1
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Jia J, Luo J, Li W, Cui F, Pan Y, Tang H. Copper-Metallized Porous N-Heterocyclic Carbene Ligand Polymer-Catalyzed Regio- and Stereoselective 1,2-Carboboration of Alkynes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2308238. [PMID: 38064182 PMCID: PMC10870022 DOI: 10.1002/advs.202308238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Indexed: 02/17/2024]
Abstract
Alkenylboronates are highly versatile building blocks and valuable reagents in the synthesis of complex molecules. Compared with that of monosubstituted alkenylboronates, the synthesis of multisubstituted alkenylboronates is challenging. The copper-catalyzed carboboration of alkynes is an operationally simple and straightforward method for synthesizing bis/trisubstituted alkenylboronates. In this work, a series of copper-metallized N-Heterocyclic Carbene (NHC) ligand porous polymer catalysts are designed and synthesized in accordance with the mechanism of carboboration. By using CuCl@POL-NHC-Ph as the optimal nanocatalyst, this study realizes the β-regio- and stereoselective (syn-addition) 1,2-carboboration of alkynes (regioselectivity up to >99:1) with satisfactory yields and a wide range of substrates. This work not only overcomes the selectivity of carboboration but also provides a new strategy for the design of nanocatalysts and their application in organic synthesis.
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Affiliation(s)
- Jun‐Song Jia
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal ResourcesSchool of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin541004P. R. China
| | - Jin‐Rong Luo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal ResourcesSchool of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin541004P. R. China
| | - Wen‐Hao Li
- Department of ChemistryTsinghua UniversityBeijing100084P. R. China
| | - Fei‐Hu Cui
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal ResourcesSchool of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin541004P. R. China
| | - Ying‐Ming Pan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal ResourcesSchool of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin541004P. R. China
| | - Hai‐Tao Tang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal ResourcesSchool of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin541004P. R. China
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2
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Reid JP, Betinol IO, Kuang Y. Mechanism to model: a physical organic chemistry approach to reaction prediction. Chem Commun (Camb) 2023; 59:10711-10721. [PMID: 37552047 DOI: 10.1039/d3cc03229a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
The application of mechanistic generalizations is at the core of chemical reaction development and application. These strategies are rooted in physical organic chemistry where mechanistic understandings can be derived from one reaction and applied to explain another. Over time these techniques have evolved from rationalizing observed outcomes to leading experimental design through reaction prediction. In parallel, significant progression in asymmetric organocatalysis has expanded the reach of chiral transfer to new reactions with increased efficiency. However, the complex and diverse catalyst structures applied in this arena have rendered the generalization of asymmetric catalytic processes to be exceptionally challenging. Recognizing this, a portion of our research has been focused on understanding the transferability of chemical observations between similar reactions and exploiting this phenomenon as a platform for prediction. Through these experiences, we have relied on a working knowledge of reaction mechanism to guide the development and application of our models which have been advanced from simple qualitative rules to large statistical models for quantitative predictions. In this feature article, we describe the models acquired to generalize organocatalytic reaction mechanisms and demonstrate their use as a powerful approach for accelerating enantioselective synthesis.
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Affiliation(s)
- Jolene P Reid
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, V6T 1Z1, Canada.
| | - Isaiah O Betinol
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, V6T 1Z1, Canada.
| | - Yutao Kuang
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, V6T 1Z1, Canada.
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3
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Saunthwal RK, Mortimer J, Orr-Ewing AJ, Clayden J. Enantioselective one-carbon expansion of aromatic rings by simultaneous formation and chromoselective irradiation of a transient coloured enolate. Chem Sci 2022; 13:2079-2085. [PMID: 35308841 PMCID: PMC8848985 DOI: 10.1039/d1sc06684f] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 01/25/2022] [Indexed: 12/14/2022] Open
Abstract
Enantioenriched seven-membered carbocycles are motifs in many molecules of structural and biological interest. We report a simple, practical, transition metal-free and mechanistically unusual method for the enantioselective synthesis of substituted cycloheptatrienes. By forming a coloured enolate with an appropriate absorption band and selectively irradiating in situ, we to initiate a tandem, asymmetric anionic and photochemical ring expansion of readily accessible N-benzylbenzamides. The cascade of reactions leading to the products entails enantioselective benzylic deprotonation with a chiral lithium amide, dearomatizing cyclization of the resulting configurationally defined organolithium to give an extended amide enolate, and photochemically induced formal [1,7]-sigmatropic rearrangement and 6π-electrocyclic ring-opening - the latter all evidently being stereospecific - to deliver enantioenriched cycloheptatrienes with embedded benzylic stereocentres.
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Affiliation(s)
- Rakesh K Saunthwal
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - James Mortimer
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Andrew J Orr-Ewing
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Jonathan Clayden
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
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4
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Jamshaid S, Lee YR. Lewis-Acid-Catalyzed Regioselective Construction of Diversely Functionalized Polycyclic Fused Furans. Org Lett 2022; 24:1351-1356. [PMID: 35118858 DOI: 10.1021/acs.orglett.2c00019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel, facile, and efficient Lewis-acid-catalyzed [4 + 1] annulation protocol for the construction of functionalized polycyclic-fused furans is developed. This methodology is free of transition metals and ligands and provides a rapid synthetic route to divergently orientated polycyclic furans in good yields. In addition, this protocol can also be used to synthesize multisubstituted furans.
