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Journal articles on the topic 'Analogous reaction'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Kantlehner, Willi, Hansjörg Lehmann, Rüdiger Stieglitz, and Wolfgang Frey. "Orthoamide und Iminiumsalze, XCVI. Push-pull-substituierte 1,3,5-Hexatriene aus Orthoamiden von Alkincarbonsäuren und Birckenbach-analogen Acetophenonen." Zeitschrift für Naturforschung B 74, no. 11-12 (2019): 913–24. http://dx.doi.org/10.1515/znb-2019-0077.

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AbstractFrom acetone and the orthoamide of phenylpropiolic acid (21b) N,N-dimethyl-phenylpropiolic acid amide (24) is formed. In contrast, the reaction of chloroacetone (28) with 21b results in the vinylogous guanidinium chloride 29. Unexpectedly, the Birckenbach-analogoue ethyl methyl ketone (34) reacts with the orthoamide 21b to give the push-pull-substituted butadiene 36. In contrast to this observation, the reaction of the Birckenbach-analogous acetophenones 30 with the orthoamides 21a–c delivers the push-pull-substituted 1,3,5-hexatrienes 31a–j.

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2

Onge, Brent, and James Green. "Nicholas Reactions of Alkynyl- and Alkenyltrifluoroborates." Synlett 28, no. 20 (2017): 2923–27. http://dx.doi.org/10.1055/s-0036-1588528.

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The Lewis acid mediated Nicholas reaction of potassium alkynyltrifluoroborates and propargyl acetate-hexacarbonyldicobalt complexes affords 1,4-diyne dicobalt hexacarbonyl complexes in good yields. The analogous Nicholas reactions of potassium alkenyltrifluoroborates give 1,3-enyne dicobalt hexacarbonyl complexes in most cases, although the initial site of reaction can vary. Potassium vinyltrifluoroborate itself affords alkynylcyclopropane complexes.

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3

Chen, Mao, and Jeremiah A. Johnson. "Improving photo-controlled living radical polymerization from trithiocarbonates through the use of continuous-flow techniques." Chemical Communications 51, no. 31 (2015): 6742–45. http://dx.doi.org/10.1039/c5cc01562f.

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Herein, we report simple flow reactor designs that enable photo-controlled living radical polymerization (photo-CRP) from trithiocarbonates (TTCs) with significant enhancements in scalability and reaction rates compared to the analogous batch reactions.

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4

Augustín, Jozef, and Štefan Baláž. "Kinetic analysis of competitive reactions of isothiocyanates with hydroxyl and alkoxide ions." Collection of Czechoslovak Chemical Communications 52, no. 2 (1987): 443–52. http://dx.doi.org/10.1135/cccc19870443.

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The reaction of isothiocyanates with hydroxyl and alkoxide ions has been followed spectrophotometrically in alkaline aqueous-alcoholic solutions. Both the nucleophiles are added to the carbon atom of isothiocyanate group in a competition reaction. The effects of concentration of the nucleophiles, temperature, and acid-base properties of the alcoholic group have been followed on the reaction course. The possibility of analogous reactions in real biological systems is discussed.

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5

Protiva, Jiří, Thi Thu Huong Nguyen, Jiří Urban та Eva Klinotová. "Reactions of 21-Acetoxy-16α,17α-epoxypregn-4-ene-3,20-dione with Nitrogen-Containing Nucleophilic Agents". Collection of Czechoslovak Chemical Communications 62, № 7 (1997): 1095–104. http://dx.doi.org/10.1135/cccc19971095.

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21-Acetoxy-16α,17α-epoxypregn-4-ene-3,20-dione (1) enters a reaction with acetonitrile catalyzed by perchloric acid, giving unusual products with the furostane skeleton. In contrast to analogous reactions, the reaction with sodium azide results in the azido derivative possessing the non-rearranged ring D. The 1H NMR, 13C NMR, and mass spectra are discussed.

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6

Zamora, Rosario, and Francisco J. Hidalgo. "2-Amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) formation and fate: an example of the coordinate contribution of lipid oxidation and Maillard reaction to the production and elimination of processing-related food toxicants." RSC Advances 5, no. 13 (2015): 9709–21. http://dx.doi.org/10.1039/c4ra15371e.

