Bibliografie tematiche / Cyclopropane

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Letteratura scientifica selezionata sul tema "Cyclopropane"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 25 luglio 2025

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Articoli di riviste sul tema "Cyclopropane"

1

Craig, Alexander J., та Bill C. Hawkins. "The Bonding and Reactivity of α-Carbonyl Cyclopropanes". Synthesis 52, № 01 (2019): 27–39. http://dx.doi.org/10.1055/s-0039-1690695.

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Abstract (sommario):
The cyclopropane functionality has been exploited in a myriad of settings that range from total synthesis and methodological chemistry, to medical and materials science. While it has been seen in such a breadth of settings, the typical view of the cyclopropane moiety is that its reactivity is derived primarily from the release of ring strain. While this simplified view is a useful shorthand, it ignores the specific nature of cyclopropyl molecular orbitals. This review aims to present the different facets of cyclopropane bonding by examining the main models that have been used to explain the re
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2

Dent, BR, B. Halton, and AMF Smith. "Synthesis and Trapping of Some Reactive Cyclopropenes." Australian Journal of Chemistry 39, no. 10 (1986): 1621. http://dx.doi.org/10.1071/ch9861621.

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Abstract (sommario):
Commencing with 1,1,2-tribromo-2-trimethylsilylcyclopropane (1d), 1,2- dibromo -and 1-bromo-2-trimethylsilyl-cyclopropene (2d) and (6) are easily prepared. These reactive cyclopropenes decompose on standing at ambient temperature but can be trapped in situ as Diels-Alder adducts (4) and (5). Furthermore, 1,2-bis( trimethylsilyl )- and 1- trimethylsilyl-cyclopropene (8) and (9) can be prepared from cyclopropane (1d) via the bromo - and lithio-trimethylsilylcyclopropenes (6) and (7) in a 'one-pot' procedure and trapped as adducts (4e,f) respectively.
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3

Gemoets, J. P., M. Bravo, C. E. McKenna, G. J. Leigh, and B. E. Smith. "Reduction of cyclopropene by NifV- and wild-type nitrogenases from Klebsiella pneumoniae." Biochemical Journal 258, no. 2 (1989): 487–91. http://dx.doi.org/10.1042/bj2580487.

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The nitrogenase from wild-type Klebsiella pneumoniae reduces cyclopropene to cyclopropane and propene in the ratio 1:2 at pH 7.5. We show in this paper that the nitrogenase from a nifV mutant of K. pneumoniae also reduces cyclopropene to cyclopropane and propene, but the ratio of products is now 1:1.4. However, both nitrogenases exhibit the same Km for cyclopropene (2.1 x 10(4) +/- 0.2 x 10(4) Pa), considerably more than the Km for the analogous reaction with Azotobacter vinelandii nitrogenase under the same conditions (5.1 x 10(3) Pa). Analysis of the data shows that the different product rat
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4

Kohout, Ladislav. "The synthesis of 5,6-cyclopropanocholestanes with oxygen functions in positions 3 and 7." Collection of Czechoslovak Chemical Communications 51, no. 2 (1986): 429–35. http://dx.doi.org/10.1135/cccc19860429.

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Abstract (sommario):
The Simmons-Smith methylenation of the double bond in 3β-acetoxycholest-5-en-7-ols takes place selectively under formation of an adduct the configuration of which is determined by the configuration of the 7-hydroxyl group: 7β-alcohol IV gave 5β,6β-cyclopropane derivative VI, 7α-alcohol V gave 5α,6α-cyclopropane derivative VIII. On photochemically initiated cyclization of 3β-acetoxy-B-homo-5-en-7a-one (XIII) we obtained the product with an α-cyclopropane ring exclusively, i.e. 3β-acetoxy-5,6α-cyclopropano-5α-cholestan-7-one (XII).
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5

Ben Hamadi, Naoufel, and Ahlem Guesmi. "Synthesis of New Spiro-Cyclopropanes Prepared by Non-Stabilized Diazoalkane Exhibiting an Extremely High Insecticidal Activity." Molecules 27, no. 8 (2022): 2470. http://dx.doi.org/10.3390/molecules27082470.

