Academic literature on the topic 'Diels-Alder'

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Journal articles on the topic "Diels-Alder"

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Cai, Quan, Xu-Ge Si, and Zhi-Mao Zhang. "Asymmetric Inverse-Electron-Demand Diels–Alder Reactions of 2-Pyrones by Lewis Acid Catalysis." Synlett 32, no. 10 (January 24, 2021): 947–54. http://dx.doi.org/10.1055/a-1371-4391.

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AbstractDiels–Alder reactions of 2-pyrones with alkenes can provide highly functionalized [2,2,2]-bicyclic lactones under mild reaction conditions. Synthetic utilizations of these reactions have been well demonstrated in natural-product synthesis. Although several catalytic asymmetric strategies have been realized, current research in this area is still largely underdeveloped. Recent advances in enantioselective inverse-electron-demand Diels–Alder reactions with Lewis acid catalysis are reviewed.1 Introduction2 State of the Art of Enantioselective Diels–Alder Reactions of 2-Pyrones by Lewis Acid Catalysis3 Enantioselective Synthesis of Arene cis-Dihydrodiols by Diels–­Alder/Retro-Diels–Alder Reactions of 2-Pyrones4 Enantioselective Synthesis of cis-Decalin Derivatives by Diels–­Alder Reactions of 2-Pyrones5 Conclusions
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Han, Jianguang, Alexander Jones, and Xiaoguang Lei. "Recent Advances in the Total Synthesis of Prenylflavonoid and Related Diels–Alder Natural Products." Synthesis 47, no. 11 (April 13, 2015): 1519–33. http://dx.doi.org/10.1055/s-0034-1378696.

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This review summarizes the application of different strategies for the key Diels–Alder cycloaddition in prenylflavonoid and related Diels–Alder natural products synthesis, highlighting the application of novel methodologies and innovative strategies in the synthesis of these natural products and their analogues.1 Introduction2 Classical Conditions for the Diels–Alder Cycloaddition2.1 Thermal Promotion2.2 High-Pressure Promotion2.3 Brønsted Acid Catalysis3 Modern Approaches to the Diels–Alder Cycloaddition3.1 Electron-Transfer Initiation3.2 Silver-Nanoparticle Catalysis3.3 Chiral-Boron-Complex Promotion4 Conclusion
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Cain, David, Calum McLaughlin, John Molloy, Cameron Carpenter-Warren, Niall Anderson, and Allan Watson. "A Cascade Suzuki–Miyaura/Diels–Alder Protocol: Exploring the Bifunctional Utility of Vinyl Bpin." Synlett 30, no. 07 (October 24, 2018): 787–91. http://dx.doi.org/10.1055/s-0037-1611228.

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Cascade reactions are an important strategy in reaction ­design, allowing streamlining of chemical synthesis. Here we report a cascade Suzuki–Miyaura/Diels–Alder reaction, employing vinyl Bpin as a bifunctional reagent in two distinct roles: as an organoboron nucleo­phile for cross-coupling and as a Diels–Alder dienophile. Merging these two reactions enables a rapid and operationally simple synthesis of functionalized carbocycles in good yield. The effect of the organoboron subtype on Diels–Alder regioselectivity was investigated and postsynthetic modifications were carried out on a model substrate. The potential for a complementary Heck/Diels–Alder process was also assessed.
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Cao, Min-Hui, Nicholas J. Green, and Sheng-Zhen Xu. "Application of the aza-Diels–Alder reaction in the synthesis of natural products." Organic & Biomolecular Chemistry 15, no. 15 (2017): 3105–29. http://dx.doi.org/10.1039/c6ob02761j.

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Spino, Claude, Bryan Hill, Pascal Dubé, and Stéphane Gingras. "A diene-transmissive approach to the quassinoid skeleton." Canadian Journal of Chemistry 81, no. 1 (January 1, 2003): 81–108. http://dx.doi.org/10.1139/v02-196.