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Major chemical reactions dealing with carbonyl chemistry in foods (Maillard reaction and lipid oxidation) play a role in PhIP formation and fate, pointing to this and analogous heterocyclic aromatic amines as outcomes of this chemistry.

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7

Christensen, P. A., Z. T. A. W. Mashhadani, Abd Halim Bin Md Ali, D. A. C. Manning, M. A. Carroll, and P. A. Martin. "An in situ FTIR study of the plasma- and thermally-driven reaction of isopropyl alcohol at CeO2: evidence for a loose transition state involving Ce3+?" Physical Chemistry Chemical Physics 21, no. 3 (2019): 1354–66. http://dx.doi.org/10.1039/c8cp05983g.

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This paper reports on the thermally-driven and non-thermal plasma-driven reaction of IsoPropyl Alcohol (IPA) on ceria (CeO<sub>2</sub>) with the aim to investigate the differences between plasma catalytic interactions and the analogous thermal reactions.

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8

Zhang, Xinyuan, Xiaoting Chen, Yan Lin, et al. "Probing the Potential Energy Profile of the I + (H2O)3 → HI + (H2O)2OH Forward and Reverse Reactions: High Level CCSD(T) Studies with Spin-Orbit Coupling Included." Molecules 28, no. 2 (2023): 904. http://dx.doi.org/10.3390/molecules28020904.

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Three different pathways for the atomic iodine plus water trimer reaction I + (H2O)3 → HI + (H2O)2OH were preliminarily examined by the DFT-MPW1K method. Related to previous predictions for the F/Cl/Br + (H2O)3 reactions, three pathways for the I + (H2O)3 reaction are linked in terms of geometry and energetics. To legitimize the results, the “gold standard” CCSD(T) method was employed to investigate the lowest-lying pathway with the correlation-consistent polarized valence basis set up to cc-pVQZ(-PP). According to the CCSD(T)/cc-pVQZ(-PP)//CCSD(T)/cc-pVTZ(-PP) results, the I + (H2O)3 → HI + (

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9

Crespo, Lívia T. C., Mônica R. Senra, Pierre M. Esteves та Marcio C. S. de Mattos. "Tribromoisocyanuric Acid as a Green Cohalogenating Reagent: An Efficient Transformation of Alkynes into α,α-Dibromoketones and Vicinal Dibromoalkenes". Letters in Organic Chemistry 16, № 8 (2019): 627–32. http://dx.doi.org/10.2174/1570178615666180803152951.

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The co-halogenation reaction of alkynes with tri-bromoisocyanuric acid in acetic acid, followed by aqueous work-up produced α,α-di-bromoketones (44-84%), while the reaction in aqueous acetonitrile in the presence of KBr produced vicinal di-bromoalkenes (66-86%). The usefulness of the methodology was demonstrated employing green metrics for the comparison of TBCA with analogous N-halo reagents in co-halogenation reactions of alkynes.

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10

Kunitskaya, Larisa, Tatyata Zheltonozhskaya, and Tatyana Rechun. "Polymer-Analogous Transformations in Triblock Copolymers Containing Polyacrylamide and Poly(ethylene oxide)." French-Ukrainian Journal of Chemistry 3, no. 2 (2015): 140–45. http://dx.doi.org/10.17721/fujcv3i2p140-145.

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The polymer-analogous conversion of triblock copolymers (TBC) PAAm-b-PEO-b-PAAm by the aminomethylation reaction in PAAm blocks under the effect of dimethylamine and formaldehyde (Mannich’s reaction) was studied. Kinetic investigations of the Mannich’s reaction in TBC as compared to that in pure PAAm were performed by potentiometric titration. The existence of two competitive polymer-analogous transformations in PAAm chains of all the (co)polymers such as aminomethylation and alkaline hydrolysis of amide groups was established and discussed.

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11

Castro Vega, Alejandro Amadeus, Luis Ignacio Rodríguez Varela, and José de Jesús Díaz Velásquez. "Subcritical hydrothermal conversion of organic wastes and biomass. Reaction pathways." Ingeniería e Investigación 27, no. 1 (2007): 41–50. http://dx.doi.org/10.15446/ing.investig.v27n1.14777.

