Einloggen

Thematische Bibliographien / Non-Classical Carbocation

Inhaltsverzeichnis

Zeitschriftenartikel
Dissertationen

Auswahl der wissenschaftlichen Literatur zum Thema „Non-Classical Carbocation“

Autor: Grafiati

Veröffentlicht am 24. Mai 2025

Zuletzt aktualisiert am 29. Mai 2025

Geben Sie eine Quelle nach APA, MLA, Chicago, Harvard und anderen Zitierweisen an

Wählen Sie eine Art der Quelle aus:

Machen Sie sich mit den Listen der aktuellen Artikel, Bücher, Dissertationen, Berichten und anderer wissenschaftlichen Quellen zum Thema "Non-Classical Carbocation" bekannt.

Neben jedem Werk im Literaturverzeichnis ist die Option "Zur Bibliographie hinzufügen" verfügbar. Nutzen Sie sie, wird Ihre bibliographische Angabe des gewählten Werkes nach der nötigen Zitierweise (APA, MLA, Harvard, Chicago, Vancouver usw.) automatisch gestaltet.

Sie können auch den vollen Text der wissenschaftlichen Publikation im PDF-Format herunterladen und eine Online-Annotation der Arbeit lesen, wenn die relevanten Parameter in den Metadaten verfügbar sind.

Zeitschriftenartikel zum Thema "Non-Classical Carbocation"

1

Properzi, Roberta, Philip S. J. Kaib, Markus Leutzsch, et al. "Catalytic enantiocontrol over a non-classical carbocation." Nature Chemistry 12, no. 12 (2020): 1174–79. http://dx.doi.org/10.1038/s41557-020-00558-1.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

2

Skvorcova, M., and A. Jirgensons. "Intramolecular cyclopropylmethylation via non-classical carbocations." Organic & Biomolecular Chemistry 15, no. 33 (2017): 6909–12. http://dx.doi.org/10.1039/c7ob01721a.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

3

Hanson, James R. "Skeletal Rearrangements of Rings C and D of the Kaurene and Beyerene Tetracyclic Diterpenoids." Journal of Chemical Research 42, no. 4 (2018): 175–80. http://dx.doi.org/10.3184/174751918x15233039624478.

Der volle Inhalt der Quelle

Annotation:

The skeletal rearrangement of the bicyclo[3.2.1]octane portion of rings C and D of the kaurene and beyerene tetracyclic diterpenoids are reviewed, revealing the tendency of the secondary carbocations to rearrange to tertiary carbocations with the eventual preferential formation of bicyclo[2.2.2]octanes. Under acid-catalysed conditions the variations in the products with the nucleophilicity of the counter ions suggest that the intervention of discrete rather than completely delocalised non-classical carbonium ions may be contributing to the reaction pathway.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

4

Alkorta, Ibon, José Luis M. Abboud, Esther Quintanilla, and Juan Z. Dávalos. "A theoretical study of (old and new) non-classical carbocations derived from cyclic saturated hydrocarbons." Journal of Physical Organic Chemistry 16, no. 8 (2003): 546–54. http://dx.doi.org/10.1002/poc.630.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

5

Allwohn, Jürgen, Ralf Hunold, Monika Pilz, Rolf-Günter Müller, Werner Massa, and Armin Berndt. "Nachweis starker C – Sn-Hyperkonjugation über Kristallstruktur und NMR-Daten eines C-Stannylmethylenborans / Evidence for Strong C–Sn-Hyperconjugation by Crystal Structure and NMR Data of a C-Stannylmethyleneborane." Zeitschrift für Naturforschung B 45, no. 3 (1990): 290–98. http://dx.doi.org/10.1515/znb-1990-0304.

Der volle Inhalt der Quelle

Annotation:

Strong C—Sn hyperconjugation in C-stannylmethyleneborane 3 is indicated by (1) a small B—sp2C—Sn bond angle (105.6°), (2) a long sp2C—Sn bond (216 pm), (3) a very short B=C double bond (131 pm), (4) a very small coupling constant 1J(119Sn-13C) = 125 Hz for the sp2C—Sn bond and (5) shielding of the boron atom of the B=C double bond by 20 ppm as compared to methyleneboranes without strong hyperconjugation. The boron atoms of the B=C double bond of 3 and related methyleneboranes act as π-donor and σ-acceptor, the substituents X at the carbon atom of the B=C double bond as π-acceptors and, through

APA, Harvard, Vancouver, ISO und andere Zitierweisen

6

García-Padilla, Eduardo, Imma Escofet, Feliu Maseras, and Antonio M. Echavarren. "The Puzzling Structure of the Key Intermediates in Gold(I) Catalyzed Cyclizations of Enynes and Allenenes." ChemPlusChem, November 21, 2023. http://dx.doi.org/10.1002/cplu.202300502.

