1
|
Zhang B, Jin Z, Huang C, Zhang Y, Shen G, Kang H, Lv X, Zhou L. Highly Diastereoselective One-Pot Synthesis of 4,5-Dihydrofuro[2,3- b]azocin-6-one Derivatives through Cyclization/[4+4] Annulation Reactions. J Org Chem 2023. [PMID: 37155326 DOI: 10.1021/acs.joc.3c00003] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A variety of 4,5-dihydrofuro[2,3-b]azocin-6-one derivatives were expediently assembled through Au(I)-catalyzed cyclization and 2-(tert-butyl)-1,1,3,3-tetramethylguanidine (BTMG)-mediated [4+4] annulation reactions of enyne-amides and ynones. The reactions exhibit high efficiency with excellent regio- and diastereoselectivity. A broad spectrum of substrates was utilized. The products with an eight-membered ring might be useful in biological chemistry and medicinal science. Furthermore, the products could be facilely converted into various derivatives.
Collapse
Affiliation(s)
- Bei Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Zefeng Jin
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Chaoman Huang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Yankun Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Guodong Shen
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252059, Shandong, People's Republic of China
| | - Honglan Kang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Xin Lv
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Liejin Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| |
Collapse
|
2
|
Shaw P, Hassell-Hart SJ, Douglas GE, Malcolm AG, Kennedy AR, White GV, Paterson LC, Kerr WJ. Oxygenated Cyclopentenones via the Pauson-Khand Reaction of Silyl Enol Ether Substrates. Org Lett 2022; 24:2750-2755. [PMID: 35377671 PMCID: PMC9016766 DOI: 10.1021/acs.orglett.2c00856] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
![]()
We report here the
application of silyl enol ether moieties as
efficient alkene coupling partners within cobalt-mediated intramolecular
Pauson–Khand reactions. This cyclization strategy delivers
synthetically valuable oxygenated cyclopentenone products in yields
of ≤93% from both ketone- and aldehyde-derived silyl enol ethers,
incorporates both terminal and internal alkyne partners, and delivers
a variety of decorated systems, including more complex tricyclic structures.
Facile removal of the silyl protecting group reveals oxygenated sites
for potential further elaboration.
Collapse
Affiliation(s)
- Paul Shaw
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K
| | - Storm J Hassell-Hart
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K.,Medicines Research Centre, GlaxoSmithKline, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, England, U.K
| | - Gayle E Douglas
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K
| | - Andrew G Malcolm
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K
| | - Alan R Kennedy
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K
| | - Gemma V White
- Medicines Research Centre, GlaxoSmithKline, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, England, U.K
| | - Laura C Paterson
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K
| | - William J Kerr
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K
| |
Collapse
|
3
|
Tzani MA, Fountoulaki S, Lykakis IN. Polyoxometalate-Driven Ease Conversion of Valuable Furfural to trans- N, N-4,5-Diaminocyclopenten-2-ones. J Org Chem 2022; 87:2601-2615. [PMID: 35073691 DOI: 10.1021/acs.joc.1c02550] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We investigated the catalytic efficacy of silicotungstic acid (H4SiW12O40) polyoxometalate (POM) toward the reaction between furfural and amines that selectively yields trans-N,N-4,5-substituted-diaminocyclopenten-2-ones (trans-DACPs). H4SiW12O40 facilitates the synthesis of a library of trans-DACPs with loadings as low as 0.05 mol %, in open air, without additives, in short times and good to high isolated yields. The protocol was applied to secondary amines as well as to aromatic primary amines with pKb higher than ca. 9. The present catalytic synthetic protocol has an extended substrate scope with high yields and represents, to the best of our knowledge, the first polyoxometalate-driven paradigm as an efficient method to produce cyclopentanone frameworks under mild reaction conditions.