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The synthesis of new insecticidal gem-dimethyspiro-cyclopropanes derived from pyrrolidine-2,3-dione have been described, and their biological effect against different insect species has been evaluated. The presented results demonstrate the excellent insecticidal activity of cyclopropane 5c against Aedes aegypti and Musca domestica. Cyclopropane 5c showed the quickest knockdown and the best killing against Aedes aegypti and Musca domestica compared to trans-chrysanthemic acid and pyrethrin. The biological results of the high insecticidal activity were confirmed by the results of docking. This i
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6

Singh, Satya Prakash, and Pompozhi Protasis Thankachan. "Hydroboration of Substituted Cyclopropane: A Density Functional Theory Study." Advances in Chemistry 2014 (August 18, 2014): 1–7. http://dx.doi.org/10.1155/2014/427396.

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Abstract (sommario):
The hydroboration of substituted cyclopropanes has been investigated using the B3LYP density functional method employing 6-31G** basis set. Borane moiety approaching the cyclopropane ring has been reported. It is shown that the reaction proceeds via a three-centered, “loose” and “tight,” transition states when boron added to the cyclopropane across a bond to a substituents. Single point calculations at higher levels of theory were also performed at the geometries optimized at the B3LYP level, but only slight changes in the barriers were observed. Structural parameters for the transition state
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7

Trudeau, Stéphane, and Pierre Deslongchamps. "Novel synthesis of a highly functionalized cyclopropane derivative." Canadian Journal of Chemistry 81, no. 9 (2003): 1003–11. http://dx.doi.org/10.1139/v03-119.

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A model study was carried out to explore the feasibility of synthesizing fused tricyclic ring structures containing a C7—C8 double bond juncture (steroid numbering) by employing an SN2' cyclization of a silyl enol ether to displace an allylic acetate as the key step. Instead of the anticipated product, highly functionalized cyclopropanes were obtained. These novel cyclopropane structures are the result of the concomitant 1,2-migration of a dithiane thioether moiety and the eventual displacement of the acetate group, followed by the cyclization of the silyl enol ether.Key words: tricycles, SN2'
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Fadeev, Alexander A., Alexey O. Chagarovskiy, Anton S. Makarov, et al. "Synthesis of (Het)aryl 2-(2-hydroxyaryl)cyclopropyl Ketones." Molecules 25, no. 23 (2020): 5748. http://dx.doi.org/10.3390/molecules25235748.

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A simple general method for the synthesis of 1-acyl-2-(ortho-hydroxyaryl)cyclopropanes, which belong to the donor–acceptor cyclopropane family, has been developed. This method, based on the Corey–Chaykovsky cyclopropanation of 2-hydroxychalcones, allows for the preparation of a large diversity of hydroxy-substituted cyclopropanes, which can serve as promising building blocks for the synthesis of various bioactive compounds.
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9

Ramnauth, Jailall, and Edward Lee-Ruff. "Photodecarbonylation of chiral cyclobutanones." Canadian Journal of Chemistry 75, no. 5 (1997): 518–22. http://dx.doi.org/10.1139/v97-060.

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Triplet photosensitized irradiation of 2(S),3(R)-bis[(benzoyloxy)methyl]cyclobutanone gave optically pure (−)E-1(S),2(S)-bis(benzoyloxymethyl)cyclopropane as a major product in the nonpolar fraction along with its stereoisomer and cycloelimination products. The absolute stereochemistry of the chiral cyclopropane was established by independent synthesis and X-ray crystal structure determination of a synthetic precursor. The distribution of decarbonylation and cycloelimination products was inversely dependent on the concentration of the substrate. Irradiation of the same ketone in tetrahydrofura
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10

Finta, Zoltán, Zoltán Hell, Agnieszka Cwik, and László Tőke. "A Simple Synthesis of 1,1,2-tris-(Hydroxymethyl)-Cyclopropane and Its Dihalo Derivatives." Journal of Chemical Research 2002, no. 9 (2002): 459–60. http://dx.doi.org/10.3184/030823402103172653.

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The phase transfer catalytic cyclopropanation of the malonic ester of allylic alcohol or its 3,3-dibromo and 3,3-dichloro derivatives yields bicyclic cyclopropane carboxylic acid lactones; reduction of these lactones with LiAlH4 in boiling THF yields the appropriate 1,1,2-tris-(hydroxymethyl)cyclopropanes in satisfactory yield.
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Tesi sul tema "Cyclopropane"

1

Watson, Hayley. "Synthesis and reactivity of cyclopropanes and cyclopropenes." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/9032.

