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Journal articles on the topic 'Reverse Diels-Alder'

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1

Zakharova, Daria V., Zalina A. Lok’yaeva, Alexander A. Pavlov, and Alexander V. Polezhaev. "New Chain Extenders for Self-Healing Polymers." Key Engineering Materials 899 (September 8, 2021): 628–37. http://dx.doi.org/10.4028/www.scientific.net/kem.899.628.

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We present here a small series of compounds designed to modify the polymer chain of various polyurethanes in order to introduce a structural fragment with the ability of thermally-triggered reversible covalent interactions. Bismaleimides (2a-2e) were synthesized from commercially available aromatic and aliphatic symmetric diamines (1a-1e) and were further introduced into the Diels-Alder reaction with furfuryl alcohol as dienophiles. The Diels-Alder adducts (3a-3e) were obtained as a mixture of endo- and exo-isomer. The presence of symmetrical hydroxyl groups in the structure of the obtained co
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2

Polezhaev, Alexander V., Daniel M. Beagan, Alyssa C. Cabelof, Chun-Hsing Chen, and Kenneth G. Caulton. "A substituent-tolerant synthetic approach to N/P-“loaded” heteroarenes." Dalton Transactions 47, no. 17 (2018): 5938–42. http://dx.doi.org/10.1039/c8dt00533h.

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3

Borisevich, Sophia S., Alena V. Kovalskaya, Inna P. Tsypysheva, and Sergey L. Khursan. "Thermodynamically controlled Diels–Alder reaction of 12-N-methylcytisine: A DFT study." Journal of Theoretical and Computational Chemistry 13, no. 06 (2014): 1450048. http://dx.doi.org/10.1142/s0219633614500485.

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A DFT study was performed for the Diels–Alder traction of 12-N-methylcytisine with a number of dienophiles (in boiling toluene under atmospheric pressure), namely, N-phenylmaleimide, maleic anhydride, 2,4-benzoquinone, tetracyanoethylene and methyl methacrylate. It was shown that 12-N-methylcytisine selectively reacts with these dienophiles, only the reaction with N-phenylmaleimide (NPM) resulting in the formation of thermodynamically stable adducts, which is consistent with experimental data. This selectivity of 12-N-methylcytisine is attributable to the difference between the properties of t
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4

Buttery, JH, J. Moursounidis, and D. Wege. "A,B-Diheteropentalenes by a Tandem Intramolecular Diels-Alder/Reverse Diels-Alder Reaction Sequence. Application to the Synthesis of Thieno[3,4-b]furan." Australian Journal of Chemistry 48, no. 3 (1995): 593. http://dx.doi.org/10.1071/ch9950593.

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Alkylation of 2-furylmethanethiol (28) with propargyl chloride gave the thioether (22) which on methoxycarbonylation afforded the acetylenic ester (30). On heating, this material underwent an intramolecular Diels -Alder reaction to give the tricyclic compound (32). In the presence of 3,6- di (pyridin-2′-yl)-s- tetrazine , (32) afforded methyl 4,6-dihydrothieno[3,4-b]furan-3-carboxylate (38) by a sequence involving a further Diels -Alder reaction followed by two reverse Diels-Alder reactions. The ester (38) could be dehydrogenated to give methyl thieno [3,4-b]furan-3-carboxylate (40) while hydr
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5

Bertholio, Frédéric, Pierre Mison, Thierry Pascal, and Bernard Sillion. "Mechanism of endo-exo isomerization of nadimide end-capped oligomers." High Performance Polymers 5, no. 1 (1993): 47–57. http://dx.doi.org/10.1088/0954-0083/5/1/005.

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Before polymerization, nadimide end-capped polyimide oligomers exist in the endo form. During the cure, an endo-exo equilibrium takes place. This paper discusses the relationship between endo-exo isomerization and the reverse-Diels-Alder reaction of the nadinaide system. As a consequence of the experimental results, an explanation for cyclopentadiene evolution during the polymerization of nadimide systems is given.
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6

Garcia, J. Gabriel, Frank R. Fronczek, and Mark L. McLaughlin. "Tandem reverse-electron-demand diels-alder reactions of 1,5-cyclooctadiene." Tetrahedron Letters 32, no. 28 (1991): 3289–92. http://dx.doi.org/10.1016/s0040-4039(00)92688-1.