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Affiliation(s)
- Sana Jamshaid
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
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5
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Betinol IO, Kuang Y, Reid JP. Guiding Target Synthesis with Statistical Modeling Tools: A Case Study in Organocatalysis. Org Lett 2022; 24:1429-1433. [PMID: 35030005 DOI: 10.1021/acs.orglett.1c04134] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Practitioners are generally not willing to explore modern reactions where considerable synthetic effort is required to generate materials and the results are not certain. Organocatalysis exemplifies this, in which a broad set of enantioselective reactions have been successfully developed but further applications to include additional substrates are often not performed. Herein we demonstrate how statistical models can be utilized to accurately distinguish between different catalysts and reactions to guide the selection of efficient synthetic routes to obtain a target molecule.
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Affiliation(s)
- Isaiah O Betinol
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Yutao Kuang
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Jolene P Reid
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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6
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Lussari N, Khan A, Pilli RA, Dos Santos AA, Silva LF, Braga AAC. A DFT study on the formation of heterocycles via iodine( iii)-promoted ring expansion reactions. NEW J CHEM 2022. [DOI: 10.1039/d2nj04393a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Combined computational–experimental study to elucidate the mechanism of HTIB-promoted ring expansion reaction of bicyclic heterocycles bearing an exocyclic double bond.
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Affiliation(s)
- Natália Lussari
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP CEP 05508-000, Brazil
| | - Ajmir Khan
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP CEP 05508-000, Brazil
- School of Packaging, Michigan State University, 448 Wilson Road, East Lansing, MI 48824-1223, USA
| | - Ronaldo A. Pilli
- Institute of Chemistry, University of Campinas, 13083-970 Campinas, SP, Brazil
| | - Alcindo A. Dos Santos
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP CEP 05508-000, Brazil
| | - Luiz F. Silva
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP CEP 05508-000, Brazil
| | - Ataualpa A. C. Braga
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP CEP 05508-000, Brazil
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7
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Sobhani M, Frey A, Rettmann A, Thom R, Villinger A, Ehlers P, Langer P. Synthesis of Dibenzotropones by Alkyne-Carbonyl Metathesis. J Org Chem 2021; 86:14420-14432. [PMID: 34708654 DOI: 10.1021/acs.joc.1c01132] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Dibenzocycloheptanones (dibenzotropones) were prepared by Brønsted acid mediated intramolecular alkyne-carbonyl metathesis (ACM) reactions. The cyclization precursors are readily available by Sonogashira reaction of 2-bromobenzoyl chloride with terminal alkynes, followed by Suzuki reactions with benzaldehydes. The ACM reactions are highly modular and atom economic and allow for the construction of two regioisomeric series of dibenzotropones.
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Affiliation(s)
- Maryam Sobhani
- Universität Rostock, Institut für Chemie, A.-Einstein-Str.3a, 18059 Rostock, Germany
| | - Anna Frey
- Universität Rostock, Institut für Chemie, A.-Einstein-Str.3a, 18059 Rostock, Germany
| | - Andre Rettmann
- Universität Rostock, Institut für Chemie, A.-Einstein-Str.3a, 18059 Rostock, Germany
| | - Richard Thom
- Universität Rostock, Institut für Chemie, A.-Einstein-Str.3a, 18059 Rostock, Germany
| | - Alexander Villinger
- Universität Rostock, Institut für Chemie, A.-Einstein-Str.3a, 18059 Rostock, Germany
| | - Peter Ehlers
- Universität Rostock, Institut für Chemie, A.-Einstein-Str.3a, 18059 Rostock, Germany.,Leibniz Institut für Katalyse an der Universität Rostock, A.-Einstein-Str.29a, 18059 Rostock, Germany
| | - Peter Langer
- Universität Rostock, Institut für Chemie, A.-Einstein-Str.3a, 18059 Rostock, Germany.,Leibniz Institut für Katalyse an der Universität Rostock, A.-Einstein-Str.29a, 18059 Rostock, Germany
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8
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Khan A, Silva LF, Rabnawaz M. Iodine(III)‐Promoted Ring Expansion Reactions: A Metal‐Free Approach toward Seven‐Membered Heterocyclic Rings. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100497] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ajmir Khan
- School of Packaging Michigan State University 448 Wilson Road East Lansing MI 48824-1223 USA
- Department of Fundamental Chemistry Institute of Chemistry University of São Paulo Av. Prof. Lineu Prestes, 748 São Paulo SP CEP 05508-000 Brazil
| | - Luiz F. Silva
- Department of Fundamental Chemistry Institute of Chemistry University of São Paulo Av. Prof. Lineu Prestes, 748 São Paulo SP CEP 05508-000 Brazil
| | - Muhammad Rabnawaz
- School of Packaging Michigan State University 448 Wilson Road East Lansing MI 48824-1223 USA
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9
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Teimouri MB, Yousefi S, Meydani A. One-pot three-component synthesis of a new series of tetrahydrobenzofuran-chromone conjugates. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1918169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
| | | | - Ali Meydani
- Faculty of Chemistry, Kharazmi University, Tehran, Iran
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10
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Maezono SMB, Khanal HD, Chaudhary P, Devkota S, Lee YR. Construction of Diverse Dihydrodibenzofuranones by Migration/Intramolecular Arylation of Iodonium Ylides. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Hari Datta Khanal
- School of Chemical Engineering Yeungnam University Gyeongsan 712‐749 Republic of Korea
| | - Priyanka Chaudhary
- School of Chemical Engineering Yeungnam University Gyeongsan 712‐749 Republic of Korea
| | - Shreedhar Devkota
- School of Chemical Engineering Yeungnam University Gyeongsan 712‐749 Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering Yeungnam University Gyeongsan 712‐749 Republic of Korea
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11
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Schwan J, Kleoff M, Heretsch P, Christmann M. Five-Step Synthesis of Yaequinolones J1 and J2. Org Lett 2020; 22:675-678. [PMID: 31909626 DOI: 10.1021/acs.orglett.9b04455] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A concise synthesis of yaequinolones J1 and J2 is reported. The route is based on the aryne insertion into the σ-C-N bond of an unsymmetric imide followed by a diastereoselective aldol cyclization of the resulting N-acylated aminobenzophenone. The chromene motif is generated in the first step by an organocatalytic tandem Knoevenagel electrocyclization of citral and 2-bromoresorcinol. The approach adheres to the ideality principle, using almost exclusively strategic bond-forming reactions.