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Several tetracyclic molecules were prepared by diene-transmissive Diels–Alder cycloadditions. Control over the stereochemical outcome of the cycloaddition was achieved and the structural features of the precursors affecting the stereochemistry is discussed. Useful information was gathered concerning the factors governing this stereocontrol, which will be indispensable for the future of this strategy.Key words: quassinoid, anticancer agent, diene-transmissive Diels–Alder cycloaddition, oxadiene, hetero Diels–Alder.
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Li, Na, Xianrui Liang, and Weike Su. "New insights into the asymmetric Diels–Alder reaction: the endo- and S-selective retro-Diels–Alder reaction." RSC Advances 5, no. 128 (2015): 106234–38. http://dx.doi.org/10.1039/c5ra17788j.

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Liu, Hsing-Jang, Wen-Lung Yeh, and Eric N. C. Browne. "Activated cycloheptenone dienophiles. A versatile approach to 6,7-fused ring targets." Canadian Journal of Chemistry 73, no. 7 (July 1, 1995): 1135–47. http://dx.doi.org/10.1139/v95-140.

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Several 2-carbalkoxy-2-cyclohepten-1-ones were prepared and their Diels–Alder characteristics examined in order to develop a facile general approach to the synthesis of cycloheptane ring-containing polycyclic natural products. Substitution pattern on the seven-membered ring was found to greatly affect the Diels–Alder behavior. In addition, some extraordinary facial stereoselectivity was observed. Keywords: Diels–Alder reaction, 2-carbalkoxy-2-cyclohepten-1-ones, 6,7-fused ring system.
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Goh, Yit W., and Jonathan M. White. "Structure Correlation Study of Some Diels–Alder Cycloadducts of Anthracene." Australian Journal of Chemistry 62, no. 5 (2009): 419. http://dx.doi.org/10.1071/ch09050.

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Crystal structures of some Diels–Alder cycloadducts of anthracene and a variety of dienophiles reveal structural effects consistent with the manifestation of the early stages of the retro Diels–Alder reaction in the ground state structure. The symmetrical cycloadducts 3 and 4 reveal a qualitative relationship between structure and reactivity, whereas the cycloadducts of 9-methoxyanthracene show structural effects suggestive of the early stages of an asynchronous retro Diels–Alder reaction.
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Liu, Zhang, Wang, Zan, and Zhang. "The Role of Iodine Catalyst in the Synthesis of 22-Carbon Tricarboxylic Acid and Its Ester: A Case Study." Catalysts 9, no. 12 (November 20, 2019): 972. http://dx.doi.org/10.3390/catal9120972.

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Here, 22-carbon tricarboxylic acid (C22TA) and its ester (C22TAE) were prepared via the Diels–Alder reaction of polyunsaturated fatty acids (PUFAs) and their esters (PUFAEs) as dienes with fumaric acid (FA) and dimethyl fumarate (DF) as dienophiles, respectively. The role of an iodine catalyst for the synthesis of C22TA and C22TAE in the Diels–Alder type reaction was investigated using a spectroscopic approach. The chemical structures of the products were characterized using proton nuclear magnetic resonance (1H-NMR) and electrospray ionization mass spectrometry (ESI-MS) analysis. Results showed that nonconjugated dienes can react with dienophiles through a Diels–Alder reaction with an iodine catalyst, and that iodine transformed the nonconjugated double bonds of dienes into conjugated double bonds via a radical process. DF was more favorable for the Diels–Alder reaction than FA. This was mainly because the dienophile DF contained an electron-withdrawing substituent, which reduced the highest and lowest occupied molecular orbital (HOMO–LUMO) energy gap and accelerated the Diels–Alder reaction. By transforming nonconjugated double bonds into conjugated double bonds, iodine as a Lewis acid increased the electron-withdrawing effect of the carbonyl group on the carbon–carbon double bond and reduced the energy difference between the HOMO of diene and the LUMO of dienophile, thus facilitating the Diels–Alder reaction.
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N'Guyen, Thi Thanh Thuy, Guillaume Contrel, Véronique Montembault, Gilles Dujardin, and Laurent Fontaine. "Phosphonated furan-functionalized poly(ethylene oxide)s using orthogonal click chemistries: synthesis and Diels–Alder reactivity." Polymer Chemistry 6, no. 16 (2015): 3024–30. http://dx.doi.org/10.1039/c5py00188a.