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7

Harriman, D. Joseph, and Ghislain Deslongchamps. "Reverse-docking study of the TADDOL-catalyzed asymmetric hetero-Diels–Alder reaction." Journal of Molecular Modeling 12, no. 6 (2006): 793–97. http://dx.doi.org/10.1007/s00894-006-0097-z.

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8

GARCIA, J. G., F. R. FRONCZEK, and M. L. MCLAUGHLIN. "ChemInform Abstract: Tandem Reverse-Electron-Demand Diels-Alder Reactions of 1,5- Cyclooctadiene." ChemInform 23, no. 15 (2010): no. http://dx.doi.org/10.1002/chin.199215069.

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9

Tsai, Tzeng-Guang, and Chin-Hui Yu. "Effect of Orbital Overlap in Thermal Reverse Homo-Diels-Alder Reaction and Intramolecular Reverse Ene Reaction." Journal of the Chinese Chemical Society 41, no. 6 (1994): 631–34. http://dx.doi.org/10.1002/jccs.199400088.

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10

Zhang, Jianyuan, Yanbang Li, Yue Sun, and William Kopcha. "(Invited) Multicomponent Reactions Towards New Fullerene and Metallofullerene Derivatives." ECS Meeting Abstracts MA2022-01, no. 11 (2022): 813. http://dx.doi.org/10.1149/ma2022-0111813mtgabs.

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Fullerenes and endohedral metallofullerenes (EMFs) are molecular building blocks for a variety of organic materials widely applicable in photovoltaics, catalysis, quantum information science, semi-conductors, biomedicines, and so on. Regioselective functionalization reactions are essential for the construction of fullerene and EMF materials. Multicomponent reactions that generate reactive species to be captured by the double bonds on fullerenes or EMFs represent a useful approach to develop new reactions. In this presentation we hope to share our recent work in the development of new reactions
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11

Rao, Venkataramanarao, Suryakiran Navath, Mohankumar Kottur, James R. McElhanon, and Dominic V. McGrath. "An efficient reverse Diels–Alder approach for the synthesis of N-alkyl bismaleimides." Tetrahedron Letters 54, no. 37 (2013): 5011–13. http://dx.doi.org/10.1016/j.tetlet.2013.07.002.

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12

Moursounidis, John, and Dieter Wege. "Benzannulated Isobenzofurans." Australian Journal of Chemistry 41, no. 2 (1988): 235. http://dx.doi.org/10.1071/ch9880235.

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A number of arynes, generated by treatment of haloarenes with sodium or potassium amide in tetrahydrofuran, were trapped with furan. The resulting dihydro epoxy arenes were converted into the following annulated isobenzofuran derivatives by using reverse Diels-Alder methodology: naphtho[l,2-clfuran, phenanthro[9,10-elfuran, pyreno[l,2-elfuran, pyreno[3,4- elfuran, anthra[l,2- elfuran, phenanthro[l,2- clfuran and phenanthro[3,4- elfuran. Bimolecular rate constants for the addition of maleic anhydride to these furans were measured, and were correlated with the Herndon structure count. Addition o
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13

BUTTERY, J. H., J. MOURSOUNIDIS, and D. WEGE. "ChemInform Abstract: A,B-Diheteropentalenes by a Tandem Intramolecular Diels-Alder/Reverse Diels-Alder Reaction Sequence. Application to the Synthesis of Thieno( 3,4-b)furan." ChemInform 26, no. 29 (2010): no. http://dx.doi.org/10.1002/chin.199529132.

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14

Bedi, Anjan, Armon Amit Manor, and Ori Gidron. "The Effect of Twisting on the Capture and Release of Singlet Oxygen by Tethered Twisted Acenes." Organic Letters 20 (September 23, 2020): 7809. https://doi.org/10.1021/acs.orglett.0c02666.

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The use of polyaromatic hydrocarbons to capture and release singlet oxygen is of considerable importance in materials chemistry, synthesis, and photodynamic therapy. Here we studied the ability of a series of tethered twistacenes, possessing different degrees of backbone twist, to capture and release singlet oxygen via the reversible Diels–Alder reaction. When the twistacene acts as both a sensitizer and a diene, the photo-oxidation rate depends on the extinction coefficient of the irradiation wavelength. However, when the twistacenes function solely as a diene, the rate of photo-oxidati
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15

Moursounidis, John, and Dieter Wege. "The synthesis of thieno[3,4-]furan using a tandem intramolecular-reverse Diels-Alder reaction approach." Tetrahedron Letters 27, no. 26 (1986): 3045–48. http://dx.doi.org/10.1016/s0040-4039(00)84712-7.

