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Zhao H, Luo Z, Yang J, Li B, Han J, Xu L, Lai W, Walsh PJ. Ligand‐Promoted Rh
I
‐Catalyzed C2‐Selective C−H Alkenylation and Polyenylation of Imidazoles with Alkenyl Carboxylic Acids. Chemistry 2022; 28:e202200441. [DOI: 10.1002/chem.202200441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Haoqiang Zhao
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
- Roy and Diana Vagelos Laboratories Penn/Merck Laboratory for High-Throughput Experimentation Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA 19104-6323 USA
- Department of Chemistry School of Chinese Pharmacy Beijing University of Chinese Medicine Beijing 102488 P. R. China
| | - Zhenli Luo
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Ji Yang
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Bohan Li
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Jiahong Han
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Lijin Xu
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Wenzhen Lai
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories Penn/Merck Laboratory for High-Throughput Experimentation Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA 19104-6323 USA
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2
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Chen Z, Yuan W. N-Cyanation of Primary and Secondary Amines with Cyanobenzio-doxolone (CBX) Reagent. Chemistry 2021; 27:14836-14840. [PMID: 34390036 DOI: 10.1002/chem.202102354] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Indexed: 01/11/2023]
Abstract
An efficient electrophilic N-cyanation of amines with a stable and less-toxic cyanobenziodoxole reagent towards the synthesis of cyanamides is disclosed. This synthetically practicable strategy allows the construction of a wide variety of cyanamides under very mild and simple conditions with a broad functional group compatibility, and showcases a huge potential in late-stage modification of complex molecules.
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Affiliation(s)
- Zimin Chen
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica Hubei Key Laboratory of Materials Chemistry and Service Failure School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, P. R. China
| | - Weiming Yuan
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica Hubei Key Laboratory of Materials Chemistry and Service Failure School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, P. R. China
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3
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Volkova Y, Baranin S, Zavarzin I. A
3
Coupling Reaction in the Synthesis of Heterocyclic Compounds. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000866] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Yulia Volkova
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky prosp. Moscow 119991
| | - Sergey Baranin
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky prosp. Moscow 119991
| | - Igor Zavarzin
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky prosp. Moscow 119991
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4
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Sabbasani VR, Wang K, Streeter MD, Spiegel DA. One‐Step Synthesis of 2,5‐Diaminoimidazoles and Total Synthesis of Methylglyoxal‐Derived Imidazolium Crosslink (MODIC). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201911156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Venkata R. Sabbasani
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06511 USA
| | - Kung‐Pern Wang
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06511 USA
| | - Matthew D. Streeter
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06511 USA
| | - David A. Spiegel
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06511 USA
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5
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Sabbasani VR, Wang K, Streeter MD, Spiegel DA. One-Step Synthesis of 2,5-Diaminoimidazoles and Total Synthesis of Methylglyoxal-Derived Imidazolium Crosslink (MODIC). Angew Chem Int Ed Engl 2019; 58:18913-18917. [PMID: 31713976 PMCID: PMC6973230 DOI: 10.1002/anie.201911156] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Indexed: 01/28/2023]
Abstract
Here we describe a general method for the synthesis of 2,5-diaminoimidazoles, which involves a thermal reaction between α-aminoketones and substituted guanylhydrazines without the need for additives. As one of the few known ways to access the 2,5-diaminoimidazole motif, our method greatly expands the number of reported diaminoimidazoles and further supports our previous observations that these compounds spontaneously adopt the non-aromatic 4(H) tautomer. The reaction works successfully on both cyclic and acyclic amino ketone starting materials, as well as a range of substituted guanylhydrazines. Following optimization, the method was applied to the efficient synthesis of the advanced glycation end product (AGE) methylglyoxal-derived imidazolium crosslink (MODIC). We expect that this method will enable rapid access to a variety of biologically important 2,5-diaminoimidazole-containing products.
