1
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Cheng G, Zhao P, Su H, Wahab A, Gao Z, Gou J, Yu B. Furan Dearomatization: A Route to Diverse Fluoroalkyl/Aryl Triazoles. J Org Chem 2024; 89:4349-4365. [PMID: 38497642 DOI: 10.1021/acs.joc.3c02402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
The 5-fluoroalkyl-1,2,3-triazoles, serving as a pivotal element in medicinal chemistry, hold substantial research significance. In this work, we developed a furan dearomatization reaction for the synthesis of various 5-fluoroalkyl-1,2,3-triazoles, which contains -CF3, -CF2H, -CF2CF3, -CF2CF2CF3, -CF2CO2Et, and -C6F5. This methodology relies on the intermolecular [3 + 2] cycloaddition/furan ring-opening triggered by α-fluoroalkyl furfuryl cation with azides to stereoselectively synthesize a series of (E)-fluoroalkyl enone triazoles. The reaction proceeds without metal participation, exhibits excellent substrate tolerance, and has excellent synthetic utility.
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Affiliation(s)
- Guanghai Cheng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Penggang Zhao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Hang Su
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Abdul Wahab
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Ziwei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Jing Gou
- Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Normal University, Xi'an 710062, China
| | - Binxun Yu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
- SCNU Qingyuan Institute of Science and Technology Innovation Co., Ltd., Qingyuan 511517, China
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2
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Wang L, Chen S, Gao X, Liang X, Lv W, Zhang D, Jin X. Recent progress in chemistry and bioactivity of monoterpenoid indole alkaloids from the genus gelsemium: a comprehensive review. J Enzyme Inhib Med Chem 2023; 38:2155639. [PMID: 36629436 PMCID: PMC9848241 DOI: 10.1080/14756366.2022.2155639] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Monoterpenoid indole alkaloids (MIAs) represent a major class of active ingredients from the plants of the genus Gelsemium. Gelsemium MIAs with diverse chemical structures can be divided into six categories: gelsedine-, gelsemine-, humantenine-, koumine-, sarpagine- and yohimbane-type. Additionally, gelsemium MIAs exert a wide range of bioactivities, including anti-tumour, immunosuppression, anti-anxiety, analgesia, and so on. Owing to their fascinating structures and potent pharmaceutical properties, these gelsemium MIAs arouse significant organic chemists' interest to design state-of-the-art synthetic strategies for their total synthesis. In this review, we comprehensively summarised recently reported novel gelsemium MIAs, potential pharmacological activities of some active molecules, and total synthetic strategies covering the period from 2013 to 2022. It is expected that this study may open the window to timely illuminate and guide further study and development of gelsemium MIAs and their derivatives in clinical practice.
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Affiliation(s)
- Lin Wang
- School of Pharmacy, China Medical University, Shenyang, China
| | - Siyu Chen
- China Medical University-Queen’s University of Belfast Joint College, China Medical University, Shenyang, China
| | - Xun Gao
- Jiangsu Institute Marine Resources Development, Jiangsu Ocean University, Lianyungang, China
| | - Xiao Liang
- School of Pharmacy, Liaoning University, Shenyang, China
| | - Weichen Lv
- Department of Clinical Medicine, Dalian University, Dalian, China
| | - Dongfang Zhang
- School of Pharmacy, China Medical University, Shenyang, China,CONTACT Dongfang Zhang
| | - Xin Jin
- School of Pharmacy, China Medical University, Shenyang, China,Xin Jin School of Pharmacy, China Medical University, Shenyang, 110122, China
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3
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Kuriyama Y, Sasano Y, Iwabuchi Y. Azetidine synthesis by La(OTf) 3-catalyzed intramolecular regioselective aminolysis of cis-3,4-epoxy amines. Front Chem 2023; 11:1251299. [PMID: 37795386 PMCID: PMC10546187 DOI: 10.3389/fchem.2023.1251299] [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: 07/01/2023] [Accepted: 08/22/2023] [Indexed: 10/06/2023] Open
Abstract
Azetidine is a prevalent structural motif found in various biologically active compounds. In this research paper, we report La(OTf)3-catalyzed intramolecular regioselective aminolysis of cis-3,4-epoxy amines to afford azetidines. This reaction proceeded in high yields even in the presence of acid-sensitive and Lewis basic functional groups.
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Affiliation(s)
| | | | - Yoshiharu Iwabuchi
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
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4
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Ji H, Knutson PC, Harrington CM, Ke YT, Ferreira EM. The Analysis of Two Distinct Strategies toward the Enantioselective Formal Total Synthesis of (+)-Gelsenicine. Tetrahedron 2023; 134:133278. [PMID: 37034426 PMCID: PMC10077972 DOI: 10.1016/j.tet.2023.133278] [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] [Indexed: 01/22/2023]
Abstract
A full account of a formal enantioselective total synthesis of (+)-gelsenicine is described. Separate strategies based on catalytic cycloisomerization as the central step are considered. One plan involves chirality transfer from enantioenriched substrates, while the other employs asymmetric catalysis. The chirality transfer strategy is less effective, while in the latter, phosphoramidite- and bisphosphine-gold complexes are tested and ultimately provide a key intermediate in high enantiopurity in our Gelsemium alkaloid syntheses.
