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Fouad MA, Abdel-Hamid H, Ayoup MS. Two decades of recent advances of Ugi reactions: synthetic and pharmaceutical applications. RSC Adv 2020; 10:42644-42681. [PMID: 35514898 PMCID: PMC9058431 DOI: 10.1039/d0ra07501a] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 10/24/2020] [Indexed: 12/30/2022] Open
Abstract
Multicomponent reactions (MCRs) are powerful synthetic tools in which more than two starting materials couple with each other to form multi-functionalized compounds in a one-pot process, the so-called “tandem”, “domino” or “cascade” reaction, or utilizing an additional step without changing the solvent, the so-called a sequential-addition procedure, to limit the number of synthetic steps, while increasing the complexity and the molecular diversity, which are highly step-economical reactions. The Ugi reaction, one of the most common multicomponent reactions, has recently fascinated chemists with the high diversity brought by its four- or three-component-based isonitrile. The Ugi reaction has been introduced in organic synthesis as a novel, efficient and useful tool for the preparation of libraries of multifunctional peptides, natural products, and heterocyclic compounds with stereochemistry control. In this review, we highlight the recent advances of the Ugi reaction in the last two decades from 2000–2019, mainly in the synthesis of linear or cyclic peptides, heterocyclic compounds with versatile ring sizes, and natural products, as well as the enantioselective Ugi reactions. Meanwhile, the applications of these compounds in pharmaceutical trials are also discussed. We highlight the recent advances of the Ugi reaction in the last two decades from 2000–2019, mainly in the synthesis of linear or cyclic peptides, heterocyclic compounds with versatile ring sizes, and natural products, as well as the enantioselective Ugi reactions.![]()
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Affiliation(s)
- Manar Ahmed Fouad
- Department of Chemistry
- Faculty of Science
- Alexandria University
- Alexandria 21321
- Egypt
| | - Hamida Abdel-Hamid
- Department of Chemistry
- Faculty of Science
- Alexandria University
- Alexandria 21321
- Egypt
| | - Mohammed Salah Ayoup
- Department of Chemistry
- Faculty of Science
- Alexandria University
- Alexandria 21321
- Egypt
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Melanson JA, Figliola C, Smithen DA, Kajetanowicz AK, Thompson A. Probing the hydrolytic reactivity of 2-difluoromethyl pyrroles. Org Biomol Chem 2018; 15:144-152. [PMID: 27841887 DOI: 10.1039/c6ob01441k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
α-Difluoromethyl pyrroles were found to be stable while N-protected with an electron-withdrawing group. Due to the propensity of pyrroles to access azafulvenium-like intermediates, the C-F bonds of an α-difluoromethyl substituent are labile under hydrolytic conditions. The presence of certain electron-withdrawing substituents about the pyrrolic ring can accelerate this process, as determined through a kinetic comparison of the deprotection and subsequent hydrolysis reactions of N-protected β-aryl α-difluoromethyl pyrroles.
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Affiliation(s)
- Jennifer A Melanson
- Department of Chemistry, Dalhousie University, P.O. Box 15000, Halifax, NS B3H 4R2, Canada.
| | - Carlotta Figliola
- Department of Chemistry, Dalhousie University, P.O. Box 15000, Halifax, NS B3H 4R2, Canada.
| | - Deborah A Smithen
- Department of Chemistry, Dalhousie University, P.O. Box 15000, Halifax, NS B3H 4R2, Canada.
| | | | - Alison Thompson
- Department of Chemistry, Dalhousie University, P.O. Box 15000, Halifax, NS B3H 4R2, Canada.
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Gegenhuber T, Schenzel AM, Goldmann AS, Zetterlund PB, Barner-Kowollik C. A facile route to segmented copolymers by fusing ambient temperature step-growth and RAFT polymerization. Chem Commun (Camb) 2017; 53:10648-10651. [PMID: 28902196 DOI: 10.1039/c7cc06347d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We introduce the facile synthesis of segmented copolymers by a catalyst-free Diels-Alder (DA) reaction at ambient temperature via step-growth and subsequent reversible addition fragmentation chain transfer (RAFT) polymerization. High molecular weight step-growth polymers are readily obtained (Mw = 40 000 g mol-1), featuring trithiocarbonate moieties in their chain, which allow monomer insertion via RAFT polymerization yielding high molecular weight species.