Collapse
Affiliation(s)
- Marina A Tzani
- Department of Chemistry, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Stella Fountoulaki
- Department of Chemistry, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Ioannis N Lykakis
- Department of Chemistry, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| |
Collapse
|
4
|
Wang X, Li D, Zhang J, Gong J, Fu J, Yang Z. A Synthetic Route to The Core Structure of (-)-Retigeranic Acid A. Org Lett 2021; 23:5092-5097. [PMID: 34128684 DOI: 10.1021/acs.orglett.1c01633] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Retigeranic acid A is a uniquely structured pentacyclic sesterterpene bearing eight stereogenic centers. We report a concise route to the core structure of (-)-retigeranic acid A. The stereochemistry of its six chiral centers and three quaternary carbon centers was well-controlled. This route features two intramolecular Pauson-Khand reactions (IMPKRs): the first forged the D and E rings to deliver the triquinane subunit, and the second constructed the A and B rings and diastereoselectively installed the quaternary C6a center.
Collapse
Affiliation(s)
- Xiao Wang
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong 518055, China
| | - Dian Li
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong 518055, China
| | - Junlin Zhang
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong 518055, China
| | - Jianxian Gong
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong 518055, China
| | - Junkai Fu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Zhen Yang
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong 518055, China.,Beijing National Laboratory for Molecular Science and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education, College of Chemistry and Molecular Engineering and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China.,Shenzhen Bay Laboratory, Shenzhen, Guangdong 518055, China
| |
Collapse
|
5
|
Teimouri MB, Heydari M, Mohammadi K. Substrate-controlled selectivity switch in a three-component reaction: sequential synthesis of spiro-oxazolidinedione-cyclopentenones and hydroxy enaminobarbiturates in water. RSC Adv 2020; 10:13601-13610. [PMID: 35492975 PMCID: PMC9051567 DOI: 10.1039/d0ra01699c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 03/25/2020] [Indexed: 11/21/2022] Open
Abstract
An efficient eco-friendly catalyst-free three-component domino multicyclization for the synthesis of new spirobicyclic oxazolidinedione containing cyclopentenone moieties has been established by mixing amines, β-dicarbonyl compounds and N,N'-dimethylalloxan in water at room temperature. This domino process involves multiple reactions such as enamination/aldol-like reaction/Stork enamine annulation/intramolecular cyclization under mild conditions.
Collapse
Affiliation(s)
| | - Mahdi Heydari
- Faculty of Chemistry, Kharazmi University Mofateh Ave. Tehran Iran
| | - Kazem Mohammadi
- Faculty of Chemistry, Kharazmi University Mofateh Ave. Tehran Iran
| |
Collapse
|
6
|
|
7
|
Cheng B, Reyes J. Recent progress on the total syntheses of macrocyclic diamine alkaloids. Nat Prod Rep 2020; 37:322-337. [DOI: 10.1039/c9np00031c] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review highlights the progress and challenges in the chemical synthesis of macrocyclic diamine alkaloids since 2006.
Collapse
Affiliation(s)
- Bichu Cheng
- School of Science
- Harbin Institute of Technology
- Shenzhen
- China
| | - Julius Reyes
- Department of Chemistry
- New York University
- New York
- USA
| |
Collapse
|
8
|
Ma K, Martin BS, Yin X, Dai M. Natural product syntheses via carbonylative cyclizations. Nat Prod Rep 2019; 36:174-219. [PMID: 29923586 DOI: 10.1039/c8np00033f] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review summarizes the application of various transition metal-catalyzed/mediated carbonylative cyclization reactions in natural product total synthesis.