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Affiliation(s)
- Haofan Ji
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Phil C Knutson
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | | | - Yan-Ting Ke
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Eric M Ferreira
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
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5
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Knutson PC, Ji H, Harrington CM, Ke YT, Ferreira EM. Chirality Transfer and Asymmetric Catalysis: Two Strategies toward the Enantioselective Formal Total Synthesis of (+)-Gelsenicine. Org Lett 2022; 24:4971-4976. [PMID: 35796493 DOI: 10.1021/acs.orglett.2c01974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two strategies are described en route to an enantioselective total synthesis of gelsenicine. One approach centers on a chirality transfer cycloisomerization that ultimately fell short. Separately, an asymmetric catalysis route utilizing bisphosphine-gold-catalyzed cycloisomerization was pursued. A catalytic system was identified that provided a synthetic intermediate in our Gelsemium alkaloid syntheses in high enantiopurity and with absolute configuration determined by electronic circular dichroism, thus representing an enantioselective formal total synthesis of (+)-gelsenicine.
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Affiliation(s)
- Phil C Knutson
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Haofan Ji
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | | | - Yan-Ting Ke
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Eric M Ferreira
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
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6
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Petruncio G, Shellnutt Z, Elahi-Mohassel S, Alishetty S, Paige M. Skipped dienes in natural product synthesis. Nat Prod Rep 2021; 38:2187-2213. [PMID: 34913051 DOI: 10.1039/d1np00012h] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Covering: 2000-2020The 1,4-diene motif, also known as a skipped diene, is widespread across various classes of natural products including alkaloids, fatty acids, terpenoids, and polyketides as part of either the finalized structure or a biosynthetic intermediate. The prevalence of this nonconjugated diene system in nature has resulted in numerous encounters in the total synthesis literature. However, skipped dienes have not been extensively reviewed, which could be attributed to overshadowing by the more recognized 1,3-diene system. In this review, we aim to highlight the relevance of skipped dienes in natural products through the lens of total synthesis. Subjects that will be covered include nomenclature, structural properties, prevalence in natural products, synthetic strategies and the future direction of the field.
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Affiliation(s)
- Greg Petruncio
- Department of Chemistry & Biochemistry, George Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, USA.
| | - Zachary Shellnutt
- Department of Chemistry & Biochemistry, George Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, USA.
| | - Synah Elahi-Mohassel
- Department of Chemistry & Biochemistry, George Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, USA.
| | - Suman Alishetty
- Department of Bioengineering, George Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, USA
| | - Mikell Paige
- Department of Chemistry & Biochemistry, George Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, USA.
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7
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Xing Q, Hao Z, Hou J, Li G, Gao Z, Gou J, Li C, Yu B. Manganese-Catalyzed Achmatowicz Rearrangement Using Green Oxidant H 2O 2. J Org Chem 2021; 86:9563-9586. [PMID: 34181426 DOI: 10.1021/acs.joc.1c00858] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Oxidation reactions have been extensively studied in the context of the transformations of biomass-derived furans. However, in contrast to the vast literature on utilizing the stoichiometric oxidants, such as m-CPBA and NBS, catalytic methods for the oxidative furan-recyclizations remain scarcely investigated. Given this, we report a means of manganese-catalyzed oxidations of furan with low loading, achieving the Achmatowicz rearrangement in the presence of hydrogen peroxide as an environmentally benign oxidant under mild conditions with wide functional group compatibility.
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Affiliation(s)
- Qingzhao Xing
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Zhe Hao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Jing Hou
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Gaoqiang Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Ziwei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Jing Gou
- Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Normal University, Xi'an 710062, China
| | - Chaoqun Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Binxun Yu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.,SCNU Qingyuan Institute of Science and Technology Innovation Co., Ltd., Qingyuan 511517, China
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8
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Abstract
The field of total synthesis has reached a stage in which emphasis has been increasingly focused on synthetic efficiency rather than merely achieving the synthesis of a target molecule. The pursuit of synthetic efficiency, typically represented by step count and overall yield, is a rich source of inspiration and motivation for synthetic chemists to invent innovative strategies and methods. Among them, convergent strategy has been well recognized as an effective approach to improve efficiency. This strategy generally involves coupling of fragments with similar complexity to furnish the target molecule via subsequent cyclization or late-stage functionalization. Thus, methodologies that enable effective connection of fragments are critical to devising a convergent plan. In our laboratory, convergent strategy has served as a long-standing principle for pursuing efficient synthesis during the course of planning and implementing synthetic projects. In this Account, we summarize our endeavors in the convergent synthesis of natural products over the last ten years. We show how we identify reasonable bond disconnections and employ enabling synthetic methodologies to maximize convergency, leading to the efficient syntheses of over two-dozen highly complex molecules from eight disparate families.In detail, we categorize our work into three parts based on the diverse reaction types for fragment assembly. First, we demonstrate the application of a powerful single-electron reducing agent, SmI2, in a late-stage cyclization step, forging the polycyclic skeletons of structurally fascinating Galbulimima alkaloids and Leucosceptrum sesterterpenoids. Next, we showcase how three different types of cycloaddition reactions can simultaneously construct two challenging C-C bonds in a single step, providing concise entries to three distinct families, namely, spiroquinazoline alkaloids, gracilamine, and kaurane diterpenoids. In the third part, we describe convergent assembly of ent-kaurane diterpenoids, gelsedine-type alkaloids, and several drug molecules via employing some bifunctional synthons. To access highly oxidized ent-kaurane diterpenoids, we introduce the hallmark bicyclo[3.2.1]octane ring system at an early stage, and then execute coupling and cyclization by means of a Hoppe's homoaldol reaction and a Mukaiyama-Michael-type addition, respectively. Furthermore, we showcase how the orchestrated combination of an asymmetric Michael addition, a tandem oxidation-aldol reaction and a pinacol rearrangement can dramatically improve the efficiency in synthesizing gelsedine-type alkaloids, with nary a protecting group. Finally, to address the supply issue of several drugs, including anti-influenza drug zanamivir and antitumor agent Et-743, we exploit scalable and practical approaches to provide advantages over current routes in terms of cost, ease of execution, and efficiency.