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Hydrothermal conversion is a procedure which emulates organic matter’s natural conversion into bio-crude having physical and chemical properties analogous to petroleum. The artificial transformation of biomass requires previous knowledge of the main reaction routes and product availability. The main component of biomass (depolymerisation by hydrolysis) is presented in hydrothermal cellulose conversion, producing oligosaccharides which exhibit dehydration and retro-aldol condensation reactions for transforming into furfurals and carboxylic acids. Other biomass components (such as lignin, protei

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12

Stanley, A. E., and S. E. Godbey. "The Laser-Induced Nitrations of Several Hydrocarbons." Applied Spectroscopy 43, no. 4 (1989): 674–81. http://dx.doi.org/10.1366/0003702894202508.

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The Army uses nitrated compounds as explosives and propellants. The ability to selectively nitrate materials is a much-needed process. Laser-induced chemistry possesses the potential to drive some reactions in an efficient and selective manner. Laser-induced chemistry may be useful in driving nitration reactions toward specific products. Reported herein are the results of several successful attempts to laser-induce the reaction of nitrogen dioxide with hydrocarbons of 3, 4, and 5 carbons. Specifically, the tunable continuous wave (cw) infrared laser was used to drive the reaction between nitro

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13

Macháček, Vladimír, Vojeslav Štěrba, and Antonín Lyčka. "Mechanism of the reaction of 1-methoxy- and 1-chloro-2,4,6-trinitrobenzene with dimethyl malonate anion." Collection of Czechoslovak Chemical Communications 52, no. 1 (1987): 132–39. http://dx.doi.org/10.1135/cccc19870132.

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1H NMR spectra have been used to prove the formation of 1,3- and 1,1-adducts in the reaction of 1-methoxy-2,4,6-trinitrobenzene with dimethyl malonate anion and formation of 1,3-adduct in the analogous reaction of 1-chloro-2,4,6-trinitrobenzene. Dimethyl 2,4,6-trinitrophenylmalonate is formed from 1-chloro-2,4,6-trinitrobenzene at the same rate and by the same mechanism as the 1,1-adduct from 1-methoxy-2,4,6-trinitrobenzene. The two reactions only differ in their rate-limiting steps.

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14

Turowska-Tyrk, Ilona, Elżbieta Trzop, John R. Scheffer, and Shuang Chen. "Monitoring structural transformations in crystals. 8. Monitoring molecules and a reaction center during a solid-state Yang photocyclization." Acta Crystallographica Section B Structural Science 62, no. 1 (2006): 128–34. http://dx.doi.org/10.1107/s0108768105034014.

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Structural changes taking place in a crystal during an intramolecular photochemical reaction [the Yang photocyclization of the α-methylbenzylamine salt with 1-(4-carboxybenzoyl)-1-methyladamantane] were monitored step-by-step using X-ray structure analysis. This is the first example of such a study carried out for an intramolecular photochemical reaction. During the photoreaction, both the reactant and product molecules change their orientation, but the reactant changes more rapidly after the reaction is about 80% complete. The distance between directly reacting atoms in the reactant molecule

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15

Frank, Walter, Björn Gelhausen, Guido J. Reiß, and Risto Salzer. "Untersuchungen an Systemen des Typs PCl3/MCl3/Aren (M = Al, Ga), I. Reaktionen mit Monohalogenbenzolen; Multikern-NMR-spektroskopische Charakterisierung von Aryldichlorhydrogenphosphoniumsalzen; Struktur des para-Fluorphenyldichlorphosphonium-tetrachloroaluminats." Zeitschrift für Naturforschung B 53, no. 10 (1998): 1149–68. http://dx.doi.org/10.1515/znb-1998-1025.