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Dissertations / Theses on the topic "Diels-Alder"

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Essenfeld, Amy Pia. "Asymmetric intramolecular Diels-Alder reactions." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/15197.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1986.
MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE
Includes bibliographical references.
by Amy Pia Essenfeld.
Ph.D.
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Göstl, Robert. "Photocontrolling the Diels-Alder reaction." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2014. http://dx.doi.org/10.18452/17060.

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Die Aufgabe des synthetischen Chemikers besteht darin neue Moleküle, Bauelemente oder Medikamente aus einfachen Edukten herzustellen. Die wachsende Komplexität dieser synthetischen Produkte bedingt jedoch, dass die Entwicklung der dazu benötigten Werkzeuge ebenso schritthalten muss. Licht ist mit seiner herausragenden räumlichen, zeitlichen und energetischen Auflösung sowie seinem nicht-invasiven Charakter den traditionell verwendeten Stimuli überlegen. In dieser Arbeit wurde durch die Kombination eines molekularen Photoschalters mit der Diels-Alder-Reaktion die Photokontrolle über eine dynamisch-kovalente Reaktion erlangt. Das Ergebnis der Reaktion eines furyl-substituierten Diarylethens mit Maleinimid konnte ausschließlich durch die Bestrahlung mit Licht unterschiedlicher Farbe bestimmt werden. Dieses prototypische System wurde dann unter Erhalt seiner photochemischen Eigenschaften für die Anwendung unter physiologischen Bedingungen weiterentwickelt. Es konnte die photoreversible Freisetzung therapeutisch wirksamer Konzentrationen verschiedener Anti-Tumor-Medikamente in gepufferter, wässriger Lösung bei Körpertemperatur durch bioorthogonales sichtbares Licht ausgelöst werden. Weiterhin wurden die Feinabstimmung der Freisetzung dieser photoschaltbaren Diels-Alder-Addukte und eine ausführliche Untersuchung der Freisetzungs-Dynamiken gezeigt. Hierdurch wurde das System auf eine Stufe gehoben, an der in vivo Anwendungen erwägt werden können. Des Weiteren wurden die Grundlagen zur Implementierung der photokontrollierbaren Diels-Alder-Reaktion in der reversiblen kovalenten Funktionalisierung von Kohlenstoffnanoröhren gelegt. Trotzdem noch keine erfolgreiche Funktionalisierung nachgewiesen werden konnte, wurde durch die Untersuchung der zugrundeliegenden Prinzipien der Weg für die Anwendung fortgeschrittener Techniken zur Modulation physikochemischer Eigenschaften von sp2-Kohlenstoff Allotropen geebnet.
The synthetic chemist’s profession is devoted to the formation of chemical bonds to create new molecules, building blocks, or drugs from basic starting materials. However, the growing complexity of these synthetic products necessitates that the development of the tools to fulfill this task must also keep pace. Light as a stimulus with its superior spatial, temporal, as well as energetic resolution in combination with its non-invasive character outperforms the traditional means to control a chemical reaction, such as heat, pressure, or pH, clearly. In this work, the unprecedented reversible photocontrol over a dynamic covalent reaction was established by the combination of a molecular photoswitch and the well-known Diels-Alder reaction. The outcome of the reaction of a furyl-substituted diarylethene and maleimide could be determined exclusively by illumination with differently colored light. This prototypical system was then advanced for the application under physiological conditions while retaining its superior photochemical properties. The release of therapeutically effective concentrations of different antitumor agents could be photoreversibly triggered in buffered, aqueous solution at body temperature employing bioorthogonal visible light. It is shown how the release properties of these photoswitchable prodrugs can be fine-tuned and a thorough investigation of the release dynamics is presented promoting this system to a level where in vivo application can be considered. Furthermore, the foundations for the implementation of the photocontrollable Diels-Alder reaction in the reversible covalent functionalization of carbon nanotubes have been laid. Despite the fact that a successful functionalization has not yet been achieved, the basic principles were investigated and have paved the way for the application of more advanced techniques to effectively modulate the physicochemical properties of sp2-carbon allotropes.
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Ho, David Gai. "Adventures in Lewis acid catalyzed highly hindered Diels-Alder reactions; Novel non-Diels-Alder Diels-Alder reaction and its utility for the synthesis of haterumaimide E." Diss., Restricted to subscribing institutions, 2007. http://proquest.umi.com/pqdweb?did=1495960681&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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Cernak, Timothy Andrew. "A Diels-Alder approach to palau'amine /." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103369.