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Affiliation(s)
- Johannes Schwan
- Institut für Chemie und Biochemie , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Merlin Kleoff
- Institut für Chemie und Biochemie , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Philipp Heretsch
- Institut für Chemie und Biochemie , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Mathias Christmann
- Institut für Chemie und Biochemie , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
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12
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Wang Z. Construction of all-carbon quaternary stereocenters by catalytic asymmetric conjugate addition to cyclic enones in natural product synthesis. Org Chem Front 2020. [DOI: 10.1039/d0qo00763c] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review discusses the construction of all-carbon quaternary stereocenters using catalytic asymmetric conjugate addition and its application in natural product synthesis.
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Affiliation(s)
- Zhuo Wang
- Southern University of Science and Technology
- School of Medicine
- Shenzhen
- People's Republic of China
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13
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Wang Z. Advances in the Asymmetric Total Synthesis of Natural Products Using Chiral Secondary Amine Catalyzed Reactions of α,β-Unsaturated Aldehydes. Molecules 2019; 24:E3412. [PMID: 31546876 PMCID: PMC6767148 DOI: 10.3390/molecules24183412] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/14/2019] [Accepted: 09/19/2019] [Indexed: 11/16/2022] Open
Abstract
Chirality is one of the most important attributes for its presence in a vast majority of bioactive natural products and pharmaceuticals. Asymmetric organocatalysis methods have emerged as a powerful methodology for the construction of highly enantioenriched structural skeletons of the target molecules. Due to their extensive application of organocatalysis in the total synthesis of bioactive molecules and some of them have been used in the industrial synthesis of drugs have attracted increasing interests from chemists. Among the chiral organocatalysts, chiral secondary amines (MacMillan's catalyst and Jorgensen's catalyst) have been especially considered attractive strategies because of their impressive efficiency. Herein, we outline advances in the asymmetric total synthesis of natural products and relevant drugs by using the strategy of chiral secondary amine catalyzed reactions of α,β-unsaturated aldehydes in the last eighteen years.
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Affiliation(s)
- Zhonglei Wang
- School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, China.
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China.
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14
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Chen H, Zhao S, Cheng S, Dai X, Xu X, Yuan W, Zhang X. Synthesis of Novel Pterocarpen Analogues
via
[3 + 2] Coupling‐Elimination Cascade of α,α‐Dicyanoolefins with Quinone Monoimines. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3543] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hui Chen
- Key Laboratory for Asymmetric Synthesis and Chirotechnology of Sichuan ProvinceChengdu Institute of Organic Chemistry, Chinese Academy of Sciences Chengdu 610041 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Sihan Zhao
- Key Laboratory for Asymmetric Synthesis and Chirotechnology of Sichuan ProvinceChengdu Institute of Organic Chemistry, Chinese Academy of Sciences Chengdu 610041 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Shaobing Cheng
- Key Laboratory for Asymmetric Synthesis and Chirotechnology of Sichuan ProvinceChengdu Institute of Organic Chemistry, Chinese Academy of Sciences Chengdu 610041 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Xingjie Dai
- Key Laboratory for Asymmetric Synthesis and Chirotechnology of Sichuan ProvinceChengdu Institute of Organic Chemistry, Chinese Academy of Sciences Chengdu 610041 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Xiaoying Xu
- Key Laboratory for Asymmetric Synthesis and Chirotechnology of Sichuan ProvinceChengdu Institute of Organic Chemistry, Chinese Academy of Sciences Chengdu 610041 China
| | - Weicheng Yuan
- Key Laboratory for Asymmetric Synthesis and Chirotechnology of Sichuan ProvinceChengdu Institute of Organic Chemistry, Chinese Academy of Sciences Chengdu 610041 China
| | - Xiaomei Zhang
- Key Laboratory for Asymmetric Synthesis and Chirotechnology of Sichuan ProvinceChengdu Institute of Organic Chemistry, Chinese Academy of Sciences Chengdu 610041 China
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15
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Otawa Y, Mori K. Construction of seven- and eight-membered carbocycles by Lewis acid catalyzed C(sp3)–H bond functionalization. Chem Commun (Camb) 2019; 55:13856-13859. [DOI: 10.1039/c9cc08074k] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Concise construction of seven- or eight-membered carbocycles was accomplished by Lewis acid catalyzed C(sp3)–H bond functionalization.