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Abstract (sommario):
Activated cyclopropanes have been extensively used in synthetic chemistry as precursors for cycloaddition reactions. The rationale behind this is their ability to undergo ring-opening when activated by a Lewis acid, this can be enhanced further by the presence of a carbocation stabilising group like electron-rich aromatics. The stabilised dipole formed after ring opening can be trapped with suitable electrophiles such as imines and aldehydes via a [3+2] cycloaddition reaction. This results in the synthesis of pyrrolidines and tetrahydrofurans in excellent yields but moderate diastereoselectivi
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Huber, Florian Anton Martin. "Stereocontrolled cyclopropane synthesis." Thesis, Bangor University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297672.

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Pedersen, Daniel Sejer. "Asymmetric cyclopropane synthesis." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613762.

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Licence, Peter. "Synthetic studies in cyclopropane chemistry." Thesis, Bangor University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364988.

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Thomas, Stephen Patrick. "Phosphorus mediated asymmetric cyclopropane synthesis." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613118.

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Dollet, Raphael. "Νοuvelles méthοdοlοgies de synthèse de cycles carbοnés à trοis et quatre chainοns par biοcatalyse et phοtοchimie". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMIR27.

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Abstract (sommario):
Parmi l’ensemble des carbocyles possibles en chimie organique, les cycles à trois ou quatre chaînons d’atomes de carbone (cyclopropane et cyclobutane) sont présents dans de nombreuses molécules naturelles mais également dans des médicaments ou composés bioactifs. En raison de leur structure qui confère une rigidité structurale aux molécules, ils ont une influence sur les propriétés pharmacologiques de ces dernières, notamment par une modification de la lipophilie ou de la stabilité métabolique. De la métallo-catalyse à la photochimie, en passant par la biocatalyse, de nombreuses voies, racémiq
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Glen, Anthony D. "Synthetic studies on cyclopropane fatty acids." Thesis, University of Newcastle Upon Tyne, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386040.

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8

Phun, Lien Hoang. "Innovative approaches to carbocyclic and heterocyclic compounds using strained carbocycles." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47542.

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Abstract (sommario):
Natural products and small molecules play a major role in drug development. However, using natural products as a source of medicine comes with many challenges, such as lack of natural abundance and difficulty in isolation. Consequently, synthetic organic chemistry is a solution in order to access these compounds in usable quantities. However, synthetic chemisty comes with its own challenges such as efficiency, chemoselectivity, stereoselectivity and enantioselectivity. Therefore, synthetic tools that addresses these challenges are required solve these limitations. This thesis discusses new met
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9

Walther, Stefan. "Cyclopropane als Edukte zur Synthese von Calicenen /." [S.l : s.n.], 1985. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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Tarwade, Vinod. "Directed carbozincation reactions of cyclopropene derivatives." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 210 p, 2010. http://proquest.umi.com/pqdweb?did=1993336541&sid=7&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Libri sul tema "Cyclopropane"

1

Boche, Gernot. Cyclopropane derived reactive intermediates. Wiley, 1990.

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2

Boche, G. Cyclopropane derived reactive intermediates. Wiley, 1990.

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Boche, G., and H. M. Walborsky, eds. Cyclopropane Derived Reactive Intermediates (1990). John Wiley & Sons, Inc., 1990. http://dx.doi.org/10.1002/9780470772409.

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4

Rush, Stephen Howard. Palladium(II)-catalysed polymerisation of 3,3-disubtituted cyclopropenes. University College Dublin, 1996.

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5

Kulinkovich, Oleg G. Cyclopropanes in organic synthesis. John Wiley & Sons, Inc., 2015.

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6

Zvi, Rappoport, ed. The chemistry of the cyclopropyl group. Wiley, 1987.

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7

Netherlands. Werkgroep van Deskundigen ter Vaststelling van MAC-Waarden. Enflurane, isoflurane, and cyclopropane: Health based recommended occupational exposure limits : report of the Dutch Expert Committee on Occupational Standards, a committee of the Health Council of the Netherlands. Health Council of the Netherlands, 1998.

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8

Hannover, Universität, ed. Darstellung substituierter Cyclopropane aus (j3-Allyl)palladium-Komplexen [(Eta3-Allyl)palladium-Komplexen] und Isolierung eines Palladacyclobutans. [s.n.], 1994.

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9

Kulinkovich, Oleg G. Cyclopropanes in Organic Synthesis. John Wiley & Sons, Inc, 2015. http://dx.doi.org/10.1002/9781118978429.

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1938-, McKervey M. Anthony, and Ye Tao 1963-, eds. Modern catalytic methods for organic synthesis with diazo compounds: From cyclopropanes to ylides. Wiley, 1998.