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Described in this thesis is the development of a key Diels-Alder reaction for use in a total synthesis of the potently immunosuppressant marine alkaloid palau'amine. This study focuses on the originally proposed structure of palau'amine. The strategy utilizes a computationally designed thiohydantoin dienophile as the 2pi component and a thermally stable 2-silyloxy-5-(silyloxymethyl)cyclopentadiene as the 4pi component in the critical Diels-Alder reaction. Essential to the design and study of these partners was the use of computational density functional theory (DFT) predictions.
Four families of dienophiles---oxazolones, dehydroalanines, hydantoins and thiohydantoins---were investigated. The hydantoins and thiohydantoins react with cyclopentadiene with up to 13:1 exo-selectivity while the dehydroalanines are modestly selective and the oxazolones are unselective. The exo-selectivity of the hydantoin and thiohydantoin dienophiles is attributed to a novel stabilizing interaction whereby the lone pair of electrons on nitrogen interacts with a developing positive charge on the diene in the transition state. In terms of reactivity, the oxazolones are the superior dienophiles. The reactivity of the thiohydantoins is greater than that of analogous hydantoins and approaches that of the oxazolones. The bolstered reactivity of the thiohydantoins is attributed to the increased donation of the nitrogen lone-pair into the thiocarbonyl bond. This phenomenon was recognized first in DFT predictions and then proven experimentally. Synthetic access to the requisite beta-(chloromethylene)thiohydantoins necessitated the development of a reaction between dilithium diamides and thiophosgene.
2-silyloxy-5-(silyloxymethyl)cyclopentadienes were studied experimentally and computationally and found to be much more stable than conventional 5-substituted cyclopentadienes towards thermal decomposition by 1,5 hydride shift. The new dienes undergo Diels-Alder reaction with oxazolone and thiohydantoin dienophiles with exoselectivities as high as 6:1 for nonchlorinated dienophiles. Fully functionalized chlorinated exo-cycloadducts were prepared with up to 1.5:1 selectivity and subjected to oxidative ring-opening to reveal the persubstituted core of palau'amine.
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Butt, Nicholas A. "A Diels-Alder approach towards pyrroindomycins." Thesis, University of Nottingham, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555692.

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Many natural products contain a tetramic acid (pyrrolidine-2,4-dione) ring system as an integral part of their structure. They exhibit a wide range of biological activities and are structurally diverse, making them an attractive target for the synthetic chemist. The pyrroindomycin antibiotics are an example of such natural products which contain a spirotetramate core. Studies towards the total synthesis of the pyrroindomycins are described within this thesis, which involve inter- and intra- molecular Diels-Alder approaches towards the synthesis of the spirotetramate core of the natural products. In addition to these synthetic strategies, the relative stereochemistry of the aglycone (previously unknown) was elucidated using NMR spectroscopy, and the findings reported herein. Diels-Alder studies were performed on a model tetramic acid dienophile and the reactivity of this type of system compared to dehydroalanine derivatives. Several spirotetramates were prepared utilising this method, in order to determine if a similar synthetic approach could be used to synthesise the spirotetramate core of the pyrroindomycins. In addition, a spirotetramate was prepared using a nitroalkene dienophile precursor. A number of intramolecular Diels-Alder reactions involving dehydroalanine and nitroalkene dienophiles were also attempted, in order to synthesise a spirotetramate precursor which could be elaborated to the natural products.
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Moloney, B. A. "Stereochemically controlled intramolecular Diels-Alder reactions." Thesis, Cardiff University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378452.

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Robson, David C. "Diels-Alder cycloaddition for novel bioanalysis." Thesis, University of Strathclyde, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428842.

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Birkinshaw, Timothy Nicholas. "Diels-Alder routes to Prosopis alkaloids." Thesis, University of Cambridge, 1987. https://www.repository.cam.ac.uk/handle/1810/270418.