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AbstractThe reactions of the monohalobenzenes with AlCl3 (GaCl3) and PCl3 have been monitored by 31P NMR spectroscopy. Primary product of the reaction with fluorobenzene and AlCl3 is the thermolabile para-fluorophenyldichlorophosphonium tetrachloroaluminate, which was characterized by 1H, 13C, 19F, 27Al and 31P NMR spectroscopy as well as by a crystal structure analysis (space group P21/c, a = 7.0720(10), b = 12.659(3), c = 15.413(3) Å, ß = 90.93(3)°, Z = 4, T = -110 °C). For the phosphonium ion we found a very good agreement of the experimental structural parameters and those obtained by ab i

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16

Corlan, Alexandru Dan, and John Ross. "Kinetics methods for clinical epidemiology problems." Proceedings of the National Academy of Sciences 112, no. 46 (2015): 14150–55. http://dx.doi.org/10.1073/pnas.1510927112.

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Calculating the probability of each possible outcome for a patient at any time in the future is currently possible only in the simplest cases: short-term prediction in acute diseases of otherwise healthy persons. This problem is to some extent analogous to predicting the concentrations of species in a reactor when knowing initial concentrations and after examining reaction rates at the individual molecule level. The existing theoretical framework behind predicting contagion and the immediate outcome of acute diseases in previously healthy individuals is largely analogous to deterministic kinet

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17

Lins, Francisco Furtado Tavares, Lázaro Pereira da Cunha, Yvone Brígido Memória Pouliquen, Telma Leda Gomes Lemos та Marcos Carlos de Mattos. "Diastereoselectivity in the Synthesis of Unnatural α-Amino Acid Esters by Phase Transfer Catalysis". Zeitschrift für Naturforschung B 59, № 3 (2004): 305–9. http://dx.doi.org/10.1515/znb-2004-0312.

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Two unnatural α-amino acid esters were prepared in good yields via phase transfer catalyzed Michael addition of ethyl N-acetylaminocyanoacetate to chalcone and benzalketone. For both α- enones, a progressive increase in product diastereomeric excess (d.e.) was observed during the course of reaction, even in the absence of quaternary ammonium salt. However, for a fixed reaction time, higher d.e. values were obtained under phase transfer catalytic condition. Analogous reactions were performed using S-aryl thiocinnamates as Michael acceptors, affording a 2-pyrrolidinone in good yield but low d.e.

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18

Neumann, U., T. Steinmetzer, A. Barth, and H. U. Demuth. "Reaction of Dipeptidylpeptidase IV with Substrate-Analogous Azapeptides." Journal of Enzyme Inhibition 4, no. 3 (1991): 213–26. http://dx.doi.org/10.3109/14756369109035845.

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19

Tandra, Das, Sankar De Gauri, and Kumar Ghosh Alak. "Kinetics and mechanism of substitution studies on cis-diaqua-bis(bipyridyl)ruthenium(II) by dimethylglyoxime in 10% (v/v) ethanol." Journal of Indian Chemical Society Vol. 78, Sep 2001 (2001): 451–54. https://doi.org/10.5281/zenodo.5912529.

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Department of Chemistry, University of Burdwan, Burdwan-713 104, India <em>Fax </em>: 91-0342-64452 Department of Chemistry, Regional Engineering College, Durgapur-713 209, India <em>Manuscript received 29 October 1999, revised I January 2001, accepted 24 March 2001</em> Deaquation rate of <em>cis</em>-diaqua-bis(bipyridyl)ruthenium(ll) by dimethylglyoxime in 10% (v/v) ethanol is independent of pH but increases with increasing [dmgH<sub>2</sub>] and approaches a limiting value at higher [ligand]. The activation parameters have been compared with other analogous systems. The reaction rates are

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20

S. TirumalaJagadeesh and N.V.S.Venugopal. "DESIGNED SYNTHESIS AND BIOEVOLUTION OF A NOVEL ANALOGOUS OF THIADIAZOLO [3, 2-A] PYRIMIDINE-6- CARBOXYLATE PROMOTED BY TRANSITION METAL ACETATES." RASAYAN Journal of Chemistry 18, no. 03 (2025): 1252–60. https://doi.org/10.31788/rjc.2025.1839308.