Collapse
Affiliation(s)
- Kaiqing Ma
- Department of Chemistry
- Center for Cancer Research
- Institute for Drug Discovery
- Purdue University
- West Lafayette
| | - Brandon S. Martin
- Department of Chemistry
- Center for Cancer Research
- Institute for Drug Discovery
- Purdue University
- West Lafayette
| | - Xianglin Yin
- Department of Chemistry
- Center for Cancer Research
- Institute for Drug Discovery
- Purdue University
- West Lafayette
| | - Mingji Dai
- Department of Chemistry
- Center for Cancer Research
- Institute for Drug Discovery
- Purdue University
- West Lafayette
| |
Collapse
|
9
|
Biorenewable Deep Eutectic Solvent for Selective and Scalable Conversion of Furfural into Cyclopentenone Derivatives. Molecules 2018; 23:molecules23081891. [PMID: 30060584 PMCID: PMC6222497 DOI: 10.3390/molecules23081891] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 07/13/2018] [Accepted: 07/26/2018] [Indexed: 12/26/2022] Open
Abstract
The development of novel synthetic routes to produce bioactive compounds starting from renewable sources has become an important research area in organic and medicinal chemistry. Here, we present a low-cost procedure for the tunable and selective conversion of biomass-produced furfural to cyclopentenone derivatives using a mixture of choline chloride and urea as a biorenewable deep eutectic solvent (DES). The proposed medium is a nontoxic, biodegradable, and could be reused up to four times without any unfavorable effect on the reaction yield. The process is tunable, clean, cheap, simple and scalable and meets most of the criteria; therefore, it can be considered as an environmental sustainable process in a natural reaction medium.
Collapse
|
10
|
Affiliation(s)
- Samaresh Jana
- Department of ChemistrySchool of Applied SciencesKalinga Institute of Industrial Technology (KIIT) Bhubaneswar-751024, Odisha India
| | - Habtamu Gelaw Mekonnen
- Department of ChemistrySchool of Applied SciencesKalinga Institute of Industrial Technology (KIIT) Bhubaneswar-751024, Odisha India
| |
Collapse
|
11
|
Wang KY, Liu DD, Sun TW, Lu Y, Zhang SL, Li YH, Han YX, Liu HY, Peng C, Wang QY, Chen JH, Yang Z. Asymmetric Total Synthesis of Lancifodilactone G Acetate. 2. Final Phase and Completion of the Total Synthesis. J Org Chem 2018; 83:6907-6923. [PMID: 29508620 DOI: 10.1021/acs.joc.7b02917] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The asymmetric total synthesis of lancifodilactone G acetate was accomplished in 28 steps. The key steps in this synthesis include (i) an asymmetric Diels-Alder reaction for formation of the scaffold of the BC ring; (ii) an intramolecular ring-closing metathesis reaction for the formation of the trisubstituted cyclooctene using a Hoveyda-Grubbs II catalyst; (iii) an intramolecular Pauson-Khand reaction for construction of the sterically congested F ring; (iv) sequential cross-metathesis, hydrogenation, and lactonization reactions for installation of the anomerically stabilized bis-spiro ketal fragment of lancifodilactone G; and (v) a Dieckmann-type condensation reaction for installation of the A ring. The strategy and chemistry developed for the total synthesis will be useful in the synthesis of other natural products and complex molecules.