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Affiliation(s)
- Yuna Otawa
- Department of Applied Chemistry
- Graduate School of Engineering
- Tokyo University of Agriculture and Technology
- Tokyo 184-8588
- Japan
| | - Keiji Mori
- Department of Applied Chemistry
- Graduate School of Engineering
- Tokyo University of Agriculture and Technology
- Tokyo 184-8588
- Japan
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16
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Abstract
The field of natural product total synthesis has reached the point where synthetic efficiency has become more important than merely defining a viable (yet less ideal) route to the target molecule. Synthetic efficiency is best represented by the number of steps it takes to finish the target molecule from readily available starting materials, as by reducing the number of steps, all other factors of synthetic efficiency are influenced positively. By comparing several total syntheses from the recent years, the most successful strategies for step efficient syntheses will be highlighted. Each synthesis will be presented using a color-coded synthetic flowchart, in which each step is categorized by a colored box. Five categories of transformations are defined and rated according to their synthetic value. Each class will be signified by different colors so that the reader can quickly see which parts of the synthesis are productive and those that are not.
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Affiliation(s)
- Johannes Schwan
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustraße 3, 10781 Berlin, Germany.
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17
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Zong Y, Wang W, Xu T. Total Synthesis of Bioactive Marine Meroterpenoids: The Cases of Liphagal and Frondosin B. Mar Drugs 2018; 16:md16040115. [PMID: 29614734 PMCID: PMC5923402 DOI: 10.3390/md16040115] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 03/28/2018] [Accepted: 03/28/2018] [Indexed: 01/09/2023] Open
Abstract
Liphagal and frondosin B are two marine-derived secondary metabolites sharing a very similar polyfused-benzofuran skeleton. The two tetracyclic meroterpenoids were isolated from marine sponges, both featuring a 6-5-7-6 fused ring system. A preliminary bioactive study shows that (+)-liphagal is a selective kinase (PI3K α) inhibitor, while (+)-frondosin B is shown to inhibit the binding of the cytokine interleukin-8 (IL-8) to its receptor, CX-CLR1/2. The unique structures and interesting biological profiles of these two meroterpenoids have attracted considerable attention from synthetic chemists. Herein we summarize the synthetic efforts with respect to (+)-liphagal and (+)-frondosin B during the past two decades.
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Affiliation(s)
- Yan Zong
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.
| | - Weijia Wang
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.
| | - Tao Xu
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.
- Laboratory for Marine Drugs and Bioproducts of Qingdao, National Laboratory for Marine Science and Technology (QNLM), 1 Wenhai Road, Qingdao 266237, China.
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18
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Joyce LA, Nawrat CC, Sherer EC, Biba M, Brunskill A, Martin GE, Cohen RD, Davies IW. Beyond optical rotation: what's left is not always right in total synthesis. Chem Sci 2018; 9:415-424. [PMID: 29629112 PMCID: PMC5868320 DOI: 10.1039/c7sc04249c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 10/27/2017] [Indexed: 12/02/2022] Open
Abstract
This work describes the application of vibrational (VCD) and electronic (ECD) circular dichroism spectroscopy to solve the longstanding debate around the absolute configuration of (+)-frondosin B (1). The absolute configuration of (+)-1 could confidently be assigned as (R) using these spectroscopic techniques. The discrepancy in the optical rotation (OR) values obtained in previous studies can be attributed to an undetected minor impurity (ca. 7%) that arose unexpectedly in a key step late in the synthesis. Additionally, the conditions used in the final step of the previous reports for demethylation to form the natural product proceeded with significant loss of enantiopurity. The large OR measured for the impurity at its observed level, when compared to the small rotation for the less enantiopure natural product 1, led to a measured OR value for the synthetic material that had the opposite sign of the natural product.