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In a novel series of [1, 3, 4] thiadiazol-2-amine, a simple new pathway and biological approach, the analogues of Imidazole [3, 2-a] pyrimidine-6-carboxylate (5a-5q). These analogous were obtained by the reaction of intermediate (3) with ethylacetoacetate and substituted aryl aldehydes in the presence of transition metal acetates, while the reaction between thiosemicarbazide and indole-3-carboxylic acid occurs in the presence of protic acid scaffold compound (3). The newly derived compounds are characterised by advanced spectral analysis, including 1H NMR, 13C NMR, and LC-MS. When compared to

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21

Hämmer, Matthias, Florian Pielnhofer, Oliver Janka, et al. "Polymorphism and optical, magnetic and thermal properties of the either phyllo- or inosilicate-analogous borosulfate Cu[B₂(SO₄)₄]." Dalton Transactions 51, no. 8 (2022): 3104–15. http://dx.doi.org/10.1039/d1dt04090a.

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Reaction of Cu2[(OH)2CO3], H3BO3 and oleum yields either inosilicate-analogous α-Cu[B2(SO4)4] or the new phyllosilicate-analogous β-Cu[B2(SO4)4], both subject to Jahn–Teller distortion; two polymorphs of Cu(HSO4)2 and Cu[S2O7] are also reported.

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22

Danihel, Ivan, Falk Barnikol, and Pavol Kristian. "Kinetics of reactions of para-substituted phenyl isocyanates with amines and alcohols." Collection of Czechoslovak Chemical Communications 56, no. 8 (1991): 1662–70. http://dx.doi.org/10.1135/cccc19911662.

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The reaction of para-substituted phenyl isocyanates with amines and alcohols was studied by stopped-flow method. The Hammett correlation obtained showed that the sensitivity of the above mentioned reactions toward substituent effects is the same as that of analogous reactions of phenyl isothiocyanates (ρ ~ 2). The rate constants of these reactions were found to be affected more by steric effects than by solvent effects. An one step multicentre mechanism with partial charges in transition state has been proposed for the title reactions.

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23

Litschel, Thomas, Michael M. Norton, Vardges Tserunyan, and Seth Fraden. "Engineering reaction–diffusion networks with properties of neural tissue." Lab on a Chip 18, no. 5 (2018): 714–22. http://dx.doi.org/10.1039/c7lc01187c.

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24

Kraus, Harald, and Kurt Merzweiler. "Synthese und Kristallstrukturen der neuen Zinn-Chalkogen-Vierringe [{Cp(Ph3P)Ni}2Cl2Sn2E2] (E = Se, S) / Synthesis and Crystal Structures of the New Four-M em bered Tin-Chalcogen Rings [{Cp(Ph3P)Ni}2Cl2Sn2E2] (E = Se, S)." Zeitschrift für Naturforschung B 52, no. 5 (1997): 635–38. http://dx.doi.org/10.1515/znb-1997-0515.

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Abstract [{Cp(Ph3P)Ni}SnCl3] reacts with Se(SiMe3)2 within several days to give [{Cp4(Ph3P)3Ni5Sn6Se9] (1). If the reaction is stopped after 16h, green crystals of the intermediate [{Cp(Ph3P)Ni}2Cl2Sn2Se2] (2) can be isolated. According to the X -ray structure determination, 2 consists of a planar Sn2Se2 ring with terminal {Cp(Ph3P)Ni} and Cl substituents in a trans arrangement. The analogous reaction of [{Cp(Ph3P)Ni}SnCl3] with S(SiMe3)2 leads to the sulfur derivative [{Cp(Ph3P)Ni}2Cl2Sn2S2] 3 which has an analogous structure.

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25

Moyce, Elizabeth B. A., Antoni E. Milodowski, Katherine Morris, and Samuel Shaw. "Herbert's Quarry, South Wales – an analogue for host-rock alteration at a cementitious radioactive waste repository?" Mineralogical Magazine 79, no. 6 (2015): 1407–18. http://dx.doi.org/10.1180/minmag.2015.079.6.16.