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This thesis describes the investigation of the Diels-Alder reaction of the imine (140) with the diene (141) to give four products (142,143,156, 157). At low temperatures the enone (156) is the major product while at ambient temperature the bicyclic compounds (142) and (143) predominate. The reaction is highly solvent dependent, with the best results being obtained in benzene solution. Lewis acids appear to have little effect on the course of the reaction. The reaction of the imine (140) with the TBDMSO diene (159) gives the silyl enol ethers (160) and (161) as well as the above four products. Possible mechanisms are discussed. COOM. OSIM., In order to investigate asymmetric induction the 8- phenylmenthyl derived imine (194) was reacted with the diene (141) under a variety of conditions but no asymmetric induction was seen in the exo adducts, and only a small degree in the endo adducts. The bromination and Baeyer-Villiger oxidation of the ketone (142) were investigated and the resultant lactone (209) was converted into the bromide (258). ISOPROSOPININE A (84) ISOPROSOPININE B (S3) Several methods to prepare a suitable side chain for isoprosopinine A were investigated. The prosopis alkaloids isoprosopinine A (84) and B (85) were prepared by alkylation of the sulphones (252) and (266) with the bromide (258) followed by reductive removal of the N-tosyl and sulphone moieties with sodium amalgam. The imine (274) has been prepared and shown to undergo a Lewis acid catalysed imino-Diels-Alder reaction with the diene (141) to give the adducts (283) and (284). hCH,M=CHCOjM» (2T4) Alternative imines for asymmetric synthesis, such as (299) and (288) have been investigated. Preparation of the sulphinamide imine (299) has proved difficult. Attempts to carry out aqueous Diels-Alder reactions of the silyloxydiene (159) with iminium ions, generated in situ from amines, aldehydes and acids, have proved fruitless.
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Yamamoto, Yuhei. "Catalytic asymmetric nitroso Diels-Alder reaction." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/143962.

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Strange, Gregory Alan. "RESPONSIVE MATERIALS VIA DIELS-ALDER CHEMISTRY." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/710.

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The corrosion of infrastructure imposes a significant monetary cost, and at times human cost, upon society. Methods to improve corrosion resistance of materials are described herein which utilize the reversibility of the Diels-Alder reaction to impart thermal responsiveness upon materials. Such stimuli responsiveness can potentially play a role in self healing properties which lead to reduced cracking and thus increased corrosion protection. Reversible Diels-Alder chemistry was utilized to manipulate the surface energy of glass substrates. Hydrophobic dieneophiles were prepared and attached to glass slides and capillaries to yield a nonwetting surface. Thermal treatment of the surfaces cleaved the Diels-Alder linkage, and resulted in the fabrication of a hydrophilic surface. Preliminary analysis utilized contact angle (CA) measurements to monitor the change in surface energy, and observed a hydrophilic state (CA - 70±3°) before attachment of the dieneophile to a hydrophobic state (CA - 101±9°) followed by regeneration of the hydrophilic state (CA - 70±6°) upon cleavage of the Diels-Alder linkage. The treatments were then applied to glass capillaries, with effective treatment confirmed by fluid column measurements. Patterned treatments were also demonstrated to provide effective fluid flow gating. Reversible Diels-Alder linkages were incorporated into polymer thermoset binding resins in order to provide a means by which a crosslinked thermoset could undergo stimuli responsive reversible crosslinking. The binder systems which were utilized included two types of amine curing agents, polydimethylsiloxane (PDMS) and Jeffamine® polyetheramines (PEA), and two types of epoxy resins, EPON resin based on diglycidyl ether of Bisphenol-A and epoxidized soybean oil. Various dienes and dienophiles were employed to functionalize the selected binder systems and were met with various degrees of success. The synthetic technique which proved to be the most promising was the Diels-Alder modification of the epoxidized soybean oil.
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Books on the topic "Diels-Alder"

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Boger, Dale L. Hetero Diels-Alder methodology inorganic synthesis. San Diego: Academic Press, 1987.

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Aldo, Taticchi, ed. Dienes in the Diels-Alder reaction. New York: Wiley, 1990.

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Lin, Denny. Intramolecular Diels-Alder reactions of alkenylboranes & a hetero Diels-Alder approach to the total synthesis of Martinelline. Ottawa: National Library of Canada = Bibliothèque nationale du Canada, 1999.