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Affiliation(s)
- Leo A Joyce
- Department of Process Research & Development , Merck & Co., Inc. , Rahway , NJ 07065 , USA . ;
| | - Christopher C Nawrat
- Department of Process Research & Development , Merck & Co., Inc. , Rahway , NJ 07065 , USA . ;
| | - Edward C Sherer
- Department of Modeling and Informatics , Merck & Co., Inc. , Rahway , NJ 07065 , USA
| | - Mirlinda Biba
- Department of Process Research & Development , Merck & Co., Inc. , Rahway , NJ 07065 , USA . ;
| | - Andrew Brunskill
- Department of Process Research & Development , Merck & Co., Inc. , Rahway , NJ 07065 , USA . ;
| | - Gary E Martin
- Department of Process Research & Development , Merck & Co., Inc. , Rahway , NJ 07065 , USA . ;
| | - Ryan D Cohen
- Department of Process Research & Development , Merck & Co., Inc. , Rahway , NJ 07065 , USA . ;
| | - Ian W Davies
- Department of Process Research & Development , Merck & Co., Inc. , Rahway , NJ 07065 , USA . ;
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19
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Kwon K, Ham JS, Kim HY, Sampath V, Lee HY. A Formal Total Synthesis of (+)-Frondosin A. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700367] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Kuktae Kwon
- Department of Chemistry; Korea Advanced Institute of Science&Technology (KAIST); 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea
| | - Jin Su Ham
- Department of Chemistry; Korea Advanced Institute of Science&Technology (KAIST); 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea
| | - Hyoun Young Kim
- Department of Chemistry; Korea Advanced Institute of Science&Technology (KAIST); 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea
| | - Vasu Sampath
- Department of Chemistry; Korea Advanced Institute of Science&Technology (KAIST); 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea
| | - Hee-Yoon Lee
- Department of Chemistry; Korea Advanced Institute of Science&Technology (KAIST); 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea
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20
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Fereyduni E, Grenning AJ. Factors Governing and Application of the Cope Rearrangement of 3,3-Dicyano-1,5-dienes and Related Studies. Org Lett 2017; 19:4130-4133. [PMID: 28723219 DOI: 10.1021/acs.orglett.7b01951] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cope and co-workers reported the [3,3] rearrangement of 3,3-dicyano-1,5-dienes in the early 1940s ("The Cope rearrangement"). However, these original substrates have remained largely unstudied until recently. Herein we explore styrene-deconjugating Cope rearrangements, a diastereoselective Cope rearrangement/deconjugative α-allylation sequence, and factors governing α- vs γ-allylation regioselectivity of Knoevenagel adduct allyl anions. Ultimately, these studies result in the synthesis of diverse and functionally dense polycycloalkane frameworks from abundant reagents using simple chemistry.
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Affiliation(s)
- Ehsan Fereyduni
- University of Florida , Department of Chemistry, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Alexander J Grenning
- University of Florida , Department of Chemistry, P.O. Box 117200, Gainesville, Florida 32611, United States
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21
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Larnaud F, Sulpizi A, Häggman NO, Hughes JME, Dewez DF, Gleason JL. Organocatalytic Michael Addition of Indoles to α-Substituted Enals by Using a Diazepane Carboxylate Catalyst. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700469] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Florent Larnaud
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
| | - Adamo Sulpizi
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
| | - Nicklas O. Häggman
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
| | - Jonathan M. E. Hughes
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
| | - Damien F. Dewez
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
| | - James L. Gleason
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
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22
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Huynh KQ, Seizert CA, Ozumerzifon TJ, Allegretti PA, Ferreira EM. Platinum-Catalyzed α,β-Unsaturated Carbene Formation in the Formal Syntheses of Frondosin B and Liphagal. Org Lett 2016; 19:294-297. [PMID: 27997203 DOI: 10.1021/acs.orglett.6b03682] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Formal syntheses of tetracyclic terpenoids frondosin B and liphagal are described. Both synthetic routes rely on the use of platinum-catalyzed α,β-unsaturated carbene formation for the key C-C bond forming transformations. The successful route toward frondosin B utilizes a formal (4 + 3) cycloaddition, while the liphagal synthesis features the vinylogous addition of an enol nucleophile as a key step. Both synthetic routes are discussed, revealing insights into structural requirements in the catalytic α,β-unsaturated carbene reaction manifold.
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Affiliation(s)
- Khoi Q Huynh
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
| | - Curtis A Seizert
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
| | - Tarik J Ozumerzifon
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
| | - Paul A Allegretti
- 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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23
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Lahtigui O, Emmetiere F, Zhang W, Jirmo L, Toledo-Roy S, Hershberger JC, Macho JM, Grenning AJ. Assembly of Terpenoid Cores by a Simple, Tunable Strategy. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608863] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Ouidad Lahtigui
- Department of Chemistry; University of Florida; PO Box 117200 Gainesville FL 32611-7200 USA
| | - Fabien Emmetiere
- Department of Chemistry; University of Florida; PO Box 117200 Gainesville FL 32611-7200 USA
| | - Wei Zhang
- Department of Chemistry; University of Florida; PO Box 117200 Gainesville FL 32611-7200 USA
| | - Liban Jirmo
- Department of Chemistry; University of Florida; PO Box 117200 Gainesville FL 32611-7200 USA
| | - Samira Toledo-Roy
- Department of Chemistry; University of Florida; PO Box 117200 Gainesville FL 32611-7200 USA
| | - John C. Hershberger
- Department of Chemistry and Physics; Arkansas State University; Jonesboro AR 72467 USA
| | - Jocelyn M. Macho
- Department of Chemistry; University of Florida; PO Box 117200 Gainesville FL 32611-7200 USA
| | - Alexander J. Grenning
- Department of Chemistry; University of Florida; PO Box 117200 Gainesville FL 32611-7200 USA