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Affiliation(s)
- Yang Gao
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
| | - Dawei Ma
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
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9
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Xie S, Ning C, Yu Q, Hou J, Xu J. Protecting‐Group‐Free
Total Synthesis and Biological Investigation of Cabucine Oxindole A
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000460] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Shengling Xie
- Department of Chemistry and Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis and Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Southern University of Science and Technology, Shenzhen Guangdong 518055 China
| | - Chengqing Ning
- Department of Chemistry and Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis and Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Southern University of Science and Technology, Shenzhen Guangdong 518055 China
| | - Qingzhen Yu
- Department of Chemistry and Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis and Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Southern University of Science and Technology, Shenzhen Guangdong 518055 China
| | - Jieping Hou
- Department of Chemistry and Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis and Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Southern University of Science and Technology, Shenzhen Guangdong 518055 China
| | - Jing Xu
- Department of Chemistry and Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis and Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Southern University of Science and Technology, Shenzhen Guangdong 518055 China
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10
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Axelsson A, Hammarvid E, Rahm M, Sundén H. DBU‐Catalyzed Ring‐Opening and Retro‐Claisen Fragmentation of Dihydropyranones. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000858] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Anton Axelsson
- Chemistry and Chemical Engineering Chalmers University of Technology Kemivägen 10 412 96 Göteborg Sweden
| | - Emmelie Hammarvid
- Chemistry and Chemical Engineering Chalmers University of Technology Kemivägen 10 412 96 Göteborg Sweden
| | - Martin Rahm
- Chemistry and Chemical Engineering Chalmers University of Technology Kemivägen 10 412 96 Göteborg Sweden
| | - Henrik Sundén
- Chemistry and Chemical Engineering Chalmers University of Technology Kemivägen 10 412 96 Göteborg Sweden
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11
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Xu X, Zhong Y, Xing Q, Gao Z, Gou J, Yu B. Ytterbium-Catalyzed Intramolecular [3 + 2] Cycloaddition based on Furan Dearomatization to Construct Fused Triazoles. Org Lett 2020; 22:5176-5181. [DOI: 10.1021/acs.orglett.0c01780] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Xiaoming Xu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Ying Zhong
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Qingzhao Xing
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Ziwei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Jing Gou
- Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Normal University, Xi’an 710062, China
| | - Binxun Yu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an 710062, China
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Science, Shaanxi Normal University, Xi’an 710062, China
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12
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Zhong Y, Xu X, Xing Q, Yang S, Gou J, Gao Z, Yu B. Furfuryl Cation Induced Three-Component Reaction to Synthesize Triazole-Substituted Thioesters. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000299] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ying Zhong
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
| | - Xiaoming Xu
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
| | - Qingzhao Xing
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
| | - Song Yang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology; Changzhou University; 213164 Changzhou China
| | - Jing Gou
- Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Normal University; 710062 Xi'an China
| | - Ziwei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
| | - Binxun Yu
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
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13
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Takizawa S. Organocatalytic Synthesis of Highly Functionalized Heterocycles by Enantioselective aza-Morita-Baylis-Hillman-Type Domino Reactions. Chem Pharm Bull (Tokyo) 2020; 68:299-315. [PMID: 32238648 DOI: 10.1248/cpb.c19-00900] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Organocatalytic enantioselective domino reactions are an extremely attractive methodology, as their use enables the construction of complex chiral skeletons from readily available starting materials in two or more steps by a single operation under mild reaction conditions. Thus, these reactions can save both the quantity of chemicals and length of time typically required for the isolation and/or purification of synthetic intermediates. Additionally, no metal contamination of the products occurs, given that organocatalysts include no expensive or toxic metals. The aza-Morita-Baylis-Hillman (aza-MBH) reaction is an atom-economical carbon-carbon bond-forming reaction between α,β-unsaturated carbonyl compounds and imines mediated by Lewis base (LB) catalysts, such as nucleophilic phosphines and amines. aza-MBH products are functionalized chiral β-amino acid derivatives that are highly valuable as pharmaceutical raw materials. Although various enantioselective aza-MBH processes have been investigated, very few studies of aza-MBH-type domino reactions have been reported due to the complexity of the aza-MBH process, which involves a Michael/Mannich/H-transfer/β-elimination sequence. Accordingly, in this review article, our recent efforts in the development of enantioselective domino reactions initiated by MBH processes are described. In the domino reactions, chiral organocatalysts bearing Brønsted acid (BA) and/or LB units impart synergistic activation to substrates, leading to the easy synthesis of highly functionalized heterocycles (some of which have tetrasubstituted and/or quaternary carbon stereocenters) in high yield and enantioselectivity.
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Affiliation(s)
- Shinobu Takizawa
- Department of Synthetic Organic Chemistry, Artificial Intelligence Research Center, The Institute of Scientific and Industrial Research, Osaka University
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14
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Bracher F. Dimethylformamide Acetals and Bredereck’s Reagent as Building Blocks in Natural Products Total Synthesis. MINI-REV ORG CHEM 2020. [DOI: 10.2174/1570193x16666181204122143] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Dimethylformamide acetals and Bredereck’s reagent (tert-butoxy-bis(dimethylamino)
methane) are versatile C1 building blocks due to their ability to undergo condensation reactions with
CH-acidic methyl and methylene moieties. Subsequent modulation of the resulting condensation
products enables the preparation of open-chain products like aldehydes, ketones, enones, enol ethers,
methyl groups, and, most important in alkaloid total synthesis, the annulation of heterocyclic rings
like pyridines, pyridine-N-oxides, bromopyridines, aminopyridines, aminopyrimidines, pyrroles and
chromenones. In certain cases, these reagents can act as alkylating agents. The applications of these
building blocks in natural products total synthesis are reviewed here.