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AbstractCement in radioactive waste repositories will produce leachates of pH > 10 which may alter the host rock, affecting its ability to act as a barrier to radionuclide migration. To complement the many laboratory and modelling studies of rock alteration in cement leachates, analogue sites have been investigated to understand reactions at time scales relevant to geodisposal. However, analogue site histories may be poorly constrained and these systems may be influenced by site specific factors. Therefore increasing the number of sites studied is important to minimize uncertainty in the ap

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26

Regitz, Manfred, Klaus Urgast, and Gerhard Maas. "Phosphorverbindungen ungewöhnlicher Koordination, 3 [1] Vergleich des Cycloadditonsverhaltens von Diphenylketen und Triphenylphosphen / Phosphorus Compounds with Unusual Coordination, 3 [1] Comparison of the Cycloaddition Behaviour of Diphenylketene and Triphenylphosphene." Zeitschrift für Naturforschung B 40, no. 1 (1985): 67–76. http://dx.doi.org/10.1515/znb-1985-0115.

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Triphenylphosphene (3b), generated thermally or photochemically from 1b, undergoes olefination reaction with 4.5-benzotropone (6) to yield 1-(diphenylmethylen)-4.5-benzocycloheptatriene (9); the oxaphosphetane 7b is assumed to be the intermediate of this reaction. In an analogous way, 4-pyrone (15) is transformed into 4-(diphenylmethylen)pyrane (16). Corresponding olefination behaviour is observed in the reactions of 6 and 15 with diphenylketene.In the reaction of tetracyclone (20) with diphenylketene (3a), the olefination sequence leads to the formation of (diphenylmethylen)tetraphenylcyclope

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27

Salmeia, Khalifah A., Akef T. Afaneh, Reem R. Habash, and Antonia Neels. "Trivinylphosphine Oxide: Synthesis, Characterization, and Polymerization Reactivity Investigated Using Single-Crystal Analysis and Density Functional Theory." Molecules 28, no. 16 (2023): 6097. http://dx.doi.org/10.3390/molecules28166097.

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Organophosphorus chemicals are versatile and important in industry. Trivinylphosphine oxide (TVPO), for example, exhibited a promising precursor as a flame-retardant additive for industrial applications. Density functional theory (DFT) simulations were used to explore the kinetic and thermodynamic chemical processes underlying the nucleophilic addition reactions of TVPO in order to better understand their polymerization mechanisms. An experimental X-ray single-crystal study of TVPO supported this work’s theory based on its computed findings. TVPO was prepared using POCl3 and VMB in a temperatu

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28

Mojtahedi, Mohammad M., Masoomeh Mehraban, Kiana Darvishi, and M. Saeed Abaee. "Ultrasound mediated synthesis of dihydropyrano[3,2-d][1,3]dioxin-7-carbonitrile derivatives in H2O/EtOH medium." Heterocyclic Communications 23, no. 2 (2017): 91–95. http://dx.doi.org/10.1515/hc-2017-0014.

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AbstractA one-pot cyclocondensation of 1,3-dioxane-5-one (1) with malononitrile and aromatic aldehydes in aqueous sodium hydroxide under ultrasonic irradiation furnishes a series of pyrano[3,2-d][1,3]dioxin derivatives 3. Reactions are completed after a few minutes and the precipitated products are purified by simple crystallization from ethanol. The reaction with ethyl cyanoacetate instead of malononitrile gives the respective analogous products in high yields.

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29

Inokuma, Yasuhide. "Calix[3]Pyrrole and Related Macrocycles: Synthesis and Properties." ECS Meeting Abstracts MA2023-01, no. 15 (2023): 1409. http://dx.doi.org/10.1149/ma2023-01151409mtgabs.

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Calix[4]pyrrole is a porphyrinogen-like macrocycle in which four pyrrole units are linked by four sp3-hybridized carbon atoms at the α-positions. While such tetrapyrrolic macrocycles are readily synthesized by acid-catalyzed condensation reactions of pyrrole monomer and carbonyl compound, analogous macrocycles composed of three pyrrole units are always not observed. Calix[3]pyrrole is a ring-contracted analogue of calix[4]pyrrole, and has been missing in porphyrin-related chemistry. In this presentation, the first synthesis of calix[3]pyrrole and its furan-embedded analogues is reported, and t

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30

Schwarz, Marián, and Josef Kuthan. "Reaction of organolithium compounds with 1-substituted 2,4,6-triphenylpyridinium perchlorates." Collection of Czechoslovak Chemical Communications 54, no. 7 (1989): 1880–87. http://dx.doi.org/10.1135/cccc19891880.