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16

Rao, Venkataramanarao, Suryakiran Navath, Mohankumar Kottur, James R. McElhanon, and Dominic V. McGrath. "ChemInform Abstract: An Efficient Reverse Diels-Alder Approach for the Synthesis of N-Alkyl Bismaleimides." ChemInform 44, no. 52 (2013): no. http://dx.doi.org/10.1002/chin.201352044.

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17

Inoue, Seiichi, and Zhan Guo Lu. "A Facile Synthesis of 9-Nor-9-hydroxyhexahydrocannabinol via Intramolecular Reverse Electron Demand Diels-Alder Cyclization." HETEROCYCLES 34, no. 6 (1992): 1107. http://dx.doi.org/10.3987/com-92-5971.

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18

Adzima, Brian J., H. Alan Aguirre, Christopher J. Kloxin, Timothy F. Scott, and Christopher N. Bowman. "Rheological and Chemical Analysis of Reverse Gelation in a Covalently Cross-Linked Diels−Alder Polymer Network." Macromolecules 41, no. 23 (2008): 9112–17. http://dx.doi.org/10.1021/ma801863d.

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19

Pan, Yunlin, Xi Yu, Pengfei Yang, et al. "The influence of furanyl monomer on the self-healing polyurethanes by reverse Diels-Alder cross-link." Polymers for Advanced Technologies 30, no. 3 (2018): 804–7. http://dx.doi.org/10.1002/pat.4507.

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20

Yamanaka, Hiroshi, Mataichi Sagi, Kunio Wada, and Shoetsu Konno. "Studies of as-Triazine Derivatives. XV. Intramolecular Reverse-Election Demand Diels-Alder Reaction of 1,2,4-Triazine Derivatives." HETEROCYCLES 30, no. 2 (1990): 1009. http://dx.doi.org/10.3987/com-89-s102.

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21

LU, Z. G., and S. INOUE. "ChemInform Abstract: A Facile Synthesis of 9-Nor-9-hydroxyhexahydrocannabinol via Intramolecular Reverse Electron Demand Diels-Alder Cyclization." ChemInform 23, no. 40 (2010): no. http://dx.doi.org/10.1002/chin.199240266.

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22

Pączkowski, Przemysław, and Barbara Gawdzik. "Studies on Preparation, Characterization and Application of Porous Functionalized Glycidyl Methacrylate-Based Microspheres." Materials 14, no. 6 (2021): 1438. http://dx.doi.org/10.3390/ma14061438.

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A one-step swelling and polymerization technique was used in the synthesis of porous glycidyl methacrylate (GMA) and ethylene glycol dimethacrylate (EGDMA) monodisperse polymeric microspheres. The polystyrene (PS) seed obtained in the dispersion polymerization was used as a shape template. The presence of epoxide rings in the chemical structure of microspheres enables their post-polymerization chemical modifications involving: the Diels-Alder reaction with sodium cyclopentadienide and maleic anhydride, the reaction with 4,4′-(bismaleimido)diphenylmethane, and the thiol-Michael reaction with me
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23

Garcia, J. Gabriel, та Mark L. McLaughlin. "Reverse-electron-demand diels-alder dienophile π-face selectivity via conformation dependent transmission of π-σ-π electronic interactions." Tetrahedron Letters 32, № 28 (1991): 3293–96. http://dx.doi.org/10.1016/s0040-4039(00)92689-3.

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24

Suzuki, Takahiro, Aya Sasaki, Naoki Egashira, and Susumu Kobayashi. "A Synthetic Study of Atropurpuran: Construction of a Pentacyclic Framework by an Intramolecular Reverse-Electron-Demand Diels-Alder Reaction." Angewandte Chemie International Edition 50, no. 39 (2011): 9177–79. http://dx.doi.org/10.1002/anie.201103950.

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25

Suzuki, Takahiro, Aya Sasaki, Naoki Egashira, and Susumu Kobayashi. "A Synthetic Study of Atropurpuran: Construction of a Pentacyclic Framework by an Intramolecular Reverse-Electron-Demand Diels-Alder Reaction." Angewandte Chemie 123, no. 39 (2011): 9343–45. http://dx.doi.org/10.1002/ange.201103950.