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Affiliation(s)
- Franz Bracher
- Department of Pharmacy, Center for Drug Research, Ludwig-Maximilians University, Munich, Germany
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15
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Saito A, Kogure N, Kitajima M, Takayama H. Total Synthesis of (−)-14-Hydroxygelsenicine and Six Biogenetically Related Gelsemium Alkaloids. Org Lett 2019; 21:7134-7137. [DOI: 10.1021/acs.orglett.9b02703] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Atsushi Saito
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Noriyuki Kogure
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Mariko Kitajima
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Hiromitsu Takayama
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
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16
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Wu X, Yuan X, Yang H, Fu H. Chiral Phosphoric Acid Catalyzed Asymmetric Addition of 2-(Vinyloxy)ethanol to Imines and Applications of the Products. Org Lett 2019; 21:5335-5340. [PMID: 31247765 DOI: 10.1021/acs.orglett.9b01970] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chiral nitrogen-containing molecules such as chiral amines, azetidines, and 2-substituted tetrahydroquinolines are important privileged scaffolds in medicinal chemistry. In this paper, an efficient and highly enantioselective chiral phosphoric acid catalyzed asymmetric addition of 2-(vinyloxy)ethanol to imines has been developed for the first time, providing the corresponding chiral amines containing dioxolane acetals that can transform into useful chiral N-heterocycles including azetidines and 2-substituted tetrahydroquinolines with excellent optical purity.
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Affiliation(s)
- Xudong Wu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Xi Yuan
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Haijun Yang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Hua Fu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry , Tsinghua University , Beijing 100084 , China
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17
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Schroeder R, Grenning AJ. Accessing the decarboxylative allylation–divinylcyclopropane-cycloheptadiene rearrangement from the ketone/aldehyde substrate pool. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.03.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Zhang Z, Xie S, Cheng B, Zhai H, Li Y. Enantioselective Total Synthesis of (+)-Arboridinine. J Am Chem Soc 2019; 141:7147-7154. [DOI: 10.1021/jacs.9b02362] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhen Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Sujun Xie
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Bin Cheng
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Hongbin Zhai
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Shenzhen Engineering Laboratory of Nano Drug Slow-Release, Shenzhen Graduate School of Peking University, Shenzhen 518055, China
| | - Yun Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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19
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Divergent Synthesis of Dihydropyranone Stereoisomers via N‐Heterocyclic Carbene Catalysis. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Xing L, Zhang Y, Li B, Du Y. Synthesis of 4-Chloroisocoumarins via Intramolecular Halolactonization of o-Alkynylbenzoates: PhICl2-Mediated C–O/C–Cl Bond Formation. Org Lett 2019; 21:1989-1993. [DOI: 10.1021/acs.orglett.9b00047] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Linlin Xing
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Yong Zhang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Bing Li
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Yunfei Du
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
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21
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Ghosh A, Carter RG. Recent Syntheses and Strategies toward Polycyclic Gelsemium Alkaloids. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201807509] [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)
- Ankan Ghosh
- Chemistry Department Oregon State University Gilbert Hall Room 153 Corvallis OR 97331 USA
| | - Rich G. Carter
- Chemistry Department Oregon State University Gilbert Hall Room 153 Corvallis OR 97331 USA
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22
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De Paolis M, Reyes Loya D, Maddaluno J. Study toward an Asymmetric and Catalytic Synthesis of Koumine. HETEROCYCLES 2019. [DOI: 10.3987/com-18-s(f)83] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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23
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Guo J, Xu X, Xing Q, Gao Z, Gou J, Yu B. Furfuryl Cation Induced Cascade Formal [3 + 2] Cycloaddition/Double Ring-Opening/Chlorination: An Approach to Chlorine-Containing Complex Triazoles. Org Lett 2018; 20:7410-7414. [PMID: 30412412 DOI: 10.1021/acs.orglett.8b03121] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A TiCl4-promoted cascade formal [3 + 2] cycloaddition/double ring-opening/chlorination of 2-furylcyclobutanols with alkyl or aryl azides is described. This highly efficient transformation involves the formation/cleavage of several C-N, C-Cl, C-C, and C-O bonds in a single operation. It enables the quick construction of trisubstituted 1,2,3-triazoles with an ( E)-enone moiety and a 3-chloropropyl unit. The chlorinated products are readily transformed into other structurally diverse analogues.
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Affiliation(s)
- Jiawei Guo
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
| | - Xiaoming Xu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
| | - Qingzhao Xing
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
| | - Ziwei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
| | - Jing Gou
- Shaanxi Key Laboratory for Advanced Energy Devices , Shaanxi Normal University , Xi'an 710062 , China
| | - Binxun Yu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
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24
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Ghosh A, Carter RG. Recent Syntheses and Strategies toward Polycyclic Gelsemium Alkaloids. Angew Chem Int Ed Engl 2018; 58:681-694. [PMID: 30378226 DOI: 10.1002/anie.201807509] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Indexed: 01/13/2023]
Abstract
This Minireview is focused on an in-depth discussion of comparative strategies to construct the gelsemine and gelsedine classes of the gelsemium alkaloids. This document highlights the diversity of strategies used to access specific motifs found within these targets: a) the fused "[3.2.1]bicycle" (in gelsemine) and "oxabicycle" (in gelsedine class); b) the "piroxindole" moiety with C7 quaternary center; c) the "N-heterocycles" and d) the "THP" moiety with C20 quaternary center (in gelsemine).