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Capitoli di libri sul tema "Cyclopropane"

1

Hirota, E., K. Kuchitsu, T. Steimle, J. Vogt, and N. Vogt. "32 C3H6 Cyclopropane." In Molecules Containing Three or Four Carbon Atoms and Molecules Containing Five or More Carbon Atoms. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41504-3_33.

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2

Cabaco, M. I., M. Besnard, M. C. Bellissent-Funel, Y. Guissani, and B. Guillot. "Structure of Liquid Cyclopropane." In Molecular Liquids: New Perspectives in Physics and Chemistry. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2832-2_28.

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Demaison, J. "456 C4H7Cl (Chloromethyl)cyclopropane." In Asymmetric Top Molecules. Part 2. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-10400-8_204.

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Schomburg, Dietmar, and Dörte Stephan. "Cyclopropane-fatty-acyl-phospholipid synthase." In Enzyme Handbook 11. Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-61030-1_76.

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Winkelmann, J. "Diffusion of helium (1); cyclopropane (2)." In Gases in Gases, Liquids and their Mixtures. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-49718-9_187.

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Winkelmann, J. "Diffusion of helium (1); cyclopropane (2)." In Gases in Gases, Liquids and their Mixtures. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-49718-9_356.

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Winkelmann, J. "Diffusion of cyclopropane (1); air (2)." In Gases in Gases, Liquids and their Mixtures. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-49718-9_630.

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Bamforth, Betty J. "Cyclopropane Anesthesia: Its Introduction at Wisconsin." In Anaesthesia. Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-69636-7_58.

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Demaison, J. "65 C3H6Ar Cyclopropane – argon (1/1)." In Symmetric Top Molecules. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-47532-3_67.

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Demaison, J. "66 C3H6Kr Cyclopropane – krypton (1/1)." In Symmetric Top Molecules. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-47532-3_68.

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Atti di convegni sul tema "Cyclopropane"

1

Kostić, Marina D., Jovana S. Marjanović, Sven Mangelinckx, and Vera M. Divac. "In silico Drug-Likeness, Pharmacokinetic and other ADME properties of 2- (aminomethyl)cyclopropane-1,1-dicarboxylic acid." In 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.455k.

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Herein we present the results of in silico determination of Drug-Likeness, Pharmacokinetic and other ADME properties of 2-(aminomethyl)cyclopropane-1,1-dicarboxylic acid as an example constrained γ-amino dicarboxylic acid. The results of in silico screening of drug-likeness, pharmacokinetic and other ADME (absorption, distribution, metabolism and elimination) properties of 2-(aminomethyl)cyclopropane-1,1-dicarboxylic acid have revealed that this compound is not able to cross the blood-brain barrier, but it shows good solubility and gastrointestinal absorption. The possible target screening has
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2

Irzooqi, Wisam Shareef, Riyam H. Ali, and Hamid Ibrahim Abbood. "Density functional theory calculations for pure 3 cyclopropane and 3 cyclopropane-Ag, Al, C, Au, P and Y interactions." In PHYSICAL MESOMECHANICS OF CONDENSED MATTER: Physical Principles of Multiscale Structure Formation and the Mechanisms of Nonlinear Behavior: MESO2022. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0157093.

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Kostić, Marina, Vera Divac, and Sven Mangelinckx. "SYNTHESIS AND CHARACTERIZATION OF PALLADIUM (II)–2- (AZIDOMETHYL)CYCLOPROPANE-1,1-DICARBOXYLIC ACID COMPLEX." In 1st INTERNATIONAL Conference on Chemo and BioInformatics. Institute for Information Technologies, University of Kragujevac, 2021. http://dx.doi.org/10.46793/iccbi21.297k.

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The discovery that palladium complexes possess a wide range of biological activities (from antitumor, -viral, -malarial, -fungal to antimicrobial activities) encourages further research in this scientific field. Herein we describe the synthesis and characterization of a novel palladium (II) complex, using [Pd(dien)Cl]Cl and 2-(azidomethyl)cyclopropane-1,1-dicarboxylic acid (azmcpda) as a ligand. [Pd(dien)Cl]Cl was selected as a starting material taking into consideration its importance as a model for the investigation of the substitution reactions in coordination chemistry and a deeper underst
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Kostić, Marina, Vera M. Divac, Sven Mangelinckx, and Jovana S. Marjanović. "BSA binding of 2-(aminomethyl)cyclopropane-1,1-dicarboxylic acid." In 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.459k.