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The reaction of organolithium compounds with 1-substituted 2,4,6-triphenylpyridinium perchlorates Ia-Ic produces mixtures of 1,4-dihydropyridines IIa-IIe and 1,2-dihydropyridines IIIa-IIIe. Analogous reactions of phenylmagnesium bromide with compounds Ia-Ic proceed with very low conversions (less than 1%). Photochromism in visible range is observed only with the compounds II which have two aromatic substituents at 4-position, whereas compounds III and IId show no visible photochromism. The molecular spectra of the compounds newly prepared are discussed.

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31

Li, Fang, W. Felix Zhu, Claire Empel, et al. "Photosensitization enables Pauson-Khand–type reactions with nitrenes." Science 383, no. 6682 (2024): 498–503. http://dx.doi.org/10.1126/science.adm8095.

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The Pauson-Khand reaction has in the past 50 years become one of the most common cycloaddition reactions in chemistry. Coupling two unsaturated bonds with carbon monoxide, the transformation remains limited to CO as a C 1 building block. Herein we report analogous cycloaddition reactions with nitrenes as an N 1 unit. The reaction of a nonconjugated diene with a nitrene precursor produces bicyclic bioisosteres of common saturated heterocycles such as piperidine, morpholine, and piperazine. Experimental and computational mechanistic studies support relaying of the diradical nature of triplet nit

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32

Kozioł, Andrzej, Stanisław Pasynkiewicz, Antoni Pietrzykowski, and Lucjan B. Jerzykiewicz. "trans-Bis[1,3-bis(2,4,6-trimethylphenyl)imidazolidin-2-ylidene]dichloronickel(II): Synthesis and Structure." Collection of Czechoslovak Chemical Communications 72, no. 5-6 (2007): 609–17. http://dx.doi.org/10.1135/cccc20070609.

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trans-Bis[1,3-bis(2,4,6-trimethylphenyl)imidazolidin-2-ylidene]dichloronickel(II), [NiCl2(SIMes)2], was synthesized in a one-pot reaction of fluorenyllithium with nickel(II) bromide followed by the addition of 1,3-bis(2,4,6-trimethylphenyl)imidazolidinium chloride. Labile difluorenyl- nickel, formed in the course of the reaction, behaves differently than nickelocene and indenocene in analogous reactions. It exchanges both fluorenyl ligands giving the title compound. The crystal and molecular structure of this compound have been determined by single-crystal X-ray diffraction. The compound cryst

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33

Beattie, JK, MB Celap, MT Kelso, and SM Nesic. "Eigenanalysis of the Coupled First-Order Isomerization Reactions of the Bis[(S)-alaninato]dinitrocobaltate(III) Ion." Australian Journal of Chemistry 42, no. 10 (1989): 1647. http://dx.doi.org/10.1071/ch9891647.

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Three of the five possible geometric isomers of the bis[(S)-alaninato] dinitrocobaltate (III) ion isomerize to the stable fourth isomer by a series of first-order reactions. The fifth isomer is not observed. The kinetics of the isomerizations in neutral, aqueous solutions between 65 and 95 C have been studied by chromatographic separation of the isomers. The data were fitted by eigenanalysis of the coupled first-order differential equations. The results are consistent with a reaction scheme requiring five rate constants, kxy, where xy represents isomerization from isomer x to isomer y. lsomer

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34

Caputo, Daniela, Michele Casiello, Antonella Milella, et al. "Deep Control of Linear Oligomerization of Glycerol Using Lanthanum Catalyst on Mesoporous Silica Gel." Catalysts 10, no. 10 (2020): 1170. http://dx.doi.org/10.3390/catal10101170.

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The valorization of glycerol (1), a waste of biodiesel production of Fatty Acid Methyl Esters (FAMEs), adopting a “green” approach, represents an important goal of sustainable chemistry. While the polymerization of 1 to hyperbranched oligomers is a well-established process, the linear analogues are difficult to obtain. In this context, we explore the reaction without the solvent of heterogeneous hybrid La(III)O-KIT-6 catalyst (2), which is based on lanthanum oxide on mesoporous silica gel, showing a superior linear selectivity compared to most of the analogous catalysts recently reported.