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Affiliation(s)
- Ankan Ghosh
- Chemistry Department, Oregon State University, Gilbert Hall Room 153, Corvallis, OR, 97331, USA
| | - Rich G Carter
- Chemistry Department, Oregon State University, Gilbert Hall Room 153, Corvallis, OR, 97331, USA
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25
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Schmid SC, Guzei IA, Fernández I, Schomaker JM. Ring Expansion of Bicyclic Methyleneaziridines via Concerted, Near-Barrierless [2,3]-Stevens Rearrangements of Aziridinium Ylides. ACS Catal 2018; 8:7907-7914. [PMID: 30294503 PMCID: PMC6173328 DOI: 10.1021/acscatal.8b02206] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of densely functionalized azetidinesin a highly stereocontrolled manner is challenging, but interest in the bioactivities of these small heterocycles has stimulated methods for their preparation. We recently reported a one-carbon ring expansion of bicyclic methylene aziridines under dirhodium catalysis capable of delivering enantioenriched azetidines. This work explores this ring expansion using computational and experimental studies. DFT computations indicate that the reaction proceeds through formation of an aziridinium ylide, which is precisely poised for concerted, asynchronous ring-opening/closing to deliver the azetidines in a [2,3]-Stevens-type rearrangement. The concerted nature of this rearrangement is responsible for the stereospecificity of the reaction, where axial chirality from the initial allene substrate is transferred to the azetidine product with complete fidelity. The computed mechanistic pathway highlights the key roles of the olefin and the rigid structure of the methylene aziridine in differentiating our observed ring expansion from competing cheletropic elimination pathways noted with ylides derived from typical aziridines.
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Affiliation(s)
- Steven C. Schmid
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
| | - Ilia A. Guzei
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
| | - Israel Fernández
- Departamento de Química Organica I and Centro de Innovacioń en Química Avazanda (ORFEO−CINQA), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Jennifer M. Schomaker
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
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26
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Wang P, Gao Y, Ma D. Divergent Entry to Gelsedine-Type Alkaloids: Total Syntheses of (−)-Gelsedilam, (−)-Gelsenicine, (−)-Gelsedine, and (−)-Gelsemoxonine. J Am Chem Soc 2018; 140:11608-11612. [DOI: 10.1021/jacs.8b08127] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Pingluan Wang
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Yang Gao
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Dawei Ma
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
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27
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Yang H, Guo J, Gao Z, Gou J, Yu B. A Combination of Furfuryl Cation Induced Three-Component Reactions and Photocatalyst-Free Photoisomerization To Construct Complex Triazoles. Org Lett 2018; 20:4893-4897. [DOI: 10.1021/acs.orglett.8b02035] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Hengtuo Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical, Shaanxi Normal University, Xi’an 710062, China
| | - Jiawei Guo
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical, Shaanxi Normal University, Xi’an 710062, China
| | - Ziwei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical, Shaanxi Normal University, Xi’an 710062, China
| | - Jing Gou
- Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Normal University, Xi’an 710062, China
| | - Binxun Yu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical, Shaanxi Normal University, Xi’an 710062, China
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28
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Li NP, Liu M, Huang XJ, Gong XY, Zhang W, Cheng MJ, Ye WC, Wang L. Gelsecorydines A-E, Five Gelsedine-Corynanthe-Type Bisindole Alkaloids from the Fruits of Gelsemium elegans. J Org Chem 2018; 83:5707-5714. [PMID: 29719959 DOI: 10.1021/acs.joc.8b00736] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Five monoterpenoid bisindole alkaloids with new carbon skeletons, gelsecorydines A-E (1-5), together with their biogenetic precursors were isolated from the fruits of Gelsemium elegans. Compounds 1-5 represent the first examples of heterodimeric frameworks composed of a gelsedine-type alkaloid and a modified corynanthe-type one. Notably, compound 2 featured an unprecedented caged skeleton with a 6/5/7/6/5/6 heterohexacyclic ring system, which possessed a pyridine ring that linked the two monomers. Their structures and absolute configurations were elucidated by spectroscopic analysis, X-ray diffraction, and electronic circular dichroism (ECD) calculation. A plausible biosynthetic pathway for compounds 1-5 is proposed. Compounds 1, 3, 4, and 5 exhibited a significant inhibitory effect against nitric oxide (NO) production in macrophages.