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24
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Lahtigui O, Emmetiere F, Zhang W, Jirmo L, Toledo-Roy S, Hershberger JC, Macho JM, Grenning AJ. Assembly of Terpenoid Cores by a Simple, Tunable Strategy. Angew Chem Int Ed Engl 2016; 55:15792-15796. [DOI: 10.1002/anie.201608863] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 10/24/2016] [Indexed: 12/28/2022]
Affiliation(s)
- Ouidad Lahtigui
- Department of Chemistry; University of Florida; PO Box 117200 Gainesville FL 32611-7200 USA
| | - Fabien Emmetiere
- Department of Chemistry; University of Florida; PO Box 117200 Gainesville FL 32611-7200 USA
| | - Wei Zhang
- Department of Chemistry; University of Florida; PO Box 117200 Gainesville FL 32611-7200 USA
| | - Liban Jirmo
- Department of Chemistry; University of Florida; PO Box 117200 Gainesville FL 32611-7200 USA
| | - Samira Toledo-Roy
- Department of Chemistry; University of Florida; PO Box 117200 Gainesville FL 32611-7200 USA
| | - John C. Hershberger
- Department of Chemistry and Physics; Arkansas State University; Jonesboro AR 72467 USA
| | - Jocelyn M. Macho
- Department of Chemistry; University of Florida; PO Box 117200 Gainesville FL 32611-7200 USA
| | - Alexander J. Grenning
- Department of Chemistry; University of Florida; PO Box 117200 Gainesville FL 32611-7200 USA
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25
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Wang Q, Tang XY, Shi M. Metal-Free Cross-Coupling of Arylboronic Acids and Derivatives with DAST-Type Reagents for Direct Access to Diverse Aromatic Sulfinamides and Sulfonamides. Angew Chem Int Ed Engl 2016; 55:10811-5. [DOI: 10.1002/anie.201605066] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 06/21/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Qiang Wang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
| | - Xiang-Ying Tang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
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26
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Wang Q, Tang XY, Shi M. Metal-Free Cross-Coupling of Arylboronic Acids and Derivatives with DAST-Type Reagents for Direct Access to Diverse Aromatic Sulfinamides and Sulfonamides. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Qiang Wang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
| | - Xiang-Ying Tang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
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27
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Trost BM, Debien L. Re-Orienting Coupling of Organocuprates with Propargyl Electrophiles from S N2' to S N2 with Stereocontrol. Chem Sci 2016; 7:4985-4989. [PMID: 28066535 PMCID: PMC5207346 DOI: 10.1039/c6sc01086e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Diorganocuprate(I) reagents derived from lithiated heterocycles and CuCN react with enantioenriched secondary propagryl bromides to give the corresponding propargylated heterocycles. While propargyl electrophiles typically undergo SN2' displacement, this transformation represents the first example of the reaction of hard carbanions with propargyl eletrophiles in an SN2 fashion and occurs with excellent levels of stereoinversion. The new method was applied to the formal synthesis of (+)-frondosin B.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry Stanford University, Stanford, California 94305-5080, United States
| | - Laurent Debien
- Department of Chemistry Stanford University, Stanford, California 94305-5080, United States
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28
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Molloy JJ, Watson AJB. B-Protected Boronic Acids: Methodology Development and Strategic Application. BORON REAGENTS IN SYNTHESIS 2016. [DOI: 10.1021/bk-2016-1236.ch012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- John J. Molloy
- Department of Pure and Applied Chemistry, WestCHEM, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow, G1 1XL, United Kingdom
| | - Allan J. B. Watson
- Department of Pure and Applied Chemistry, WestCHEM, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow, G1 1XL, United Kingdom
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29
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Water: the most versatile and nature’s friendly media in asymmetric organocatalyzed direct aldol reactions. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.09.009] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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30
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Bin HY, Wei X, Zi J, Zuo YJ, Wang TC, Zhong CM. Substrate-Controlled Regio- and Stereoselective Synthesis of Boron-Substituted 1,4-Dienes via Copper-Catalyzed Boryl–Allylation of Alkynes with Allyl Phosphates and Bis(pinacolato)diboron. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01441] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Huai-Yu Bin
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Science, Northwest A&F University, Yangling 712100, P. R. China
| | - Xiao Wei
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Science, Northwest A&F University, Yangling 712100, P. R. China
| | - Jing Zi
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Science, Northwest A&F University, Yangling 712100, P. R. China
| | - Ya-Jie Zuo
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Science, Northwest A&F University, Yangling 712100, P. R. China
| | - Tian-Chi Wang
- Department
of Chemistry, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, P. R. China
| | - Chong-Min Zhong
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Science, Northwest A&F University, Yangling 712100, P. R. China
- Department
of Chemistry, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, P. R. China
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31
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Chang YP, Gurubrahamam R, Chen K. Enantioselective Synthesis of Functionalized Polycarbocycles via a Three-Component Organocascade Quadruple Reaction. Org Lett 2015; 17:2908-11. [PMID: 26020799 DOI: 10.1021/acs.orglett.5b01040] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient organocascade quadruple reaction was conducted to synthesize a functionalized spiropolycyclic scaffold in high chemical yields (43-80%) and excellent levels of stereoselectivity (up to >19:1 dr and 99% ee). The quadruple reaction proceeded smoothly between 1,3-indanedione and aromatic aldehydes with concomitant desymmetrization of prochiral 4-substituted cyclohexanones through the Knoevenagel/Michael/aldol/aldol reaction sequence catalyzed by a bifunctional thiourea catalyst. Two of the formed products were transformed into spirocyclic epoxides containing four contiguous quaternary centers.