Collapse
Affiliation(s)
- Kuang-Yu Wang
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and the Peking University , Beijing 100871 , China
| | - Dong-Dong Liu
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and the Peking University , Beijing 100871 , China
| | - Tian-Wen Sun
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and the Peking University , Beijing 100871 , China
| | - Yong Lu
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and the Peking University , Beijing 100871 , China
| | - Su-Lei Zhang
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and the Peking University , Beijing 100871 , China
| | - Yuan-He Li
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and the Peking University , Beijing 100871 , China
| | - Yi-Xin Han
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and the Peking University , Beijing 100871 , China
| | - Hao-Yuan Liu
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and the Peking University , Beijing 100871 , China
| | - Cheng Peng
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and the Peking University , Beijing 100871 , China
| | - Qin-Yang Wang
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and the Peking University , Beijing 100871 , China
| | - Jia-Hua Chen
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and the Peking University , Beijing 100871 , China
| | - Zhen Yang
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and the Peking University , Beijing 100871 , China.,Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Shenzhen Graduate School of Peking University , Shenzhen 518055 , China
| |
Collapse
|
12
|
Ashley WL, Timpy EL, Coombs TC. Flow Photo-Nazarov Reactions of 2-Furyl Vinyl Ketones: Cyclizing a Class of Traditionally Unreactive Heteroaromatic Enones. J Org Chem 2018; 83:2516-2529. [PMID: 29400058 DOI: 10.1021/acs.joc.7b03171] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Nazarov reactions of 2-furyl vinyl ketones and related heteroaromatic enones, to produce furan-fused cyclopentanones using a flow photochemical approach, are described. Compounds possessing this connectivity between heterocycle and ketone (2-furyl, 2-benzofuryl, 2-thiophene-yl, and 2-benzothiophene-yl) have traditionally proven difficult or impossible to cyclize with typical Brønsted and Lewis acid mediated methods. Using mild flow photochemistry conditions and acetic acid (AcOH) or hexafluoroisopropanol (HFIP) as solvent, these compounds were found to cyclize in 45-97% yields, with typical UV exposure times of 3.4-6.8 min. In all cases, 2-furyl and 2-thiophene-yl enones cyclized, whereas 2-benzofuryl and 2-benzothiophene-yl enones exhibited divergent properties with reactivity patterns tied to the identity of the vinyl group. This report discloses the first photo-Nazarov reactions of tetrahydropyridine-substituted 2-furyl ketones, providing a direct approach to the corresponding fused heterocyclic motifs built around a central cyclopentanone. These motifs constitute the core structures of biologically active natural products, including the marine alkaloid nakadomarin A.
Collapse
Affiliation(s)
- William L Ashley
- Department of Chemistry and Biochemistry, University of North Carolina Wilmington , Dobo Hall, Wilmington, North Carolina 28403, United States
| | - Evan L Timpy
- Department of Chemistry and Biochemistry, University of North Carolina Wilmington , Dobo Hall, Wilmington, North Carolina 28403, United States
| | - Thomas C Coombs
- Department of Chemistry and Biochemistry, University of North Carolina Wilmington , Dobo Hall, Wilmington, North Carolina 28403, United States
| |
Collapse
|
13
|
Mukai C. Creation of Novel Cyclization Methods Using sp-Hybridized Carbon Units and Syntheses of Bioactive Compounds. Chem Pharm Bull (Tokyo) 2017; 65:511-523. [PMID: 28566644 DOI: 10.1248/cpb.c17-00088] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Some recent results on the development of new and reliable procedures for the construction of diverse ring systems based on the chemistry of sp-hybridized species, especially allene functionality, are described. This review includes: (i) synthesis of the multi-cyclic skeletons by combination of the π-component of allene with suitable other π-components such as alkyne, alkene, or additional allene under Rh-catalyzed conditions; (ii) synthesis of heterocycles as well as carbocycles by reaction of the sp-hybridized center of allene with some nucleophiles in an endo-mode manner; and (iii) total syntheses of natural products and related compounds from the sp-hybridized starting materials.