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Boger, Dale L. Hetero Diels-Alder methodology in organic synthesis. San Diego: Academic Press, 1987.

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Thadani, Avinash N. Alkenyl- and dienylboronate tethered intramolecular diels-alder reactions. Ottawa: National Library of Canada, 1998.

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Robertson, Andrew 1971. Recognition-mediated control of the Diels-Alder reaction. Birmingham: University of Birmingham, 1997.

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Iqbal, Sayeedha. Towards aza-macropolycycles via repetitive Diels-Alder reactions. Birmingham: University ofBirmingham, 1993.

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Ernst, Wagner. Untersuchungen zur asymmetrischen Induktion in der Hetero-Diels-Alder-Reaktion. Konstanz: Hartung-Gorre, 1989.

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Adam, I. M. Investigation of a model system for diels-alder polymerization. Manchester: UMIST, 1995.

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Bennes, Raphaël Michel. Recognition-induced control and acceleration of Diels-Alder cycloadditions. Birmingham: University of Birmingham, 2000.

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Book chapters on the topic "Diels-Alder"

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Brea, Roberto J., and Neal K. Devaraj. "Diels-Alder and Inverse Diels-Alder Reactions." In Chemoselective and Bioorthogonal Ligation Reactions, 67–95. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2017. http://dx.doi.org/10.1002/9783527683451.ch3.

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Du, Haifeng, and Kuiling Ding. "Diels-Alder and Hetero-Diels-Alder Reactions." In Comprehensive Enantioselective Organocatalysis, 1131–62. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527658862.ch38.

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Li, Jie Jack. "Diels-Alder reaction, inverse electronic demand Diels-Alder reaction, hetero-Diels-Alder reaction." In Name Reactions, 98–99. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04835-1_82.

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Laue, Thomas, and Andreas Plagens. "Diels-Alder-Reaktion." In Teubner Studienbücher Chemie, 92–100. Wiesbaden: Vieweg+Teubner Verlag, 1994. http://dx.doi.org/10.1007/978-3-322-94015-5_32.

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Laue, Thomas, and Andreas Plagens. "Diels-Alder-Reaktion." In Teubner Studienbücher Chemie, 96–104. Wiesbaden: Vieweg+Teubner Verlag, 1998. http://dx.doi.org/10.1007/978-3-322-94077-3_33.

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Li, Jie Jack. "Diels-Alder reaction." In Name Reactions, 111–12. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05336-2_87.

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Evans, David A., and Jeffrey S. Johnson. "Diels-Alder Reactions." In Comprehensive Asymmetric Catalysis I–III, 1177–235. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-58571-5_8.

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Gooch, Jan W. "Diels-Alder Polymers." In Encyclopedic Dictionary of Polymers, 214. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_3592.

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Laue, Thomas, and Andreas Plagens. "Diels-Alder-Reaktion." In Teubner Studienbücher Chemie, 92–100. Wiesbaden: Vieweg+Teubner Verlag, 1994. http://dx.doi.org/10.1007/978-3-322-94726-0_32.

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Matteson, Donald S. "Diels-Alder Reactions." In Reactivity and Structure Concepts in Organic Chemistry, 329–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-79709-5_8.

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Conference papers on the topic "Diels-Alder"

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Teixeira, Milena G., Elson S. Alvarenga, Antonio J. Demuner, Célia R. A. Maltha, and Luiz Claudio A. Barbosa. "Synthesis of isobenzofuranones by Diels-Alder reaction." In 15th Brazilian Meeting on Organic Synthesis. São Paulo: Editora Edgard Blücher, 2013. http://dx.doi.org/10.5151/chempro-15bmos-bmos2013_2013910132953.

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Doležal, Rafael, Natálie Karásková, Nadezhda V. Maltsevskaya, and Karel Kolář. "SUPPORTING CONCEPTUAL LEARNING IN ORGANIC CHEMISTRY THROUGH SEMI-EMPIRICAL MOLECULAR MODELING: HEURISTICS OF DIELS-ALDER [4+2] CYCLOADITIONS FOR PREPARATION OF POTENTIAL TLR4 MODULATORS." In Proceedings of the 2nd International Baltic Symposium on Science and Technology Education (BalticSTE2017). Scientia Socialis Ltd., 2017. http://dx.doi.org/10.33225/balticste/2017.39.