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Affiliation(s)
- Ni-Ping Li
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Miao Liu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Xiao-Jun Huang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Xue-Ying Gong
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Wei Zhang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Min-Jing Cheng
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Lei Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
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29
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Shimokawa J. Natural Product Synthesis as a Source of Inspiration and Discovery. J SYN ORG CHEM JPN 2018. [DOI: 10.5059/yukigoseikyokaishi.76.458] [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)
- Jun Shimokawa
- Department of Chemistry, Graduate School of Science, Kyoto University
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30
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Guchhait SK, Sisodiya S, Saini M, Shah YV, Kumar G, Daniel DP, Hura N, Chaudhary V. Synthesis of Polyfunctionalized Pyrroles via a Tandem Reaction of Michael Addition and Intramolecular Cyanide-Mediated Nitrile-to-Nitrile Condensation. J Org Chem 2018; 83:5807-5815. [DOI: 10.1021/acs.joc.8b00465] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Sankar K. Guchhait
- Department of Medicinal Chemistry, National Institute of Pharmaceutical and Education Research (NIPER), Sector 67, SAS Nagar, Mohali, Punjab 160062, India
| | - Shailendra Sisodiya
- Department of Medicinal Chemistry, National Institute of Pharmaceutical and Education Research (NIPER), Sector 67, SAS Nagar, Mohali, Punjab 160062, India
| | - Meenu Saini
- Department of Medicinal Chemistry, National Institute of Pharmaceutical and Education Research (NIPER), Sector 67, SAS Nagar, Mohali, Punjab 160062, India
| | - Yesha V. Shah
- Department of Medicinal Chemistry, National Institute of Pharmaceutical and Education Research (NIPER), Sector 67, SAS Nagar, Mohali, Punjab 160062, India
| | - Gulshan Kumar
- Department of Medicinal Chemistry, National Institute of Pharmaceutical and Education Research (NIPER), Sector 67, SAS Nagar, Mohali, Punjab 160062, India
| | - Divine P Daniel
- Department of Medicinal Chemistry, National Institute of Pharmaceutical and Education Research (NIPER), Sector 67, SAS Nagar, Mohali, Punjab 160062, India
| | - Neha Hura
- Department of Medicinal Chemistry, National Institute of Pharmaceutical and Education Research (NIPER), Sector 67, SAS Nagar, Mohali, Punjab 160062, India
| | - Vikas Chaudhary
- Department of Medicinal Chemistry, National Institute of Pharmaceutical and Education Research (NIPER), Sector 67, SAS Nagar, Mohali, Punjab 160062, India
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31
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Affiliation(s)
- Lei Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Zhuang Chen
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Xiwu Zhang
- 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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32
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Shimokawa J. Synthetic Studies on Heteropolycyclic Natural Products: Development of Divergent Strategy. Chem Pharm Bull (Tokyo) 2018; 66:105-115. [DOI: 10.1248/cpb.c17-00819] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Jun Shimokawa
- Graduate School of Pharmaceutical Sciences, Nagoya University
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33
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Reidl TW, Son J, Wink DJ, Anderson LL. Facile Synthesis of Azetidine Nitrones and Diastereoselective Conversion into Densely Substituted Azetidines. Angew Chem Int Ed Engl 2017; 56:11579-11583. [PMID: 28707372 DOI: 10.1002/anie.201705681] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Revised: 07/12/2017] [Indexed: 11/06/2022]
Abstract
An electrocyclization route to azetidine nitrones from N-alkenylnitrones was discovered that provides facile access to these unsaturated strained heterocycles. Reactivity studies showed that these compounds undergo a variety of reduction, cycloaddition, and nucleophilic addition reactions to form highly substituted azetidines with excellent diastereoselectivity. Taken together, these transformations provide a fundamentally different approach to azetidine synthesis than traditional cyclization by nucleophilic displacement and provide novel access to a variety of underexplored strained heterocyclic compounds.
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Affiliation(s)
- Tyler W Reidl
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL, USA
| | - Jongwoo Son
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL, USA
| | - Donald J Wink
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL, USA
| | - Laura L Anderson
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL, USA
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34
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Reidl TW, Son J, Wink DJ, Anderson LL. Facile Synthesis of Azetidine Nitrones and Diastereoselective Conversion into Densely Substituted Azetidines. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705681] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Tyler W. Reidl
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St. Chicago IL USA
| | - Jongwoo Son
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St. Chicago IL USA
| | - Donald J. Wink
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St. Chicago IL USA
| | - Laura L. Anderson
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St. Chicago IL USA
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35
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Tanaka S, Honmura Y, Uesugi S, Fukushi E, Tanaka K, Maeda H, Kimura KI, Nehira T, Hashimoto M. Cyclohelminthol X, a Hexa-Substituted Spirocyclopropane from Helminthosporium velutinum yone96: Structural Elucidation, Electronic Circular Dichroism Analysis, and Biological Properties. J Org Chem 2017; 82:5574-5582. [PMID: 28467078 DOI: 10.1021/acs.joc.7b00393] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Helminthosporium velutinum yone96 produces cyclohelminthol X (1), a unique hexa-substituted spirocyclopropane. Although its molecular formula and NMR spectral data resemble those of AD0157, being isolated from marine fungus Paraconiothyrium sp. HL-78-gCHSP3-B005, our detailed analyses disclosed a totally different structure. Chemical shift calculations and electronic circular dichroism spectral calculations were quite helpful to establish the structure, when those were performed based on density functional theory. The carbon framework of cyclohelminthols I-IV is found at the C1-C8 propenylcyclopentene substructure of 1. Thus, 1 is assumed to be biosynthesized by cyclopropanation between an oxidized form of cyclohelminthol IV and a succinic anhydride derivative 4. Cytotoxicity for two cancer cell lines and proteasome inhibition efficiency are measured.
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Affiliation(s)
- Shizuya Tanaka
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Yuna Honmura
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Shota Uesugi
- The United Graduate School of Agricultural Sciences, Iwate University , Morioka 020-8550, Japan
| | - Eri Fukushi
- Graduate School of Agriculture, Hokkaido University , Sapporo 060-8589, Japan
| | - Kazuaki Tanaka
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Hayato Maeda
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University , Morioka 020-8550, Japan
| | - Tatsuo Nehira
- Graduate School of Integrated Arts and Sciences, Hiroshima University , 1-7-1, Kagamiyama, Higashi-Hiroshima 739-8521, Japan
| | - Masaru Hashimoto
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
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36
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Li Y, Li J, Ding H, Li A. Recent advances on the total synthesis of alkaloids in mainland China. Natl Sci Rev 2017. [DOI: 10.1093/nsr/nwx050] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
AbstractAlkaloids are a large family of natural products that mostly contain basic nitrogen atoms. Because of their intriguing structures and important functions, they have long been popular targets for synthetic organic chemists. China's chemists have made significant progress in the area of alkaloid synthesis over past decades. In this article, selected total syntheses of alkaloids from research groups in mainland China during the period 2011–16 are highlighted.