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26

Masuyama, Yoshiro, Manabu Fuse, and Yasuhiko Kurusu. "In Turn or in Reverse Palladium-Catalyzed Carbonyl Allylation and Diels-Alder Reaction by 2-Methylene-3-buten-1-ol." Chemistry Letters 22, no. 7 (1993): 1199–202. http://dx.doi.org/10.1246/cl.1993.1199.

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27

Huybrechts, G., and B. Van Mele. "Structure-reactivity correlations for gas-phase thermal Diels-Alder reactions of cyclohexa-1,3-diene with substituted ethenes and reverse reactions." International Journal of Chemical Kinetics 26, no. 3 (1994): 333–39. http://dx.doi.org/10.1002/kin.550260303.

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28

GARCIA, J. G., та M. L. MCLAUGHLIN. "ChemInform Abstract: Reverse-Electron-Demand Diels-Alder Dienophile π-Face Selectivity via Conformation Dependent Transmission of .pi±sigma±pi. Electronic Interactions." ChemInform 23, № 15 (2010): no. http://dx.doi.org/10.1002/chin.199215070.

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29

Yamanaka, Hiroshi, Mataichi Sagi, Osamu Sato, and Shoetsu Konno. "Studies on as-Triazine derivatives XIV. Synthesis and Reverse Electron-demand Diels-Alder Reaction of Ethyl 5,8-Dichloro-1,2,4-benzotriazine-3-carboxylate." HETEROCYCLES 29, no. 12 (1989): 2253. http://dx.doi.org/10.3987/com-89-5156.

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30

MASUYAMA, Y., M. FUSE, and Y. KURUSU. "ChemInform Abstract: In Turn or in Reverse Palladium-Catalyzed Carbonyl Allylation and Diels-Alder Reaction by 2-Methylene-3-buten-1-ol." ChemInform 24, no. 50 (2010): no. http://dx.doi.org/10.1002/chin.199350167.

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31

HUYBRECHTS, G., and B. VAN MELE. "ChemInform Abstract: Structure-Reactivity Correlations for Gas-Phase Thermal Diels-Alder Reactions of Cyclohexa-1,3-diene with Substituted Ethenes and Reverse Reactions." ChemInform 25, no. 25 (2010): no. http://dx.doi.org/10.1002/chin.199425040.

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32

VALEEV, F. A. "SYNTHESIS OF ELEUTHESIDES." Izvestia Ufimskogo Nauchnogo Tsentra RAN, no. 2 (June 10, 2024): 8–25. http://dx.doi.org/10.31040/2222-8349-2024-0-2-8-25.

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The review is devoted to research in the field of "marine" diterpene metabolites of the 4,7-oxaeunicellan type, which have a taxol-like mechanism of cytotoxic action. The known most effective chemical syntheses are presented, as well as the results of our own research, on the basis of which, based on (+)-δ-cadinol, the formal synthesis of eleuthesides was realized, and the synthesis of analogs of sorcrdictyin A and eleutherobin was carried out from the Diels-Alder adduct of levogluclsenone and piperylene. In the course of the research, the features of the chemical behavior of the little-studie
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33

Desimoni, Giovanni, Giuseppe Faita, Matilde Guala, and Carmela Pratelli. "Different Lanthanide Ions and the Pybox Substituents Induce the Reverse of the Sense of Induction in the Enantioselective Diels−Alder Reaction between Acryloyloxazolidinone and Cyclopentadiene." Journal of Organic Chemistry 68, no. 20 (2003): 7862–66. http://dx.doi.org/10.1021/jo034215d.

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34

Wolfe, Saul, Anthony V. Buckley, and Noham Weinberg. "A comprehensive computational examination of transannular Diels–Alder reactions of unsubstituted C14 trienes — Barriers, template effects, and the Curtin–Hammett principle." Canadian Journal of Chemistry 79, no. 8 (2001): 1284–92. http://dx.doi.org/10.1139/v01-103.

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A combination of MM3-level molecular mechanics calculations and PM3-level semiempirical molecular orbital calculations has been employed, in conjunction with an algorithm for the comprehensive conformational analysis of cyclic compounds, to obtain 1202 unique 1,3,9-cyclotetradecatriene conformations, distributed over the six possible geometrical isomers, and 70 unique transannular Diels–Alder transition structures leading to the six possible stereoisomeric tricyclic olefins. A kinetic analysis that takes into account all minima of a given geometrical isomer and all transition structures leadin
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35

Vidadala, Ramasubbarao. "Study and optimization of Diels-Alder reaction of piperine in aqueous ionic solutions using Gn.HCl as a catalyst." Journal of Green Chemistry and Chemical Engineering 1, no. 1 (2021): 1–7. http://dx.doi.org/10.55124/jgce.v1i1.18.