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Affiliation(s)
| | - Kung‐Pern Wang
- Department of ChemistryYale University225 Prospect StreetNew HavenCT06511USA
| | - Matthew D. Streeter
- Department of ChemistryYale University225 Prospect StreetNew HavenCT06511USA
| | - David A. Spiegel
- Department of ChemistryYale University225 Prospect StreetNew HavenCT06511USA
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6
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Rossi R, Angelici G, Casotti G, Manzini C, Lessi M. Catalytic Synthesis of 1,2,4,5‐Tetrasubstituted 1
H
‐Imidazole Derivatives: State of the Art. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801381] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Renzo Rossi
- Dipartimento di Chimica e Chimica IndustrialeUniversity of Pisa via G. Moruzzi 13 56124 Pisa Italy
| | - Gaetano Angelici
- Dipartimento di Chimica e Chimica IndustrialeUniversity of Pisa via G. Moruzzi 13 56124 Pisa Italy
| | - Gianluca Casotti
- Dipartimento di Chimica e Chimica IndustrialeUniversity of Pisa via G. Moruzzi 13 56124 Pisa Italy
| | - Chiara Manzini
- Dipartimento di Chimica e Chimica IndustrialeUniversity of Pisa via G. Moruzzi 13 56124 Pisa Italy
| | - Marco Lessi
- Dipartimento di Chimica e Chimica IndustrialeUniversity of Pisa via G. Moruzzi 13 56124 Pisa Italy
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7
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Chen X, Wang Z, Huang H, Deng GJ. Elemental Sulfur-Promoted Aerobic Cyclization of Ketones and Aliphatic Amines for Synthesis of Tetrasubstituted Imidazoles. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800765] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xiangui Chen
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan 411105 China
| | - Zhen Wang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan 411105 China
| | - Huawen Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan 411105 China
| | - Guo-Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan 411105 China
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8
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Modulation of the Substitution Pattern of 5-Aryl-2-Aminoimidazoles Allows Fine-Tuning of Their Antibiofilm Activity Spectrum and Toxicity. Antimicrob Agents Chemother 2016; 60:6483-6497. [PMID: 27550355 PMCID: PMC5075052 DOI: 10.1128/aac.00035-16] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 08/01/2016] [Indexed: 12/17/2022] Open
Abstract
We previously synthesized several series of compounds, based on the 5-aryl-2-aminoimidazole scaffold, that showed activity preventing the formation of Salmonella enterica serovar Typhimurium and Pseudomonas aeruginosa biofilms. Here, we further studied the activity spectrum of a number of the most active N1- and 2N-substituted 5-aryl-2-aminoimidazoles against a broad panel of biofilms formed by monospecies and mixed species of bacteria and fungi. An N1-substituted compound showed very strong activity against the biofilms formed by Gram-negative and Gram-positive bacteria and the fungus Candida albicans but was previously shown to be toxic against various eukaryotic cell lines. In contrast, 2N-substituted compounds were nontoxic and active against biofilms formed by Gram-negative bacteria and C. albicans but had reduced activity against biofilms formed by Gram-positive bacteria. In an attempt to develop nontoxic compounds with potent activity against biofilms formed by Gram-positive bacteria for application in antibiofilm coatings for medical implants, we synthesized novel compounds with substituents at both the N1 and 2N positions and tested these compounds for antibiofilm activity and toxicity. Interestingly, most of these N1-,2N-disubstituted 5-aryl-2-aminoimidazoles showed very strong activity against biofilms formed by Gram-positive bacteria and C. albicans in various setups with biofilms formed by monospecies and mixed species but lost activity against biofilms formed by Gram-negative bacteria. In light of application of these compounds as anti-infective coatings on orthopedic implants, toxicity against two bone cell lines and the functionality of these cells were tested. The N1-,2N-disubstituted 5-aryl-2-aminoimidazoles in general did not affect the viability of bone cells and even induced calcium deposition. This indicates that modulating the substitution pattern on positions N1 and 2N of the 5-aryl-2-aminoimidazole scaffold allows fine-tuning of both the antibiofilm activity spectrum and toxicity.
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Switchable [3+2] and [4+2] Heteroannulation of Primary Propargylamines with Isonitriles to Imidazoles and 1,6-Dihydropyrimidines: Catalyst Loading Enabled Reaction Divergence. Chemistry 2016; 22:8332-8. [DOI: 10.1002/chem.201601560] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Indexed: 11/07/2022]
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10
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Schmidt NG, Simon RC, Kroutil W. Biocatalytic Asymmetric Synthesis of Optically Pure Aromatic Propargylic Amines Employing ω-Transaminases. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500086] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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11
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Tuning the Reactivity of Isocyano Group: Synthesis of Imidazoles and Imidazoliums from Propargylamines and Isonitriles in the Presence of Multiple Catalysts. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201410113] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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12
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Tong S, Wang Q, Wang MX, Zhu J. Tuning the Reactivity of Isocyano Group: Synthesis of Imidazoles and Imidazoliums from Propargylamines and Isonitriles in the Presence of Multiple Catalysts. Angew Chem Int Ed Engl 2014; 54:1293-7. [DOI: 10.1002/anie.201410113] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Indexed: 01/25/2023]
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13
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Kwon KH, Serrano CM, Koch M, Barrows LR, Looper RE. Synthesis of bicyclic guanidines via cascade hydroamination/Michael additions of mono-N-acryloylpropargylguanidines. Org Lett 2014; 16:6048-51. [PMID: 25393831 PMCID: PMC4260634 DOI: 10.1021/ol502691w] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A cascade silver(I)-catalyzed hydroamination/Michael addition sequence has been developed to deliver highly substituted bicyclic guanidines. This transformation gives rise to geometrically and constitutionally stable ene-guanidines and generates a remote stereocenter with moderate to high diastereoselectivity.