Collapse
Affiliation(s)
- Chisato Mukai
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University
| |
Collapse
|
14
|
Abd El-Gaber MK, Yasuda S, Iida E, Mukai C. Enantioselective Total Synthesis of (+)-Sieboldine A. Org Lett 2017; 19:320-323. [DOI: 10.1021/acs.orglett.6b03416] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mohammed K. Abd El-Gaber
- Division of Pharmaceutical
Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Shigeo Yasuda
- Division of Pharmaceutical
Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Eisuke Iida
- Division of Pharmaceutical
Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Chisato Mukai
- Division of Pharmaceutical
Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| |
Collapse
|
15
|
Synthesis of trans-4,5-diaminocyclopent-2-enones from furfural catalyzed by Er(III) immobilized on silica. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2016.12.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
16
|
Affiliation(s)
- Chiara Cabrele
- Department
of Molecular Biology, University of Salzburg, Billrothstrasse 11, 5020 Salzburg, Austria
| | - Oliver Reiser
- Institut
für Organische Chemie, Universität Regensburg, Universitätsstrasse
31, 93053 Regensburg, Germany
| |
Collapse
|
17
|
Griffiths K, Kumar P, Mattock JD, Abdul-Sada A, Pitak MB, Coles SJ, Navarro O, Vargas A, Kostakis GE. Efficient NiII2LnIII2 Electrocyclization Catalysts for the Synthesis of trans-4,5-Diaminocyclopent-2-enones from 2-Furaldehyde and Primary or Secondary Amines. Inorg Chem 2016; 55:6988-94. [DOI: 10.1021/acs.inorgchem.6b00720] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kieran Griffiths
- Department
of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, United Kingdom
| | - Prashant Kumar
- Department
of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, United Kingdom
| | - James D. Mattock
- Department
of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, United Kingdom
| | - Alaa Abdul-Sada
- Department
of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, United Kingdom
| | - Mateusz B. Pitak
- UK National
Crystallography Service, Chemistry, University of Southampton, Highfield
Campus, Southampton, SO17
1BJ, United Kingdom
| | - Simon J. Coles
- UK National
Crystallography Service, Chemistry, University of Southampton, Highfield
Campus, Southampton, SO17
1BJ, United Kingdom
| | - Oscar Navarro
- Department
of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, United Kingdom
| | - Alfredo Vargas
- Department
of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, United Kingdom
| | - George E. Kostakis
- Department
of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, United Kingdom
| |
Collapse
|
18
|
Shi L, Yang Z. Exploring the Complexity-Generating Features of the Pauson-Khand Reaction from a Synthetic Perspective. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600123] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
19
|
Clark JS, Xu C. Total Synthesis of (−)-Nakadomarin A. Angew Chem Int Ed Engl 2016; 55:4332-5. [DOI: 10.1002/anie.201600990] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Indexed: 11/08/2022]
Affiliation(s)
- J. Stephen Clark
- WestCHEM; School of Chemistry; Joseph Black Building; University of Glasgow; University Avenue Glasgow G12 8QQ UK
| | - Chao Xu
- WestCHEM; School of Chemistry; Joseph Black Building; University of Glasgow; University Avenue Glasgow G12 8QQ UK
| |
Collapse
|
20
|
Affiliation(s)
- J. Stephen Clark
- WestCHEM; School of Chemistry; Joseph Black Building; University of Glasgow; University Avenue Glasgow G12 8QQ UK
| | - Chao Xu
- WestCHEM; School of Chemistry; Joseph Black Building; University of Glasgow; University Avenue Glasgow G12 8QQ UK
| |
Collapse
|
21
|
You L, Liang XT, Xu LM, Wang YF, Zhang JJ, Su Q, Li YH, Zhang B, Yang SL, Chen JH, Yang Z. Asymmetric Total Synthesis of Propindilactone G. J Am Chem Soc 2015; 137:10120-3. [DOI: 10.1021/jacs.5b06480] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lin You
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry
of Education and Beijing National Laboratory for Molecular Science
(BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Xin-Ting Liang
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry
of Education and Beijing National Laboratory for Molecular Science
(BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Ling-Min Xu
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry
of Education and Beijing National Laboratory for Molecular Science
(BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Yue-Fan Wang
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry
of Education and Beijing National Laboratory for Molecular Science
(BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Jia-Jun Zhang
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry
of Education and Beijing National Laboratory for Molecular Science
(BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Qi Su
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry
of Education and Beijing National Laboratory for Molecular Science
(BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Yuan-He Li
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry
of Education and Beijing National Laboratory for Molecular Science
(BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Bo Zhang
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry
of Education and Beijing National Laboratory for Molecular Science
(BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Shou-Liang Yang
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry
of Education and Beijing National Laboratory for Molecular Science
(BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Jia-Hua Chen
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry
of Education and Beijing National Laboratory for Molecular Science
(BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Zhen Yang
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry
of Education and Beijing National Laboratory for Molecular Science
(BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
- Laboratory
of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Key
Laboratory of Marine Drugs, Chinese Ministry of Education, School
of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, China
| |
Collapse
|
22
|
Zhang J, Wang X, Li S, Li D, Liu S, Lan Y, Gong J, Yang Z. Diastereoselective Synthesis of Cyclopentanoids: Applications to the Construction of the ABCD Tetracyclic Core of Retigeranic Acid A. Chemistry 2015. [DOI: 10.1002/chem.201502423] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
23
|
|
24
|
Mukai C, Arima K, Hirata S, Yasuda S. Synthesis of a carbon analogue of scytonemin. Chem Pharm Bull (Tokyo) 2015; 63:273-7. [PMID: 25832021 DOI: 10.1248/cpb.c14-00838] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The synthesis of a carbon analogue of scytonemin was accomplished on the basis of molybdenum-mediated intramolecular double Pauson-Khand type reaction of bis(allenyne), followed by the double aldol condensation of the formed double Pauson-Khand type adduct.
Collapse
Affiliation(s)
- Chisato Mukai
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University
| | | | | | | |
Collapse
|
25
|
Tsuji N, Stadler M, Kazumi N, Inokuma T, Kobayashi Y, Takemoto Y. Catalytic asymmetric synthesis of the pentacyclic core of (−)-nakadomarin A via oxazolidine as an iminium cation equivalent. Org Biomol Chem 2014; 12:7919-22. [DOI: 10.1039/c4ob01678e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A catalytic asymmetric synthesis of the pentacyclic core of (−)-nakadomarin A was achieved.
Collapse
Affiliation(s)
- Nobuya Tsuji
- Graduate School of Pharmaceutical Sciences
- Kyoto University Institution
- Sakyo-ku, Japan
| | - Michael Stadler
- Graduate School of Pharmaceutical Sciences
- Kyoto University Institution
- Sakyo-ku, Japan
| | - Naoya Kazumi
- Graduate School of Pharmaceutical Sciences
- Kyoto University Institution
- Sakyo-ku, Japan
| | - Tsubasa Inokuma
- Institute of Health Biosciences and Graduate School of Pharmaceutical Sciences
- The University of Tokushima
- Shomachi, Japan
| | - Yusuke Kobayashi
- Graduate School of Pharmaceutical Sciences
- Kyoto University Institution
- Sakyo-ku, Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences
- Kyoto University Institution
- Sakyo-ku, Japan
| |
Collapse
|
26
|
Chavda JK, Procopiou PA, Horton PN, Coles SJ, Porter MJ. Synthetic Studies Towards the Core Structure of Nakadomarin A by a Thioamide-Based Strategy. European J Org Chem 2014; 2014:129-139. [PMID: 24829538 PMCID: PMC4015372 DOI: 10.1002/ejoc.201301063] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Indexed: 11/29/2022]
Abstract
The tricyclic BCD substructure of the marine natural product nakadomarin A has been synthesised. The strategy utilised a key carbon-carbon bond-forming reaction between a furan and an N-acyliminium ion derived from a secondary thiolactam. In addition, a novel three-component coupling reaction between a thioamide, an allylic bromide and an isocyanate, leading to the establishment of two new stereogenic centres, is reported. Two key steps in a projected total synthesis of nakadomarin A have been realised by using the unique chemistry of thioamides. Formation of the carbocyclic B ring can be effected by nucleophilic attack of a furan on a thiolactam-derived iminium ion, and the key quaternary centre can be established by a novel three-component coupling reaction.