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V. Rama Subbaraoa*
 aNatural Products Laboratory, Organic Chemistry Division-I, Indian Institute of Chemical Technology, Habsiguda, Hyderabad 500007, India.
 Study and optimization of Diels-Alder reaction of piperine in aqueous ionic solutions using Gn.HCl as a catalyst. The semi-synthesis of these products using intermolecular [4+2] cycloaddition reaction has been described. Obtained products were characterized using IR, HNMR, CNMR and Mass Spectroscopy.
 Introduction
 An outsized number of phenomena concern to and are conducted in liquid phase involving ionic species (Mil
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36

Chiba, Kazuhiro. "(Organic and Biological Electrochemistry Division Manuel M. Baizer Award, Digital Presentation) Electron-Transfer-Triggered Smart Reactions Boost a Better Anthropocene." ECS Meeting Abstracts MA2022-01, no. 42 (2022): 1827. http://dx.doi.org/10.1149/ma2022-01421827mtgabs.

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It is important that chemical reactions initiated by electron transfer associated with electrodes can be achieved by precise control of intramolecular and intermolecular electron transfer of organic compounds, which is difficult to achieve by general chemical methods. Expectations for a new production process that positively controls the electron transfer is also expanding dramatically. Here, the solvent that dissolves the substrate for reaction, the network structure of the ionic species in the solution, and the role of coexisting substances are exactly grasped, and the total energy consumpti
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37

Franck, Richard W., S. Argade, C. S. Subramaniam, and Denise M. Frechet. "The face selectivity directed by an allylic group of a diene in the diels-alder reaction is reversed from that of a dienophile." Tetrahedron Letters 26, no. 27 (1985): 3187–90. http://dx.doi.org/10.1016/s0040-4039(00)98148-6.

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38

Jing, Liling, Mark G. Moloney, Hao Xu, et al. "Carbene modification and reversible crosslinking of silver nanoparticles for controlled antibacterial activity." Scientific Reports 10, no. 1 (2020). http://dx.doi.org/10.1038/s41598-020-72043-1.

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Abstract Silver nanoparticles (Ag NPs) system capable of exhibiting different particle size at different temperature was developed, which depended on the extent of Diels–Alder (DA) reaction of bismaleimide with furan. Thus, Ag NPs were functionalized on the surface by a furyl-substituted carbene through an insertion reaction. Subsequent reversible DA crosslinking achieved a controlled aggregation with different particle size, which gives a series of different antibacterial activity. These Ag NPs were characterized by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X
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39

MOURSOUNIDIS, J., and D. WEGE. "ChemInform Abstract: The Synthesis of Thieno[3,4-b]furan Using a Tandem Intramolecular-Reverse Diels-Alder Reaction Approach." Chemischer Informationsdienst 17, no. 48 (1986). http://dx.doi.org/10.1002/chin.198648190.

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40

SAGI, M., K. WADA, S. KONNO, and H. YAMANAKA. "ChemInform Abstract: Studies on as-Triazine Derivatives. Part 15. Intramolecular Reverse-Electron Demand Diels-Alder Reaction of 1,2,4-Triazine Derivatives." ChemInform 21, no. 47 (1990). http://dx.doi.org/10.1002/chin.199047062.

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41

SAGI, M., O. SATO, S. KONNO, and H. YAMANAKA. "ChemInform Abstract: Studies on as-Triazine Derivatives. Part 14. Synthesis and Reverse Electron-Demand Diels-Alder Reaction of Ethyl 5,8-Dichloro-1,2,4-benzotriazine-3-carboxylate." ChemInform 21, no. 27 (1990). http://dx.doi.org/10.1002/chin.199027103.

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42

Richter, Wagner Eduardo. "The increased Diels–Alder reactivity of umpolung tropone: analysis of individual atoms and bonds using QTAIM and IQA along complete IRC paths." Journal of Physical Organic Chemistry, September 29, 2023. http://dx.doi.org/10.1002/poc.4572.