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Affiliation(s)
- Yun-Pu Chang
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Ramani Gurubrahamam
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Kwunmin Chen
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
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32
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Sun S, Yu JT, Jiang Y, Cheng J. Cs2CO3-promoted carboxylation of N-tosylhydrazones with carbon dioxide toward α-arylacrylic acids. J Org Chem 2015; 80:2855-60. [PMID: 25695856 DOI: 10.1021/jo502908v] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A Cs2CO3-promoted carboxylation of N-tosylhydrazones and CO2 has been developed. The reaction proceeded efficiently at 80 °C under atmospheric CO2, gave the corresponding α-arylacrylic acids in moderate to good yields. This method was featured with (1) the employment of Cs2CO3 rather than (n)BuLi as the base; (2) a reaction temperature of 80 °C rather than -78 °C.
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Affiliation(s)
- Song Sun
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Changzhou University , Changzhou 213164, P. R. China
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33
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Cao KS, Bian HX, Zheng WH. Mild arylboronic acid catalyzed selective [4 + 3] cycloadditions: access to cyclohepta[b]benzofurans and cyclohepta[b]indoles. Org Biomol Chem 2015; 13:6449-52. [DOI: 10.1039/c5ob00653h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The first example of arylboronic acid catalyzed [4 + 3] cycloaddition reaction is reported.
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Affiliation(s)
- Kou-Sen Cao
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Hong-Xu Bian
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Wen-Hua Zheng
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
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34
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Alves LDC, Desiderá AL, de Oliveira KT, Newton S, Ley SV, Brocksom TJ. A practical deca-gram scale ring expansion of (R)-(−)-carvone to (R)-(+)-3-methyl-6-isopropenyl-cyclohept-3-enone-1. Org Biomol Chem 2015; 13:7633-42. [DOI: 10.1039/c5ob00525f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A route to enantiopure (R)-(+)-3-methyl-6-isopropenyl-cyclohept-3-enone-1, an intermediate for terpenoids, has been developed and includes a highly chemo- and regioselective Tiffeneau–Demjanov reaction.
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Affiliation(s)
- Leandro de C. Alves
- Departamento de Química
- Universidade Federal de São Carlos
- São Carlos – SP
- Brazil
| | - André L. Desiderá
- Departamento de Química
- Universidade Federal de São Carlos
- São Carlos – SP
- Brazil
| | | | - Sean Newton
- Department of Chemistry
- University of Cambridge
- Cambridge
- UK
| | - Steven V. Ley
- Department of Chemistry
- University of Cambridge
- Cambridge
- UK
| | - Timothy J. Brocksom
- Departamento de Química
- Universidade Federal de São Carlos
- São Carlos – SP
- Brazil
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35
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Liang ZQ, Gao ZH, Jia WQ, Ye S. Bifunctional N-Heterocyclic Carbene Catalyzed [3+4] Annulation of Enals and Aurones. Chemistry 2014; 21:1868-72. [DOI: 10.1002/chem.201405828] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Indexed: 12/25/2022]
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36
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VanHeyst MD, Wright DL. The Frondosins: An Unusual Synthetic and Stereochemical Journey. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403116] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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37
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Bos M, Riguet E. Synthesis of chiral γ-lactones by one-pot sequential enantioselective organocatalytic michael addition of boronic acids and diastereoselective intramolecular passerini reaction. J Org Chem 2014; 79:10881-9. [PMID: 25365780 DOI: 10.1021/jo501908z] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The synthesis of α,γ-substituted chiral γ-lactones was quickly achieved in a one pot sequential process. The procedure involves an enantioselective organocatalysed transfer of boronic acid to 5-hydroxyfuran-2(5H)-one, followed by an intramolecular diastereoselective Passerini-type reaction. The methodology was developed and optimized with N-Boc-indole-2-boronic acid giving access to α-indole-γ-substituted lactones in high yields and good diastereoisomeric and enantiomeric ratios. By applying the process to other boronic acids, the synthesis of structurally diversified α,γ-substituted chiral lactones was also achieved in good yields albeit with lower enantioselectivities.
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Affiliation(s)
- Maxence Bos
- Université de Reims Champagne-Ardenne , Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, UFR des Sciences Exactes et Naturelles, BP 1039, 51687 Reims Cedex 2, France
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38
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Madhavachary R, Ramachary DB. High-Yielding Total Synthesis of Sexually Deceptive Chiloglottones and Antimicrobial Dialkylresorcinols through an Organocatalytic Reductive Coupling Reaction. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403128] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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39
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Jansen DJ, Shenvi RA. Synthesis of medicinally relevant terpenes: reducing the cost and time of drug discovery. Future Med Chem 2014; 6:1127-48. [PMID: 25078134 PMCID: PMC4162426 DOI: 10.4155/fmc.14.71] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Terpenoids constitute a significant fraction of molecules produced by living organisms that have found use in medicine and other industries. Problems associated with their procurement and adaptation for human use can be solved using chemical synthesis, which is an increasingly economical option in the modern era of chemistry. This article documents, by way of individual case studies, strategies for reducing the time and cost of terpene synthesis for drug discovery. A major trend evident in recent syntheses is that complex terpenes are increasingly realistic starting points for both medicinal chemistry campaigns and large-scale syntheses, at least in the context of the academic laboratory, and this trend will likely penetrate the commercial sector in the near future.