Der volle Inhalt der Quelle

Annotation:

We identify the dominant structures of the intermediates of gold(I)‐catalyzed cyclizations of 1,5‐enynes and 1,5‐allenenes through computational analysis as gold(I) cyclopropylcarbenes, endocyclic vinylgold complexes and previously unreported non‐classical carbocationic minima. In contrast to 1,6‐enynes, the exocyclic carbocations are found to be less stable. Cyclopropylcarbene structures are consistently favoured as the most stable intermediates for all studied substitution patterns. We validate the computational methods used by using DLPNO‐CCSD(T) energies as a benchmark, indicating that the

APA, Harvard, Vancouver, ISO und andere Zitierweisen

7

Chakladar, Saswati, Yi Wang, Thomas Clark, et al. "A mechanism-based inactivator of glycoside hydrolases involving formation of a transient non-classical carbocation." Nature Communications 5, no. 1 (2014). http://dx.doi.org/10.1038/ncomms6590.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

8

Shi, Hong-Song, Jun-An Ma, Ilan Marek, and Fa-Guang Zhang. "Fe‐Catalyzed Stereospecific Intramolecular Friedel–Crafts‐type Reaction of Fluoroalkyl Cyclopropyl Carbinols via Non‐classical Carbocation." Advanced Synthesis & Catalysis, March 11, 2025. https://doi.org/10.1002/adsc.202500242.

Der volle Inhalt der Quelle

Annotation:

Here we describe a Fe‐catalyzed stereospecific intramolecular Friedel–Crafts‐type reaction of polysubstituted stereodefined fluoroalkyl cyclopropyl carbinols. This transformation provides access to a series of fluoroalkyl group‐substituted dihydro‐1H‐indenols bearing three continuous stereogenic centers including two congested tetra‐substituted stereocenters. The key to the realization of this reaction relies on the electronic destabilizing effect of fluoroalkyl group to tune the stability and reactivity of non‐classical cyclopropyl‐carbinyl cation intermediate. Functional group interconversio

APA, Harvard, Vancouver, ISO und andere Zitierweisen

9

Pérez-Guevara, Raquel, Luis Sarandeses, Rosana Alvarez, M. Montserrat Martínez, and José Pérez Sestelo. "Stereospecific Indium(III)‐catalysed tandem cycloisomerization of functionalized 1,6‐enynes: scope and mechanistic insights." Advanced Synthesis & Catalysis, December 24, 2023. http://dx.doi.org/10.1002/adsc.202301329.

Der volle Inhalt der Quelle

Annotation:

Tandem cycloisomerization reactions of functionalized 1,6‐enynes under indium(III) catalysis are described. This atom‐economic transformation proceeds smoothly with 5‐exo‐dig regioselectivity using commercial In(III) halides and 1,6‐enynes furnished with alcohol, carboxylic acid or amine functional groups to give bicyclic structures in good yields and diastereoselectivities. The reaction with enynals involves a three–step mechanism to give an oxatricycle and a conjugated 1,3‐diene. In the absence of the internal nucleophile the enyne cycloisomerization evolves through a skeletal rearrangement

APA, Harvard, Vancouver, ISO und andere Zitierweisen

10

Omdim, Irene Nadage, Kenneth Oben Eyong, Blandine Marlysse Wache Ouahouo, et al. "Selective Electrophile‐Promoted Cyclization Reactions of Lapachol and Evaluation of Bioactive Naphthoquinones Against Cancer Cell Lines." Journal of Heterocyclic Chemistry, December 10, 2024. https://doi.org/10.1002/jhet.4935.

Der volle Inhalt der Quelle

Annotation:

ABSTRACTCyclic ether‐fused tricyclic naphthoquinones are major pharmacophores because of their biological activities. The methodology of construction is either by inter or intra‐molecular cyclization of functionalized naphthoquinones. This reaction includes a wide range of reagents from classical Brønsted to Lewis acids. The choice of appropriate reagent and reaction conditions against the substrate is the key to accomplishing the regio‐ and/or stereo‐selective synthesis of these compounds, though it seems difficult at first glance to decide how because numerous numbers of actual examples have

APA, Harvard, Vancouver, ISO und andere Zitierweisen

Dissertationen zum Thema "Non-Classical Carbocation"

1

Myronova, Veronika. "Νοvel Apprοaches fοr the Stereοselective Cοnstructiοn Οf Challenging Fluοrinated Μοlecules". Electronic Thesis or Diss., Normandie, 2025. http://www.theses.fr/2025NORMR008.

Der volle Inhalt der Quelle

Annotation:

Cette étude de doctorat porte sur la construction de molécules présentant des stéréocentres adjacents incluant des motifs fluorés, un défi actuel en chimie organique. Dans un premier temps, nous avons développé des carbométallations de cyclopropènes contenant un groupe CF3, sous catalyse au cuivre, permettant d’obtenir des cyclopropanes hautement substitués avec une excellente régio- et diastéréosélectivité. La carbométallation se déroule avec une préférence diastéréofaciale anti par rapport au groupe CF3. La configuration relative a été déterminée par RMN du proton et confirmée par diffractio

APA, Harvard, Vancouver, ISO und andere Zitierweisen

Wir bieten Rabatte auf alle Premium-Pläne für Autoren, deren Werke in thematische Literatursammlungen aufgenommen wurden. Kontaktieren Sie uns, um einen einzigartigen Promo-Code zu erhalten!