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Herein, we present the results of the study devoted to the exploration of BSA binding of 2-(aminomethyl)cyclopropane-1,1-dicarboxylic acid, as an example of constrained γ-amino dicarboxylic acid, and, taking into consideration that the effectiveness of a potential drug depends on its ability to bind to a protein carrier and in that way enable transfer through the blood stream. For the investigation of binding properties, we used the fluorescence emission titration of BSA with a synthesized compound. Considering that the BSA solution shows an intensive fluorescence emission around 360 nm, a dec
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Hou, Shanshan, Yuanzhang Zhou, Wei Lu, Jiaqian Han, Ziwei Zhang, and Shan Xu. "Synthesis of 3-(4-aminophenyl) cyclopropane-1, 1,2,2-tetracarbonitrile." In 2016 4th International Conference on Mechanical Materials and Manufacturing Engineering. Atlantis Press, 2016. http://dx.doi.org/10.2991/mmme-16.2016.92.

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Nagata, Makoto, Nanase Ochiai, Akiko Yoshida, Satoshi Shuto, and Mizuki Watanabe. "Development of Cyclopropane-Based Foldamers Mimicking Protein Secondary Structures." In 37th European Peptide Symposium. The European Peptide Society, 2024. http://dx.doi.org/10.17952/37eps.2024.p2250.

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7

Marin-Luna, Marta, Belen Martinez-Gualda, Mateo Alajarin, and Angel Vidal. "Exploring cyclopropane-heterocumulene [3 + 2] intramolecular cycloadditions on ortho-benzylydene scaffolds." In The 17th International Electronic Conference on Synthetic Organic Chemistry. MDPI, 2013. http://dx.doi.org/10.3390/ecsoc-17-a024.

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Zhou, Zhihui, Yiling Zhang, Jie He, Jianqing Zhang, Qinrong Jiang, and Shan Xu. "Synthesis of N-(4-fluorophenyl)-1-(pyrrolidine-1-carbonyl) cyclopropane-1-carboxamide." In 3RD INTERNATIONAL CONFERENCE ON FRONTIERS OF BIOLOGICAL SCIENCES AND ENGINEERING (FBSE 2020). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0048414.

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Wood, Samuel, Robert McMahon, R. Woods, Brian Esselman, and Samuel Kougias. "PHOTOCHEMISTRY OF CYANOMETHYLENE CYCLOPROPANE (C5H5N) IN A LOW TEMPERATURE RARE GAS MATRIX." In 2022 International Symposium on Molecular Spectroscopy. University of Illinois at Urbana-Champaign, 2022. http://dx.doi.org/10.15278/isms.2022.tj08.

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Wood, Samuel, and Robert McMahon. "PHOTOISOMERIZATION OF (CYANOMETHYLENE)CYCLOPROPANE (C5H5N) IN A LOW TEMPERATURE RARE GAS MATRIX." In 2023 International Symposium on Molecular Spectroscopy. University of Illinois at Urbana-Champaign, 2023. http://dx.doi.org/10.15278/isms.2023.6884.

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Rapporti di organizzazioni sul tema "Cyclopropane"

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Pesis, Edna, and Mikal Saltveit. Postharvest Delay of Fruit Ripening by Metabolites of Anaerobic Respiration: Acetaldehyde and Ethanol. United States Department of Agriculture, 1995. http://dx.doi.org/10.32747/1995.7604923.bard.

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The use of pretreatments for 24 h prior to storage, under anaerobic condtions, or in the presence of the natural metabolic products, acetaldehyde (AA) and ethanol, to delay fruit ripening, was found to be effective with several climacteric fruits, among them avocado, mango, peach and tomato. The delay in ripening of avocado, peach and tomato was accompanied by inhibition of ethylene production and of fruit softening. The maintenance of fruit firmness was associated with a decrease in the activities of cell-wall-degrading enzymes, including endoglucanases (Cx), polygalacturonases (PG) and b-gal
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2

Sisler, Edward C., Raphael Goren, and Akiva Apelbaum. Controlling Ethylene Responses in Horticultural Crops at the Receptor Level. United States Department of Agriculture, 2001. http://dx.doi.org/10.32747/2001.7580668.bard.

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Ethylene is a plant hormone that controls many plant responses, such as growth, senescence, ripening, abscission and seed germination. Recently, 1-methy- cyclopropene (1-MCP), was shown to bind to ethylene receptor for a certain period of time and prevent ethylene action. The objectives of this research were to synthesize analogues of 1-MCP and test their potency to block the ethylene receptor and inhibit ethylene action. During the course of this project, procedures for synthesis and shipment of the cyclopropene compounds were developed as well assay procedures for each compound were worked o
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