Collapse
Affiliation(s)
- Jai K Chavda
- Department of Chemistry, University College London Christopher Ingold Building, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Panayiotis A Procopiou
- GlaxoSmithKline Research & Development Limited, Medicines Research Centre Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, UK
| | - Peter N Horton
- UK National Crystallography Service, School of Chemistry, University of Southampton Southampton, SO17 1BJ, UK
| | - Simon J Coles
- UK National Crystallography Service, School of Chemistry, University of Southampton Southampton, SO17 1BJ, UK
| | - Michael J Porter
- Department of Chemistry, University College London Christopher Ingold Building, 20 Gordon Street, London, WC1H 0AJ, UK
| |
Collapse
|
27
|
Wu F, Chen Y, Cheng B, Li Y, Zhai H. Synthesis of the Tetracyclic Core Structure of (±)-Nakadomarin A through Azomethine Ylide-Alkene [3+2] Cycloaddtion. ASIAN J ORG CHEM 2013. [DOI: 10.1002/ajoc.201300100] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
28
|
Bonazzi S, Cheng B, Wzorek JS, Evans DA. Total Synthesis of (−)-Nakadomarin A. J Am Chem Soc 2013; 135:9338-41. [DOI: 10.1021/ja404673s] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Simone Bonazzi
- Department
of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138,
United States
| | - Bichu Cheng
- Department
of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138,
United States
| | - Joseph S. Wzorek
- Department
of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138,
United States
| | - David A. Evans
- Department
of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138,
United States
| |
Collapse
|
29
|
He T, Gao P, Zhao SC, Shi YD, Liu XY, Liang YM. Platinum(IV)-Catalyzed Regioselective Synthesis of Highly Substituted 4H-Cyclopenta[b]furansviaCascade Hetero- cyclization of 2-(1-Alkynyl)-3-aryl-2-propenals with Arylethenes. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201200597] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
30
|
Nunes JPM, Afonso CAM, Caddick S. Synthesis of 2,4-bifunctionalised cyclopentenones from 2-furaldehyde. RSC Adv 2013. [DOI: 10.1039/c3ra42663g] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
31
|
|
32
|
Shi LL, Shen HJ, Fang LC, Huang J, Li CC, Yang Z. Development of an expedient intramolecular Pauson–Khand reaction approach to stereoselectively construct the trans-decalin with a C1 quaternary chiral center. Chem Commun (Camb) 2013; 49:8806-8. [DOI: 10.1039/c3cc45170d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
33
|
Hamasaki A, Ishida T, Tokunaga M. Novel Feature and Catalysis of Metal Oxide Supported Gold Nanoparticles. J SYN ORG CHEM JPN 2013. [DOI: 10.5059/yukigoseikyokaishi.71.443] [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]
|
34
|
Herndon JW. The chemistry of the carbon–transition metal double and triple bond: Annual survey covering the year 2010. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.02.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
35
|
Cobalt oxide supported gold nanoparticles as a stable and readily-prepared precursor for the in situ generation of cobalt carbonyl like species. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.09.067] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
36
|
Jakubec P, Kyle AF, Calleja J, Dixon DJ. Total synthesis of (−)-nakadomarin A: alkyne ring-closing metathesis. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.09.016] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
37
|
Inagaki F. [Intramolecular cyclization reaction of multiple bonds and its application]. YAKUGAKU ZASSHI 2011; 131:1437-43. [PMID: 21963970 DOI: 10.1248/yakushi.131.1437] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The cycloaddition and cycloisomerization of the allene with an alkyne, alkene, or an additional allene for construction of various monocyclic and bicyclic ring systems has been developed. The characteristic features of these methods using allene functionality instead of a simple alkene or alkyne include the reaction mode that originated from the double function as well as the high efficiency for the constructions of medium-sized rings. Furthermore, asymmetric formal synthesis of (+)-nakadomarin A and total synthesis of (+)-fawcettimine and (+)-lycoposerramine-B based on highly stereoselective Pauson-Khand reaction of alkene-alkynes were completed.