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Affiliation(s)
- Yong Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative Innovation Center of Chemistry for Life Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China
| | - Jian Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative Innovation Center of Chemistry for Life Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Hanfeng Ding
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Ang Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative Innovation Center of Chemistry for Life Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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37
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Guo JT, Zhang BQ, Luo Y, Guan Z, He YH. Highly Enantioselective Synthesis of ( R
)-3-Alkyl-3-hydroxyindolin-2-ones Including Natural Product ( R
)-Convolutamydine A Catalyzed by A Primary Amine. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jun-Tao Guo
- Key Laboratory of Applied Chemistry of Chongqing Municipality; School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 P. R. China
| | - Bao-Qiang Zhang
- Key Laboratory of Applied Chemistry of Chongqing Municipality; School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 P. R. China
| | - Yuan Luo
- Key Laboratory of Applied Chemistry of Chongqing Municipality; School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 P. R. China
| | - Zhi Guan
- Key Laboratory of Applied Chemistry of Chongqing Municipality; School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 P. R. China
| | - Yan-Hong He
- Key Laboratory of Applied Chemistry of Chongqing Municipality; School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 P. R. China
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38
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Plutschack MB, Seeberger PH, Gilmore K. Visible-Light-Mediated Achmatowicz Rearrangement. Org Lett 2016; 19:30-33. [DOI: 10.1021/acs.orglett.6b03237] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Matthew B. Plutschack
- Department
of Biomolecular Systems, Max-Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Peter H. Seeberger
- Department
of Biomolecular Systems, Max-Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
- Institute
of Chemistry and Biochemistry, Department of Biology, Chemistry and
Pharmacy, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Kerry Gilmore
- Department
of Biomolecular Systems, Max-Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
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Ghosh AK, Brindisi M. Achmatowicz Reaction and its Application in the Syntheses of Bioactive Molecules. RSC Adv 2016; 6:111564-111598. [PMID: 28944049 PMCID: PMC5603243 DOI: 10.1039/c6ra22611f] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Substituted pyranones and tetrahydropyrans are structural subunits of many bioactive natural products. Considerable efforts are devoted toward the chemical synthesis of these natural products due to their therapeutic potential as well as low natural abundance. These embedded pyranones and tetrahydropyran structural motifs have been the subject of synthetic interest over the years. While there are methods available for the syntheses of these subunits, there are issues related to regio and stereochemical outcomes, as well as versatility and compatibility of reaction conditions and functional group tolerance. The Achmatowicz reaction, an oxidative ring enlargement of furyl alcohol, was developed in the 1970s. The reaction provides a unique entry to a variety of pyranone derivatives from functionalized furanyl alcohols. These pyranones provide convenient access to substituted tetrahydropyran derivatives. This review outlines general approaches to the synthesis of tetrahydropyrans, covering general mechanistic aspects of the Achmatowicz reaction or rearrangement with an overview of the reagents utilized for the Achmatowicz reaction. The review then focuses on the synthesis of functionalized tetrahydropyrans and pyranones and their applications in the synthesis of natural products and medicinal agents.
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Affiliation(s)
- Arun K. Ghosh
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Margherita Brindisi
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, West Lafayette, IN 47907, USA
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40
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Huang YM, Liu Y, Zheng CW, Jin QW, Pan L, Pan RM, Liu J, Zhao G. Total Synthesis of Gelsedilam by Means of a Thiol-Mediated Diastereoselective Conjugate Addition-Aldol Reaction. Chemistry 2016; 22:18339-18342. [DOI: 10.1002/chem.201604620] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Indexed: 11/10/2022]
Affiliation(s)
- You-Ming Huang
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Yang Liu
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Chang-Wu Zheng
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Qiao-Wen Jin
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Lu Pan
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Ren-Ming Pan
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Jun Liu
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Gang Zhao
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
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41
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Synthetic utility of iodic acid in the oxidation of benzylic alcohols to aromatic aldehydes and ketones. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.09.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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42
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Pancholi AK, Geden JV, Clarkson GJ, Shipman M. Asymmetric Synthesis of 2-Substituted Azetidin-3-ones via Metalated SAMP/RAMP Hydrazones. J Org Chem 2016; 81:7984-92. [PMID: 27447363 DOI: 10.1021/acs.joc.6b01284] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
2-Substituted azetidin-3-ones can be prepared in good yields and enantioselectivities (up to 85% ee) by a one-pot procedure involving the metalation of the SAMP/RAMP hydrazones of N-Boc-azetidin-3-one, reaction with a wide range of electrophiles, including alkyl, allyl, and benzyl halides and carbonyl compounds, followed by hydrolysis using oxalic acid.