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Affiliation(s)
- Thomas Gegenhuber
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia.
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Huang J, Du X, Van Hecke K, Van der Eycken EV, Pereshivko OP, Peshkov VA. Ugi Reaction Followed by Intramolecular Diels-Alder Reaction and Elimination of HCl: One-Pot Approach to Arene-Fused Isoindolinones. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700747] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jianjun Huang
- College of Chemistry; Chemical Engineering and Materials Science; Soochow University; Dushu Lake Campus 215123 Suzhou China
| | - Xiaochen Du
- College of Chemistry; Chemical Engineering and Materials Science; Soochow University; Dushu Lake Campus 215123 Suzhou China
| | - Kristof Van Hecke
- XStruct; Department of Inorganic and Physical Chemistry; Ghent University; Krijgslaan 281-S3 9000 Ghent Belgium
| | - Erik V. Van der Eycken
- Laboratory for Organic and Microwave-Assisted Chemistry (LOMAC); Department of Chemistry; University of Leuven (KU Leuven); Celestijnenlaan 200F 3001 Leuven Belgium
- Peoples Friendship University of Russia (RUDN University); 6 Miklukho-Maklaya street 117198 Moscow Russia
| | - Olga P. Pereshivko
- College of Chemistry; Chemical Engineering and Materials Science; Soochow University; Dushu Lake Campus 215123 Suzhou China
| | - Vsevolod A. Peshkov
- College of Chemistry; Chemical Engineering and Materials Science; Soochow University; Dushu Lake Campus 215123 Suzhou China
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A ring closing metathesis-manganese dioxide oxidation sequence for the synthesis of substituted pyrroles. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.03.088] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Kajanus J, Jacobson I, Åstrand A, Olsson RI, Gran U, Björe A, Fjellström O, Davidsson Ö, Emtenäs H, Dahlén A, Löfberg B, Yuan ZQ, Sundell J, Cassel J, Gyll J, Iliefski T, Högberg Å, Lindhardt E, Malmberg J. Isoindolinone compounds active as Kv1.5 blockers identified using a multicomponent reaction approach. Bioorg Med Chem Lett 2016; 26:2023-9. [DOI: 10.1016/j.bmcl.2016.02.081] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 02/26/2016] [Accepted: 02/27/2016] [Indexed: 12/19/2022]
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El Kaïm L, Grimaud L. The Ugi-Smiles and Passerini-Smiles Couplings: A Story About Phenols in Isocyanide-Based Multicomponent Reactions. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402783] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Parvatkar PT, Kadam HK, Tilve SG. Intramolecular Diels–Alder reaction as a key step in tandem or sequential processes: a versatile tool for the synthesis of fused and bridged bicyclic or polycyclic compounds. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.02.048] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Temel E, Demircan A, Kandemir MK, Colak M, Büyükgüngör O. (3aR,6S,7aR)-7a-Chloro-2-[(4-nitro-phen-yl)sulfon-yl]-1,2,3,6,7,7a-hexa-hydro-3a,6-ep-oxy-iso-indole. Acta Crystallogr Sect E Struct Rep Online 2013; 69:o1551-2. [PMID: 24098235 PMCID: PMC3790416 DOI: 10.1107/s1600536813025336] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 09/12/2013] [Indexed: 11/11/2022]
Abstract
In the title compound, C14H13ClN2O5S, the chlorine-substituted tetrahydrofuran ring adopts a twist conformation and the other tetrahydrofuran ring an envelope conformation with the O atom as the flap. The pyrrolidine ring adopts a twist conformation. In the crystal, C—H⋯O hydrogen bonds link the molecules into zigzag chains running along the b-axis direction.