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A vast majority of novices in universities predominantly utilize algorithmic mental processes to resolve assigned tasks and tests. Although algorithmic thinking is an essential part of human cognitive functions, experts on didactics call for methods, which develop also conceptual thinking in beginners. Currently, heuristic molecular modeling gains an important position in chemistry education since it inherently integrates several conceptual thinking principles. Herein, it is focused on computational analysis of eight potential immunomodulators prepared by Diels-Alder reactions to exemplify conceptualized chemistry learning. Keywords: conceptual learning, diels-alder cycloadditions, molecular modeling, RM1, activation energy.
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Mancini, Pedro, Claudia Della Rosa, Elisa Paredes, and María Kneeteman. "2-Nitrofurans as Dienophiles in Diels-Alder Reactions." In The 8th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland: MDPI, 2004. http://dx.doi.org/10.3390/ecsoc-8-01950.

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Santos, Deborah A. dos, Ludmila R. Rodrigues, Valdemar Lacerda Jr., Sandro J. Greco, Alvaro C. Neto, and Reginaldo B. dos Santos. "NbCl5 as Catalyst in Diels-Alder Reaction of Furan Ring." In 15th Brazilian Meeting on Organic Synthesis. São Paulo: Editora Edgard Blücher, 2013. http://dx.doi.org/10.5151/chempro-15bmos-bmos2013_201387221042.

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Kneeteman, Maria, Claudia Rosa, and Pedro Mancini. "Different Behaviouof of Disubtituted Aromatic Heterocycles in Polar Diels-Alder Reactions." In The 11th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland: MDPI, 2007. http://dx.doi.org/10.3390/ecsoc-11-01301.

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Koll, Liliana, Sandra Mandolesi, and Romina Ocampo. "Bicyclic Allyltin Derivatives through Selective "One Pot" Hydrostannation-Diels Alder Reaction." In The 14th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland: MDPI, 2010. http://dx.doi.org/10.3390/ecsoc-14-00379.

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Donatoni, Maria Carolina, Timothy John Brocksom, Marciana P. Uliana, and Kleber T. de Oliveira. "The Diels-Alder reactions of carbomethoxy-p-benzoquinones with simple dienes." In 14th Brazilian Meeting on Organic Synthesis. São Paulo: Editora Edgard Blücher, 2013. http://dx.doi.org/10.5151/chempro-14bmos-r0197-1.

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Thiemann, Thies, Hasnaa Sadeq, John Graham, Yosef Al Jasem, Bernhard Bugenhagen, and Nathir al Rawashdeh. "Extended Anthracenes and Their Use as Dienes in Diels-Alder Reactions." In The 18th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland: MDPI, 2014. http://dx.doi.org/10.3390/ecsoc-18-a045.

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Dib, Salima, Bachir Mostefa-Kara, Didier Villemin, and Nathalie Bar. "Study of Diels–Alder Reactions of Purpurogallin Tetraacetate with Various Dienophiles." In ECSOC-25. Basel Switzerland: MDPI, 2021. http://dx.doi.org/10.3390/ecsoc-25-11707.

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Kuo, Y. H., Jingdong Luo, W. H. Steier, and Alex K. Jen. "Thermally Stable Electro-Optic Polymer Modulator Using Diels-Alder Cross-linkable Polymer." In Frontiers in Optics. Washington, D.C.: OSA, 2005. http://dx.doi.org/10.1364/fio.2005.swa4.

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Reports on the topic "Diels-Alder"

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Bowman, Christopher, Brian J. Adzima, and Benjamin John Anderson. Covalently crosslinked diels-alder polymer networks. Office of Scientific and Technical Information (OSTI), September 2011. http://dx.doi.org/10.2172/1029765.

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Loy, Douglas A. New Polybenzimidazole Architectures by Diels Alder Polymerization. Fort Belvoir, VA: Defense Technical Information Center, February 2012. http://dx.doi.org/10.21236/ada557830.

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McNicholas, Michael. On the mechanism of the Diels-Alder reaction--dimerization of trans-phenylbutadiene. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.972.

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