Collapse
Affiliation(s)
- Fuyuhiko Inagaki
- Division of Pharmaceutical Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Japan.
| |
Collapse
|
38
|
Cheng B, Wu F, Yang X, Zhou Y, Wan X, Zhai H. Efficient total synthesis of marine alkaloid (-)-nakadomarin A. Chemistry 2011; 17:12569-72. [PMID: 21956824 DOI: 10.1002/chem.201102101] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Indexed: 11/05/2022]
Affiliation(s)
- Bin Cheng
- Hefei National Laboratory for Physical Science at Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, P.R. China
| | | | | | | | | | | |
Collapse
|
39
|
Kyle AF, Jakubec P, Cockfield DM, Cleator E, Skidmore J, Dixon DJ. Total synthesis of (-)-nakadomarin A. Chem Commun (Camb) 2011; 47:10037-9. [PMID: 21826301 DOI: 10.1039/c1cc13665h] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly diastereoselective bifunctional organocatalyst controlled Michael addition, a nitro-Mannich/lactamization cascade, a furan N-acyliminium cyclisation, a sequential alkyne RCM/syn-reduction and an alkene RCM has allowed a 19 step, highly stereoselective synthesis of (-)-nakadomarin A.
Collapse
Affiliation(s)
- Andrew F Kyle
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, United Kingdom
| | | | | | | | | | | |
Collapse
|
40
|
Inagaki F, Itoh N, Hayashi Y, Matsui Y, Mukai C. Rh(I)-catalyzed intramolecular [2 + 2 + 1] cycloaddition of allenenes: Construction of bicyclo[4.3.0]nonenones with an angular methyl group and tricyclo[6.4.0.0]dodecenone. Beilstein J Org Chem 2011; 7:404-9. [PMID: 21512593 PMCID: PMC3079109 DOI: 10.3762/bjoc.7.52] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Accepted: 03/16/2011] [Indexed: 11/29/2022] Open
Abstract
The [RhCl(CO)dppp]2-catalyzed intramolecular carbonylative [2 + 2 + 1] cycloaddition of allenenes was developed to prepare bicyclo[4.3.0]nonenones possessing a methyl group at the ring junction, which is difficult to achieve by the Pauson–Khand reaction of the corresponding enynes. This method also provided a new procedure for the construction of the tricyclo[6.4.0.01,5]dodecenone framework in a satisfactory yield.
Collapse
Affiliation(s)
- Fuyuhiko Inagaki
- Division of Pharmaceutical Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | | | | | | | | |
Collapse
|
41
|
Haimowitz T, Fitzgerald ME, Winkler JD. STUDIES DIRECTED TOWARD THE SYNTHESIS OF NAKADOMARIN A. Tetrahedron Lett 2011; 52:2162-2164. [PMID: 22013283 DOI: 10.1016/j.tetlet.2010.11.134] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The application of a Pummerer-initiated tandem reaction cascade leads to the highly stereoselective formation of the tetracyclic core of Nakadomarin A.
Collapse
Affiliation(s)
- Thomas Haimowitz
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104
| | | | | |
Collapse
|
42
|
Affiliation(s)
- Yujiro Hayashi
- Division of Pharmaceutical Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Fuyuhiko Inagaki
- Division of Pharmaceutical Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Chisato Mukai
- Division of Pharmaceutical Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| |
Collapse
|
43
|
Ji Y, Riera A, Verdaguer X. Saline Intermolecular Pauson-Khand Reactions of Propargyl Amine. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001617] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
44
|
Abstract
A concise diastereoselective total synthesis of (-)-nakadomarin A has been completed in 21 steps from D-pyroglutamic acid. Key steps include an enecarbamate Michael addition/furan-N-acyliminium ion cascade cyclization to provide the tetracyclic core and ring-closing alkyne and alkene metatheses to construct the fifteen- and eight-membered azacycles, respectively.
Collapse
Affiliation(s)
- Mark G. Nilson
- Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802
| | - Raymond L. Funk
- Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802
| |
Collapse
|