quinone methides and furans. The reaction tolerates a wide range of aza-o-quinone methides and substituted furans to afford the corresponding dihydro- or tetrahydrofuroquinolines in good to excellent yields. Mechanistic studies reveal that the reaction involves a concerted [4 + 2] cycloaddition pathway and shows a high regioselectivity of cycloaddition for a furan ring. The present method features mild reaction conditions, dearomatization of furans, high regio- and diastereoselectivity, gram-scalable preparations, and diversity of furoquinolines.
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Affiliation(s)
- Lu Lei
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China; School of Chemistry & Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Yi-Yun Yao
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China; School of Chemistry & Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Li-Juan Jiang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China; School of Chemistry & Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Xiuqiang Lu
- Fuqing Branch of Fujian Normal University, Fuzhou, Fujian 350300, China
| | - Cui Liang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China; School of Chemistry & Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Dong-Liang Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China; School of Chemistry & Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
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17
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Li Y, Xu Z, Zhu R, Zhou J, Zong Y, Zhang J, Zhu M, Jin X, Qiao Y, Zheng H, Lou H. Probing the Interconversion of Labdane Lactones from the Chinese Liverwort Pallavicinia ambigua. Org Lett 2019; 22:510-514. [DOI: 10.1021/acs.orglett.9b04270] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yi Li
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Zejun Xu
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Rongxiu Zhu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Jinchuan Zhou
- School of Pharmacy, Linyi University, Linyi 276000, China
| | - Yan Zong
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Jiaozhen Zhang
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Mingzhu Zhu
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Xueyang Jin
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Yanan Qiao
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Hongbo Zheng
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Hongxiang Lou
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
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18
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Zhang X, Cai X, Huang B, Guo L, Gao Z, Jia Y. Enantioselective Total Syntheses of Pallambins A–D. Angew Chem Int Ed Engl 2019; 58:13380-13384. [DOI: 10.1002/anie.201907523] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Indexed: 01/25/2023]
Affiliation(s)
- Xiwu Zhang
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Xinxian Cai
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Bin Huang
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Lei Guo
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Zhongrun Gao
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
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19
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Zhang X, Cai X, Huang B, Guo L, Gao Z, Jia Y. Enantioselective Total Syntheses of Pallambins A–D. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907523] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Xiwu Zhang
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Xinxian Cai
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Bin Huang
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Lei Guo
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Zhongrun Gao
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
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20
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21
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Wan Y, Zhang Z, Ma N, Bi J, Zhang G. Acylamino-Directed Specific Sequential Difunctionalizations of Anilides via Metal-Free Relay Reactions for p-Oxygen and o-Nitrogen Incorporation. J Org Chem 2018; 84:780-791. [DOI: 10.1021/acs.joc.8b02636] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yameng Wan
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Zhiguo Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Nana Ma
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Jingjing Bi
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Guisheng Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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22
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Enantioselective intermolecular iodoacetalization of enol ethers catalyzed by chiral Co(III)-complex-templated Brønsted acids. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.08.047] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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23
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Mi P, Wang H, Zhao R, Song J. Tandem O-H Insertion/[3,3]-Sigmatropic Rearrangement of Rhodium Carbenoids with 2-Furfuryl Alcohols: A Strategy To Access Polysubstituted Furans. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701217] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Pengbing Mi
- College of Life Science; Jilin University; 130024 Changchun China
- Department of Chemistry; Northeast Normal University; 130024 Changchun China
| | - Hannan Wang
- College of Life Science; Jilin University; 130024 Changchun China
- Department of Chemistry; Northeast Normal University; 130024 Changchun China
| | - Rui Zhao
- Department of Urology; China-Japan Union Hospital of Jilin University; 130024 Changchun China
| | - Jinna Song
- Department of Chemistry; Northeast Normal University; 130024 Changchun China
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24
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Abstract
The formal total synthesis of (±)-lycojaponicumin C has been accomplished. Key transformations include a Rh-catalyzed formal [3 + 2] cycloaddition reaction to construct the bicyclic [3.3.0] scaffold bearing two vicinal quaternary carbon centers, a stereoselective γ-hydroxyl directed Michael addition to introduce the vinyl group at a bulky position, and a late-stage ring-closing metathesis reaction to form the cyclohexanone ring.
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Affiliation(s)
- Nan Zheng
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Shenzhen 518055, China
| | - Lijie Zhang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Shenzhen 518055, China
| | - Jianxian Gong
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Shenzhen 518055, China
| | - Zhen Yang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Shenzhen 518055, China.,Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University , Beijing 100871, China
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25
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Hao HD, Trauner D. Furans as Versatile Synthons: Total Syntheses of Caribenol A and Caribenol B. J Am Chem Soc 2017; 139:4117-4122. [DOI: 10.1021/jacs.7b00234] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Hong-Dong Hao
- Department of Chemistry and Center for
Integrated Protein Science, Ludwig-Maximilians-Universität München, Butenandtstrasse
5-13, 81377 München, Germany
| | - Dirk Trauner
- Department of Chemistry and Center for
Integrated Protein Science, Ludwig-Maximilians-Universität München, Butenandtstrasse
5-13, 81377 München, Germany
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26
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Hou WY, Wu YK. Palladium-Catalyzed α-Arylation of Cyclic Vinylogous Esters for the Synthesis of γ-Arylcyclohexenones and Total Synthesis of Aromatic Podocarpane Diterpenoids. Org Lett 2017; 19:1220-1223. [DOI: 10.1021/acs.orglett.7b00268] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Wen-Yi Hou
- Department of Applied Chemistry, National Chiao Tung University, 1001 University Road, Hsinchu 30010, Taiwan
| | - Yen-Ku Wu
- Department of Applied Chemistry, National Chiao Tung University, 1001 University Road, Hsinchu 30010, Taiwan
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29
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Montagnon T, Kalaitzakis D, Sofiadis M, Vassilikogiannakis G. Chemoselective photooxygenations of furans bearing unprotected amines: their use in alkaloid synthesis. Org Biomol Chem 2016; 14:8636-8640. [DOI: 10.1039/c6ob01689h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unprotected amines can be included in furan-containing substrates without disrupting the reactions of singlet oxygen with the furan nuclei; progress towards protecting group-free synthesis of alkaloids.
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Affiliation(s)
- T. Montagnon
- Department of Chemistry
- University of Crete
- 71003 Iraklion
- Greece
| | - D. Kalaitzakis
- Department of Chemistry
- University of Crete
- 71003 Iraklion
- Greece
| | - M. Sofiadis
- Department of Chemistry
- University of Crete
- 71003 Iraklion
- Greece
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