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Affiliation(s)
- Ersin Temel
- Ondokuz Mayıs University, Arts and Sciences Faculty, Department of Physics, TR-55139 Samsun, Turkey
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Sehlinger A, Kreye O, Meier MAR. Tunable Polymers Obtained from Passerini Multicomponent Reaction Derived Acrylate Monomers. Macromolecules 2013. [DOI: 10.1021/ma401125j] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ansgar Sehlinger
- Laboratory of Applied Chemistry, Institute of Organic
Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| | - Oliver Kreye
- Laboratory of Applied Chemistry, Institute of Organic
Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| | - Michael A. R. Meier
- Laboratory of Applied Chemistry, Institute of Organic
Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
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12
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Cai Q, Zhu YP, Gao Y, Sun JJ, Wu AX. A direct method for the synthesis of indolizine derivatives from easily available aromatic ketones, pyridines, and acrylonitrile derivatives. CAN J CHEM 2013. [DOI: 10.1139/cjc-2012-0534] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A concise and efficient strategy has been proposed to synthesize indolizine derivatives from easily available aryl or heteroaryl methyl ketones, pyridines, and acrylonitriles. The mechanistic pathway involved the integration of iodination, pyridinium ylide synthesis, and 1,3-dipolar cycloaddition. The protocols were found to be highly efficient in terms of high yields, operational simplicity, mild reaction conditions, and easy workup. This method has provided an important supplement for the synthesis of indolizine derivatives via a novel tandem synthesis.
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Affiliation(s)
- Qun Cai
- The Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Yan-Ping Zhu
- The Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Yang Gao
- The Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Jing-Jing Sun
- The Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - An-Xin Wu
- The Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
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van Berkel SS, Bögels BGM, Wijdeven MA, Westermann B, Rutjes FPJT. Recent Advances in Asymmetric Isocyanide-Based Multicomponent Reactions. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200030] [Citation(s) in RCA: 178] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Islas-Jácome A, González-Zamora E, Gámez-Montaño R. A short microwave-assisted synthesis of tetrahydroisoquinolin-pyrrolopyridinones by a triple process: Ugi-3CR–aza Diels–Alder/S-oxidation/Pummerer. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.07.134] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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15
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Lévesque F, Seeberger PH. Highly efficient continuous flow reactions using singlet oxygen as a "green" reagent. Org Lett 2011; 13:5008-11. [PMID: 21879739 DOI: 10.1021/ol2017643] [Citation(s) in RCA: 162] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Described is a new method for the efficient in situ production of singlet oxygen in a simple continuous flow photochemical reactor. The extremely large interfacial area generated by running the biphasic mixture in a narrow channel at a high flow rate ensures high throughput as well as fast and efficient oxidation of various alkenes, 1,3-dienes, and thioethers on a preparative scale.
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Affiliation(s)
- François Lévesque
- Max Planck Institute of Colloids and Interfaces, Department of Biomolecular Systems, Am Mühlenberg 1, 14476 Potsdam, Germany
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Abstract
A short sequential synthesis of pyrrolidino- pyridines and pyrimidines illustrates the potential of combining Ugi-Smiles couplings with radical tin-free processes.
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17
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Intramolecular Diels–Alder reaction of N-allyl 2-furoyl amides: effect of steric strain and amide rotational isomerism. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.10.139] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Krasavin M, Parchinsky V. Thiophene-containing products of the Ugi reaction in an oxidation-triggered IMDA/aromatization cascade: a simple access to 3-oxoisoindolines. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.07.135] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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19
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Kamimura A, Nakano T. Use of the Diels−Alder Adduct of Pyrrole in Organic Synthesis. Formal Racemic Synthesis of Tamiflu. J Org Chem 2010; 75:3133-6. [PMID: 20364872 DOI: 10.1021/jo1002856] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Akio Kamimura
- Department of Applied Molecular Bioscience, Graduate School of Medicine, Yamaguchi University, Ube 755-8611 Japan
| | - Toshiki Nakano
- Department of Applied Molecular Bioscience, Graduate School of Medicine, Yamaguchi University, Ube 755-8611 Japan