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Affiliation(s)
- Ki-Hyeok Kwon
- †Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Catherine M Serrano
- †Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Michael Koch
- ‡Department of Pharmacy/Toxicology, University of Utah, 30 South 2000 East, Salt Lake City, Utah 84112 United States
| | - Louis R Barrows
- ‡Department of Pharmacy/Toxicology, University of Utah, 30 South 2000 East, Salt Lake City, Utah 84112 United States
| | - Ryan E Looper
- †Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
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14
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Pan Z, Pound SM, Rondla NR, Douglas CJ. Intramolecular aminocyanation of alkenes by N-CN bond cleavage. Angew Chem Int Ed Engl 2014; 53:5170-4. [PMID: 24719371 PMCID: PMC4077192 DOI: 10.1002/anie.201310983] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 02/06/2014] [Indexed: 11/06/2022]
Abstract
A metal-free, Lewis acid promoted intramolecular aminocyanation of alkenes was developed. B(C6F5)3 activates N-sulfonyl cyanamides, thus leading to a formal cleavage of the N-CN bonds in conjunction with vicinal addition of sulfonamide and nitrile groups across an alkene. This method enables atom-economical access to indolines and tetrahydroquinolines in excellent yields, and provides a complementary strategy for regioselective alkene difunctionalizations with sulfonamide and nitrile groups. Labeling experiments with (13)C suggest a fully intramolecular cyclization pattern due to the lack of label scrambling in double crossover experiments. Catalysis with Lewis acid is realized and the reaction can be conducted under air.
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Affiliation(s)
- Zhongda Pan
- Department of Chemistry, University of Minnesota – Twin Cities, 207 Pleasant St. SE, Minneapolis, MN 55455 (USA)
| | - Sarah M. Pound
- Department of Chemistry, University of Minnesota – Twin Cities, 207 Pleasant St. SE, Minneapolis, MN 55455 (USA)
| | - Naveen R. Rondla
- Department of Chemistry, University of Minnesota – Twin Cities, 207 Pleasant St. SE, Minneapolis, MN 55455 (USA)
| | - Christopher J. Douglas
- Department of Chemistry, University of Minnesota – Twin Cities, 207 Pleasant St. SE, Minneapolis, MN 55455 (USA)
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15
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Abstract
The paralytic agent (+)-saxitoxin (STX), most commonly associated with oceanic red tides and shellfish poisoning, is a potent inhibitor of electrical conduction in cells. Its nefarious effects result from inhibition of voltage-gated sodium channels (Na(V)s), the obligatory proteins responsible for the initiation and propagation of action potentials. In the annals of ion channel research, the identification and characterization of Na(V)s trace to the availability of STX and an allied guanidinium derivative, tetrodotoxin. The mystique of STX is expressed in both its function and form, as this uniquely compact dication boasts more heteroatoms than carbon centers. This Review highlights both the chemistry and chemical biology of this fascinating natural product, and offers a perspective as to how molecular design and synthesis may be used to explore Na(V) structure and function.
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Affiliation(s)
- Arun P Thottumkara
- Department of Chemistry, Stanford University, Stanford, CA 94305-5080 (USA)
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17
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Pan Z, Pound SM, Rondla NR, Douglas CJ. Intramolecular Aminocyanation of Alkenes by NCN Bond Cleavage. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310983] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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18
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Synthesis of trisubstituted imidazoles via a convergent reaction network from methyl ketones and benzoins. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.11.080] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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19
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Huang H, Ji X, Wu W, Jiang H. Practical Synthesis of Polysubstituted ImidazolesviaIodine- Catalyzed Aerobic Oxidative Cyclization of Aryl Ketones and Benzylamines. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201200582] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Jia-Jie W, Zhu Y, Zhan ZP. The Synthesis of Aromatic Heterocycles from Propargylic Compounds. ASIAN J ORG CHEM 2012. [DOI: 10.1002/ajoc.201200053] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Abstract
A concise stereoselective total synthesis of (+)-saxitoxin is described. A silver(I)-initiated hydroamination cascade constructs the bicyclic guanidinium ion core from a alkynyl bisguanidine. This sequence creates two C-N bonds, one C-O bond, and three rings and forms a single stereoisomer in a single synthetic transformation. This process enabled us to complete the synthesis of (+)-saxitoxin in 14 steps from N-Boc-l-serine methyl ester.