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Affiliation(s)
- Daniel J Jansen
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Ryan A Shenvi
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
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40
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Huang Q, Ke S, Qiu L, Zhang X, Lin S. Palladium(II)/Polyoxometalate-Catalyzed Direct Alkenylation of Benzofurans under Atmospheric Dioxygen. ChemCatChem 2014. [DOI: 10.1002/cctc.201400091] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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41
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Oblak EZ, VanHeyst MD, Li J, Wiemer AJ, Wright DL. Cyclopropene cycloadditions with annulated furans: total synthesis of (+)- and (-)-frondosin B and (+)-frondosin A. J Am Chem Soc 2014; 136:4309-15. [PMID: 24575795 DOI: 10.1021/ja413106t] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The asymmetric total syntheses of the natural products (+)- and (-)-frondosin B and (+)-frondosin A are reported based on a diastereoselective cycloaddition between tetrabromocyclopropene and an annulated furan to provide a highly functionalized common building block. The bridged bicyclic intermediate could be stereo- and chemoselectively manipulated to produce the two structurally distinct members of the frondosins. Both syntheses feature regioselective palladium-coupling reactions and an unprecedented phosphine-mediated ether bridge cleavage. Surprisingly, the planned enantioselective synthesis of frondosin B led to the opposite epimer of the natural product, suggesting an unusual late stage stereoinversion at C8. Frondosin A, but not frondosin B, was shown to have selective antiproliferative activity against several B-cell lines.
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Affiliation(s)
- E Zachary Oblak
- Department of Pharmaceutical Sciences, University of Connecticut , 69 N. Eagleville Road, Storrs, Connecticut 06269, United States
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42
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Roscales S, Csákÿ AG. Transition-metal-free C–C bond forming reactions of aryl, alkenyl and alkynylboronic acids and their derivatives. Chem Soc Rev 2014; 43:8215-25. [DOI: 10.1039/c4cs00195h] [Citation(s) in RCA: 154] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Transition-metal-free C–C bond forming reactions of boronic acids are new emerging tools in organic synthesis which complement metal-based procedures.
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Affiliation(s)
- S. Roscales
- Instituto Pluridisciplinar
- Universidad Complutense de Madrid
- Campus de Excelencia Internactional Moncloa
- 28040-Madrid, Spain
| | - A. G. Csákÿ
- Instituto Pluridisciplinar
- Universidad Complutense de Madrid
- Campus de Excelencia Internactional Moncloa
- 28040-Madrid, Spain
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43
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Laplace DR, Verbraeken B, Van Hecke K, Winne JM. Total Synthesis of (+/−)-Frondosin B and (+/−)-5-epi-Liphagal by Using a Concise (4+3) Cycloaddition Approach. Chemistry 2013; 20:253-62. [DOI: 10.1002/chem.201303273] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Indexed: 11/07/2022]
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44
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Pagoti S, Dutta D, Dash J. A Magnetoclick Imidazolidinone Nanocatalyst for Asymmetric 1,3‐Dipolar Cycloadditions. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300624] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Sreenivasarao Pagoti
- Department of Organic Chemistry, Indian Association for the Cultivation of Science Jadavpur, Kolkata – 700032, India
| | - Debasish Dutta
- Department of Organic Chemistry, Indian Association for the Cultivation of Science Jadavpur, Kolkata – 700032, India
| | - Jyotirmayee Dash
- Department of Organic Chemistry, Indian Association for the Cultivation of Science Jadavpur, Kolkata – 700032, India
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45
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Gold(I)-Catalyzedendo-Selective Intramolecular α-Alkenylation of β-Yne-Furans: Synthesis of Seven-Membered-Ring-Fused Furans and DFT Calculations. Angew Chem Int Ed Engl 2013; 52:14157-61. [DOI: 10.1002/anie.201306965] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 09/30/2013] [Indexed: 11/07/2022]
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Dong Z, Liu CH, Wang Y, Lin M, Yu ZX. Gold(I)-Catalyzedendo-Selective Intramolecular α-Alkenylation of β-Yne-Furans: Synthesis of Seven-Membered-Ring-Fused Furans and DFT Calculations. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306965] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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George J, Reddy BVS. Enantioselective Mukaiyama-Michael Reaction of Silyl Enol Ethers to 2-EnoylpyridineN-Oxides Catalyzed by Copper- Bis(oxazoline) Complex. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201200631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
Beyond doubt organocatalysis belongs to the most exciting and innovative chapters of organic chemistry today. Organocatalysis has emerged not only as a complement to metal-catalyzed reactions or to biocatalysis over the past decade, but also new asymmetric organocatalyzed reactions have been discovered that could not be accomplished by metal- or biocatalyzed reactions so far. This review gives a brief overview of organocatalyzed asymmetric C-C bond formation processes currently available.
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Endo K, Hamada D, Yakeishi S, Shibata T. Effect of Multinuclear Copper/Aluminum Complexes in Highly Asymmetric Conjugate Addition of Trimethylaluminum to Acyclic Enones. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/anie.201206297] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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