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A Marriage of Convenience: Combining the Power of Isocyanide‐Based Multicomponent Reactions with the Versatility of (Hetero)norbornene Chemistry. European J Org Chem 2010. [DOI: 10.1002/ejoc.200901438] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Banfi L, Basso A, Riva R. Synthesis of Heterocycles Through Classical Ugi and Passerini Reactions Followed by Secondary Transformations Involving One or Two Additional Functional Groups. SYNTHESIS OF HETEROCYCLES VIA MULTICOMPONENT REACTIONS I 2010. [DOI: 10.1007/7081_2009_23] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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22
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Synthesis of substituted fused pyridines, pyrazines and pyrimidines by sequential Ugi/inverse electron demand Diels–Alder transformations. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.07.036] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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23
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Erb W, Neuville L, Zhu J. Ugi-Post Functionalization, from a Single Set of Ugi-Adducts to Two Distinct Heterocycles by Microwave-Assisted Palladium-Catalyzed Cyclizations: Tuning the Reaction Pathways by Ligand Switch. J Org Chem 2009; 74:3109-15. [DOI: 10.1021/jo900210x] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- William Erb
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
| | - Luc Neuville
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
| | - Jieping Zhu
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
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Sureshbabu VV, Narendra N, Nagendra G. Chiral N-Fmoc-β-Amino Alkyl Isonitriles Derived from Amino Acids: First Synthesis and Application in 1-Substituted Tetrazole Synthesis. J Org Chem 2008; 74:153-7. [DOI: 10.1021/jo801527d] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vommina V. Sureshbabu
- Peptide Research Laboratory, Department of Studies in Chemistry, Central College Campus, Bangalore University, Dr. B. R. Ambedkar Veedhi, Bangalore 560 001, India
| | - N. Narendra
- Peptide Research Laboratory, Department of Studies in Chemistry, Central College Campus, Bangalore University, Dr. B. R. Ambedkar Veedhi, Bangalore 560 001, India
| | - G. Nagendra
- Peptide Research Laboratory, Department of Studies in Chemistry, Central College Campus, Bangalore University, Dr. B. R. Ambedkar Veedhi, Bangalore 560 001, India
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25
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Ikoma M, Oikawa M, Sasaki M. Chemospecific Allylation and Domino Metathesis of 7-Oxanorbornenes for Skeletal and Appendage Diversity. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800781] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Kaim LE, Grimaud L, Vieu E. From Simple Ugi Adducts to Indanes and δ-Amidomalonates: New Manganese(III)-Induced Radical Cascades. Org Lett 2007; 9:4171-3. [PMID: 17850154 DOI: 10.1021/ol701678d] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A complete change of the traditional Ugi adducts framework has been obtained using new radical cascades as Ugi post-condensation reactions. Indanes and delta-amidomalonates were thus obtained in a one-pot procedure from aromatic aldehydes under a sequence involving Ugi addition followed by treatment of the adducts with Mn(III) and malonate or beta-ketoester. The radical step probably involves an intramolecular aryl transfer followed by an oxidative cleavage and final cyclization to indanes.
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Affiliation(s)
- Laurent El Kaim
- Laboratoire Chimie et procédés, Ecole Nationale Supérieure de Techniques Avancées, 32 Bd Victor, 75739 Paris Cedex 15, France.
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Bonnaterre F, Bois-Choussy M, Zhu J. Rapid access to oxindoles by the combined use of an Ugi four-component reaction and a microwave-assisted intramolecular Buchwald-Hartwig amidation reaction. Org Lett 2007; 8:4351-4. [PMID: 16956224 DOI: 10.1021/ol061755z] [Citation(s) in RCA: 125] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A two-step sequence involving an Ugi four-component reaction (Ugi-4CR) and a palladium-catalyzed intramolecular amidation of aryl iodide has been developed for rapid access to functionalized oxindole (1). Microwave heating was used to accelerate and to improve the efficiency of the intramolecular Buchwald-Hartwig reaction.
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Affiliation(s)
- Florence Bonnaterre
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
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Abstract
Sequential transformations enable the facile synthesis of complex target molecules from simple building blocks in a single preparative step. Their value is amplified if they also create multiple stereogenic centers. In the ongoing search for new domino processes, emphasis is usually placed on sequential reactions which occur cleanly and without forming by-products. As a prerequisite for an ideally proceeding one-pot sequential transformation, the reactivity pattern of all participating components has to be such that each building block gets involved in a reaction only when it is supposed to do so. The development of sequences that combine transformations of fundamentally different mechanisms broadens the scope of such procedures in synthetic chemistry. This mini review contains a representative sampling from the last 15 years on the kinds of reactions that have been sequenced into cascades to produce heterocyclic molecules.