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AbstractA fruitful debate took place recently in literature, discussing the enhanced Diels–Alder reactivity of tropone derivatives for which the carbonyl polarity was reversed by means of umpolung. Karas et al. sustained that the umpolung increases the antiaromatic character of the ring, affecting the highest occupied molecular orbital (HOMO)/least unoccupied molecular orbital (LUMO) energies, speeding up the reaction. Tiekink et al. challenged this interpretation by sustaining that the asynchronicity of the reaction mechanisms, rather than orbital energy perturbation, was the main responsible
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43

Yıldırım, Ayhan, and Mehmet Suat Aksoy. "Chemoselective direct amidation of fatty acids with furfurylamine without coupling reagents in reversed micellar microenvironment." Journal of Heterocyclic Chemistry, January 26, 2024. http://dx.doi.org/10.1002/jhet.4786.

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AbstractFuran heterocyclic compounds derived from renewable sources are popular versatile candidates for the production of multifunctional macromolecular materials. These compounds are also used as hydrophobilization monomers for reversible polyadducts or as versatile building blocks in Diels‐Alder reactions. In the present study, an efficient approach to chemoselective acylation of furfurylamine with a series of non‐preactivated monocarboxylic or dicarboxylic long‐chain fatty acids and some of their functionalized derivatives has been achieved via catalytic direct amidation in reversed micell
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44

Zhang, Yan, Yemeng Sun, Xi Ren, et al. "Chiral Polar Bifunctional Polyimide Enantiomers for Asymmetric Photo‐ and Piezo‐catalysis." Angewandte Chemie, October 7, 2024. http://dx.doi.org/10.1002/ange.202416221.

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Chiral catalysts for asymmetric catalysis represent a crucial research focus in chemistry and materials science. However, a few cases about chiral‐dependent photocatalysts primarily focus on plasmonic noble metals. Particularly, developing chiral nano‐catalysts that can be driven by mechanical energy remains in the blank stage. Herein, organic polymer‐based enantiomers, chiral polar polyimide (PI) microspheric nano‐assembly are synthesized as novel bifunctional catalysts for asymmetric photocatalysis and piezocatalysis. The PI catalyst enantiomers present enantioselectivity towards left‐ and r
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45

Zhang, Yan, Yemeng Sun, Xi Ren, et al. "Chiral Polar Bifunctional Polyimide Enantiomers for Asymmetric Photo‐ and Piezo‐catalysis." Angewandte Chemie International Edition, October 7, 2024. http://dx.doi.org/10.1002/anie.202416221.

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Chiral catalysts for asymmetric catalysis represent a crucial research focus in chemistry and materials science. However, a few cases about chiral‐dependent photocatalysts primarily focus on plasmonic noble metals. Particularly, developing chiral nano‐catalysts that can be driven by mechanical energy remains in the blank stage. Herein, organic polymer‐based enantiomers, chiral polar polyimide (PI) microspheric nano‐assembly are synthesized as novel bifunctional catalysts for asymmetric photocatalysis and piezocatalysis. The PI catalyst enantiomers present enantioselectivity towards left‐ and r
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46

FRANCK, R. W., S. ARGADE, C. S. SUBRAMANIAM, and D. M. FRECHET. "ChemInform Abstract: THE FACE SELECTIVITY DIRECTED BY AN ALLYLIC GROUP OF A DIENE IN THE DIELS-ALDER REACTION IS REVERSED FROM THAT OF A DIENOPHILE." Chemischer Informationsdienst 16, no. 42 (1985). http://dx.doi.org/10.1002/chin.198542091.

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47

Sioud, Salim, Maan Amad, Zhiyong Zhu, Denis Lesage, and Héloïse Dossmann. "Investigation of the mechanism of [M–H]+ ion formation in photoionized N‐alkyl‐substituted thieno[3,4‐c]‐pyrrole‐4,6‐dione derivatives during higher order MSn high‐resolution mass spectrometry." Rapid Communications in Mass Spectrometry 39, no. 2 (2024). http://dx.doi.org/10.1002/rcm.9940.

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Abstract:
RationaleThe mechanism underlying dopant‐assisted atmospheric pressure photoionization's (APPI) formation of ions is unclear and still under debate for many chemical classes. In this study, we reexamined the gas‐phase reaction mechanisms responsible for the generation of [M–H]+ precursor ions, resulting from the loss of a single hydrogen atom, in a series of N‐alkyl‐substituted thieno[3,4‐c]‐pyrrole‐4,6‐dione (TPD) derivatives.MethodsAtmospheric pressure photoionization combined with higher order MS/MSn using high‐resolution mass spectrometry (APPI‐HR‐CID‐MSn) and electronic structure calculat
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