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Affiliation(s)
- Vasudev R Bhonde
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
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22
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Albrecht Ł, Ransborg LK, Albrecht A, Lykke L, Jørgensen KA. Organocatalytic Strategies for the Construction of Optically Active Imidazoles, Oxazoles, and Thiazoles. Chemistry 2011; 17:13240-6. [DOI: 10.1002/chem.201101817] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Indexed: 11/08/2022]
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Feng H, Ermolat'ev DS, Song G, Van der Eycken EV. Microwave-assisted decarboxylative three-component coupling of a 2-oxoacetic acid, an amine, and an alkyne. J Org Chem 2011; 76:7608-13. [PMID: 21823621 DOI: 10.1021/jo2013725] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel and efficient microwave-assisted decarboxylative three-component coupling of a 2-oxoacetic acid, an amine, and an alkyne (OA(2)-coulpling) has been developed. This new multicomponent coupling constitutes an efficient approach for the synthesis of polysubstituted propargylamines in the presence of a catalytic amount of copper(I) catalyst.
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Affiliation(s)
- Huangdi Feng
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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Ermolat'ev DS, Bariwal JB, Steenackers HPL, De Keersmaecker SCJ, Van der Eycken EV. Concise and diversity-oriented route toward polysubstituted 2-aminoimidazole alkaloids and their analogues. Angew Chem Int Ed Engl 2011; 49:9465-8. [PMID: 20963737 DOI: 10.1002/anie.201004256] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Denis S Ermolat'ev
- Laboratory for Organic and Microwave-Assisted Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
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Gainer MJ, Bennett NR, Takahashi Y, Looper RE. Regioselective rhodium(II)-catalyzed hydroaminations of propargylguanidines. Angew Chem Int Ed Engl 2010; 50:684-7. [PMID: 21226153 DOI: 10.1002/anie.201006087] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Indexed: 11/11/2022]
Affiliation(s)
- Morgan J Gainer
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT 84112, USA
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Gainer MJ, Bennett NR, Takahashi Y, Looper RE. Regioselective Rhodium(II)-Catalyzed Hydroaminations of Propargylguanidines. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201006087] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Grishina AA, Polyakova SM, Kunetskiy RA, Císařová I, Lyapkalo IM. 4,5-Disubstituted N,N′-Di-tert-alkyl Imidazolium Salts: New Synthesis and Structural Features. Chemistry 2010; 17:96-100. [PMID: 21207605 DOI: 10.1002/chem.201002805] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Indexed: 11/09/2022]
Affiliation(s)
- Anastasia A Grishina
- Institute of Organic Chemistry and Biochemistry Academy of Sciences of the Czech Republic, v. v. i., Flemingovo nam. 2, 16610 Prague 6, Czech Republic
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Ermolat'ev DS, Bariwal JB, Steenackers HPL, De Keersmaecker SCJ, Van der Eycken EV. Concise and Diversity-Oriented Route toward Polysubstituted 2-Aminoimidazole Alkaloids and Their Analogues. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201004256] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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29
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Larraufie MH, Ollivier C, Fensterbank L, Malacria M, Lacôte E. Radical Synthesis of Guanidines fromN-Acyl Cyanamides. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200907237] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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30
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Larraufie MH, Ollivier C, Fensterbank L, Malacria M, Lacôte E. Radical Synthesis of Guanidines fromN-Acyl Cyanamides. Angew Chem Int Ed Engl 2010; 49:2178-81. [DOI: 10.1002/anie.200907237] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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Bariwal J, Ermolat'ev D, Van der Eycken E. Efficient Microwave-Assisted Synthesis of Secondary Alkylpropargylamines by Using A3-Coupling with Primary Aliphatic Amines. Chemistry 2010; 16:3281-4. [DOI: 10.1002/chem.200903143] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Rizk T, Bilodeau EF, Beauchemin A. Synthesis of Pyridines and Pyrazines Using an Intramolecular Hydroamination-Based Reaction Sequence. Angew Chem Int Ed Engl 2009; 48:8325-7. [DOI: 10.1002/anie.200903922] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Rizk T, Bilodeau EF, Beauchemin A. Synthesis of Pyridines and Pyrazines Using an Intramolecular Hydroamination-Based Reaction Sequence. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200903922] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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