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Affiliation(s)
- Alpa K Pancholi
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Joanna V Geden
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Guy J Clarkson
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Michael Shipman
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
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43
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Harada T, Shimokawa J, Fukuyama T. Unified Total Synthesis of Five Gelsedine-Type Alkaloids: (−)-Gelsenicine, (−)-Gelsedine, (−)-Gelsedilam, (−)-14-Hydroxygelsenicine, and (−)-14,15-Dihydroxygelsenicine. Org Lett 2016; 18:4622-5. [DOI: 10.1021/acs.orglett.6b02263] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takaaki Harada
- Graduate
School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Jun Shimokawa
- Graduate
School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8601, Japan
| | - Tohru Fukuyama
- Graduate
School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8601, Japan
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44
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Li Z, Tong R. Catalytic Environmentally Friendly Protocol for Achmatowicz Rearrangement. J Org Chem 2016; 81:4847-55. [DOI: 10.1021/acs.joc.6b00469] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhilong Li
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Rongbiao Tong
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
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45
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Abstract
The total synthesis of (-)-cardiopetaline, an aconitine-type natural product, has been accomplished. Our synthesis involved a Wagner-Meerwein rearrangement of a sulfonyloxirane that enabled, in a single step, the construction of the bicyclo[3.2.1] system in the aconitine skeleton and effective introduction of oxygen functional groups at the appropriate positions.
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Affiliation(s)
- Yoshitake Nishiyama
- Graduate School of Pharmaceutical Sciences, Nagoya University , Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.,Graduate School of Pharmaceutical Sciences, University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Satoshi Yokoshima
- Graduate School of Pharmaceutical Sciences, Nagoya University , Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Tohru Fukuyama
- Graduate School of Pharmaceutical Sciences, Nagoya University , Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
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46
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Mailyan AK, Eickhoff JA, Minakova AS, Gu Z, Lu P, Zakarian A. Cutting-Edge and Time-Honored Strategies for Stereoselective Construction of C–N Bonds in Total Synthesis. Chem Rev 2016; 116:4441-557. [DOI: 10.1021/acs.chemrev.5b00712] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Artur K. Mailyan
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - John A. Eickhoff
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Anastasiia S. Minakova
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Zhenhua Gu
- Department
of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Ping Lu
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Armen Zakarian
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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47
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Newcomb ET, Knutson PC, Pedersen BA, Ferreira EM. Total Synthesis of Gelsenicine via a Catalyzed Cycloisomerization Strategy. J Am Chem Soc 2015; 138:108-11. [PMID: 26716762 DOI: 10.1021/jacs.5b12263] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first total synthesis of (±)-gelsenicine is reported. The synthetic route is highly efficient (13 steps), featuring (1) a pivotal metal-catalyzed isomerization/rearrangement process that forges the central core of the molecule and (2) two facile C-N bond-forming steps that establish the flanking heterocycles.
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Affiliation(s)
- Eric T Newcomb
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
| | - Phil C Knutson
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
| | - Blaine A Pedersen
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
| | - Eric M Ferreira
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
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48
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Hager A, Vrielink N, Hager D, Lefranc J, Trauner D. Synthetic approaches towards alkaloids bearing α-tertiary amines. Nat Prod Rep 2015; 33:491-522. [PMID: 26621771 DOI: 10.1039/c5np00096c] [Citation(s) in RCA: 140] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Alkaloids account for some of the most beautiful and biologically active natural products. Although they are usually classified along biosynthetic criteria, they can also be categorized according to certain structural motifs. Amongst these, the α-tertiary amine (ATA), i.e. a tetrasubstituted carbon atom surrounded by three carbons and one nitrogen, is particularly interesting. A limited number of methods have been described to access this functional group and fewer still are commonly used in synthesis. Herein, we review some approaches to asymmetrically access ATAs and provide an overview of alkaloid total syntheses where those have been employed.
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Affiliation(s)
- Anastasia Hager
- Fakultät für Chemie und Pharmazie, Ludwig-Maximilians-Universität München, and Munich Center for Integrated Protein Science, Butenandtstr. 5 - 13, 81377 München, Germany.
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49
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Zhao C, Li F, Wang J. N-Heterocyclic Carbene Catalyzed Dynamic Kinetic Resolution of Pyranones. Angew Chem Int Ed Engl 2015; 55:1820-4. [PMID: 26546390 DOI: 10.1002/anie.201508205] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 10/13/2015] [Indexed: 11/06/2022]
Abstract
The dynamic kinetic resolution of 6-hydroxypyranones with enals or alkynals through an asymmetric redox esterification is catalyzed by a chiral N-heterocyclic carbene. The resulting esters are obtained in good to high yields and with high levels of enantio- and diastereocontrol. The reaction products are further derivatized to obtain functionalized sugar derivatives and natural products.
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Affiliation(s)
- Changgui Zhao
- Department of Pharmacology and Pharmaceutical Sciences, School of Medicine, Tsinghua University, Beijing, 100084, China.,Tsinghua-Peking Centre for Life Sciences, Beijing, 100084, China
| | - Fangyi Li
- Department of Pharmacology and Pharmaceutical Sciences, School of Medicine, Tsinghua University, Beijing, 100084, China
| | - Jian Wang
- Department of Pharmacology and Pharmaceutical Sciences, School of Medicine, Tsinghua University, Beijing, 100084, China. .,Tsinghua-Peking Centre for Life Sciences, Beijing, 100084, China.
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50
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Zhao C, Li F, Wang J. N-Heterocyclic Carbene Catalyzed Dynamic Kinetic Resolution of Pyranones. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508205] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Changgui Zhao
- Department of Pharmacology and Pharmaceutical Sciences; School of Medicine; Tsinghua University; Beijing 100084 China
- Tsinghua-Peking Centre for Life Sciences; Beijing 100084 China
| | - Fangyi Li
- Department of Pharmacology and Pharmaceutical Sciences; School of Medicine; Tsinghua University; Beijing 100084 China
| | - Jian Wang
- Department of Pharmacology and Pharmaceutical Sciences; School of Medicine; Tsinghua University; Beijing 100084 China
- Tsinghua-Peking Centre for Life Sciences; Beijing 100084 China
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