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Affiliation(s)
- Albert Padwa
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA 30322
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Bur SK, Padwa A. The Synthesis of Heterocycles Using Cascade Chemistry. ADVANCES IN HETEROCYCLIC CHEMISTRY VOLUME 94 2007. [DOI: 10.1016/s0065-2725(06)94001-x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Kaïm LE, Grimaud L, Miranda LD, Vieu E. Ugi/xanthate cyclizations as a radical route to lactam scaffolds. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.09.123] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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32
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Microwave-assisted one-pot U-4CR and intramolecular O-alkylation toward heterocyclic scaffolds. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.05.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Dömling A. Recent developments in isocyanide based multicomponent reactions in applied chemistry. Chem Rev 2006; 106:17-89. [PMID: 16402771 DOI: 10.1021/cr0505728] [Citation(s) in RCA: 3390] [Impact Index Per Article: 188.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lu K, Luo T, Xiang Z, You Z, Fathi R, Chen J, Yang Z. A concise and diversity-oriented strategy for the synthesis of benzofurans and indoles via Ugi and Diels-Alder reactions. ACTA ACUST UNITED AC 2006; 7:958-67. [PMID: 16283808 DOI: 10.1021/cc050099b] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A one-pot synthesis of diverse benzofurans and indoles from readily available starting materials was achieved via the sequential Ugi four-component reaction, intramolecular Diels-Alder reaction, and oxidative aromatization.
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Affiliation(s)
- Kui Lu
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Science, Peking University, Beijing, China
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Dondoni A, Massi A, Sabbatini S. Multiple Component Approaches to C-Glycosyl β-Amino Acids by Complementary One-Pot Mannich-Type and Reformatsky-Type Reactions. Chemistry 2005; 11:7110-25. [PMID: 16224807 DOI: 10.1002/chem.200500823] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The development of new methods for the preparation of C-glycosyl beta-amino acid libraries with chemical and stereochemical diversity levels was investigated and the results are described herein. Two complementary one-pot three-component Mannich-type and Reformatsky-type synthetic strategies have been developed for the construction of chiral 3-amino propanoate fragments (eventually bis-substituted at C-2) directly linked to the anomeric carbon of pyranose and furanose residues. Both methods involved as the initial step the coupling of a sugar aldehyde to p-methoxybenzylamine but differed in the nucleophile (a d(2) synthon equivalent) which was successively added: a ketene silyl acetal (Mannich route) or a bromozinc enolate (Reformatsky route). Individual C-glycosyl beta-amino esters were isolated as single 3R diastereoisomers in fair to excellent yield (60-90%) and their structure assigned by NMR spectroscopy (Riguera protocol) supported by X-ray crystallography. A tentative explanation of the observed stereochemical outcome based on transition-state models is provided. A preliminary study on the synthesis of alpha,alpha-difluoro C-glycosyl beta-amino acids via a more traditional Reformatsky route is also reported.
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Affiliation(s)
- Alessandro Dondoni
- Laboratorio di Chimica Organica, Dipartimento di Chimica, Università di Ferrara, Via L. Borsari 46, 44100 Ferrara, Italy.
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Fayol A, Zhu J. Multicomponent synthesis of epoxy-tetrahydronaphthyridine and structural diversification by subsequent fragmentation. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.09.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Oikawa M, Ikoma M, Sasaki M. Simultaneous accumulation of both skeletal and appendage-based diversities on tandem Ugi/Diels–Alder products. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.06.147] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
The introduction of high-throughput synthesis and combinatorial chemistry has precipitated a global decline in the screening of natural products by the pharmaceutical industry. Some companies terminated their natural products program, despite the unproven success of the new technologies. This was a premature decision, as natural products have a long history of providing important medicinal agents. Furthermore, they occupy a complementary region of chemical space compared with the typical synthetic compound library. For these reasons, the interest in natural products has been rekindled. Various approaches have evolved that combine the power of natural products and organic chemistry, ranging from the combinatorial total synthesis of analogues to the exploration of natural product scaffolds and the design of completely unnatural molecules that resemble natural products in their molecular characteristics.
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Parallel synthesis of tandem Ugi/Diels–Alder reaction products on a soluble polymer support directed toward split-pool realization of a small molecule library. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2004.11.115] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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