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35

MacKenzie, Douglas A., and John Paul Pezacki. "Kinetics studies of rapid strain-promoted [3+2] cycloadditions of nitrones with bicyclo[6.1.0]nonyne." Canadian Journal of Chemistry 92, no. 4 (2014): 337–40. http://dx.doi.org/10.1139/cjc-2013-0577.

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Strain-promoted alkyne−nitrone cycloaddition (SPANC) reactions represent a bioorthogonal labeling strategy that is both very rapid and at the same time efficient and selective. Nitrones provide increased reaction rates as well as greater susceptibility toward stereoelectronic modification when compared with organic azides. We find that strain-promoted cycloadditions of cyclic nitrones with bicyclo[6.1.0]nonyne react with second-order rate constants as large as 1.49 L mol−1 s−1 at 25 °C. These reactions display rate constants that are up to 37-fold greater than those of the analogous reactions

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36

Mustika, Chessy Rima, Endang Astuti, and Muhammad Idham Darussalam Marjan. "Molecular Docking, Synthesis and <i>In Vitro</i> Antiplasmodium Assay of Monoketone Curcumin Analogous from 2-Chlorobenzaldehyde." Indonesian Journal of Chemistry 24, no. 3 (2024): 638. http://dx.doi.org/10.22146/ijc.81122.

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This research aimed to develop new curcumin analogous as antiplasmodium candidates. Six curcumin analogous (1-6) were proposed and docked against three Plasmodium falciparum receptors, namely PfENR, PfLDH, and PfATP6. The docking studies were carried out to predict the interaction among the compounds and receptors as well as their binding affinity. Three curcumin analogous (3, 4, and 6), which displayed specific interactions with the target receptors and possessed the lowest binding affinity were further proceeded to synthesis and in vitro antiplasmodium assay. Synthesis of the analogous 3, 4,

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37

Kidonakis, Marios, Michael Fragkiadakis та Manolis Stratakis. "β-Borylation of conjugated carbonyl compounds with silylborane or bis(pinacolato)diboron catalyzed by Au nanoparticles". Organic & Biomolecular Chemistry 18, № 43 (2020): 8921–27. http://dx.doi.org/10.1039/d0ob01806f.

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β-Borylation occurs in the Au/TiO<sub>2</sub>-catalysed reaction between the silylborane Me<sub>2</sub>PhSiBpin and conjugated carbonyl compounds, in contrast to the so far known analogous reaction catalysed by other metals, where β-silylation occurs instead.

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Birnholtz, Ofek, Shahar Hadar, and Barak Kol. "Radiation reaction at the level of the action." International Journal of Modern Physics A 29, no. 24 (2014): 1450132. http://dx.doi.org/10.1142/s0217751x14501322.

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The aim of this paper is to highlight a recently proposed method for the treatment of classical radiative effects, in particular radiation reaction, via effective field theory methods. We emphasize important features of the method and in particular the doubling of fields. We apply the method to two simple systems: a mass–rope system and an electromagnetic charge-field system. For the mass–rope system in 1 + 1 dimensions we derive a double-field effective action for the mass which describes a damped harmonic oscillator. For the EM charge-field system, i.e. the system of an accelerating electric

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Lébl, Tomáš, Jaroslav Holeček, Marek Dymák, and Dirk Steinborn. "Reinvestigation of Reaction of (2-Ethoxyvinyl)stannanes with Acetyl Bromide." Collection of Czechoslovak Chemical Communications 67, no. 5 (2002): 587–95. http://dx.doi.org/10.1135/cccc20020587.

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Four analogous (2-ethoxyvinyl)stannanes (E/Z)-Bu3SnC(R)=CHOEt (R = Bu, H) were prepared and characterised using 1H, 13C, 119Sn, 1H-13C HMQC, 1H-13C HMBC, and 1H-119Sn HMQC NMR spectroscopy. The course of their reactions with acetyl bromide was studied by NMR spectroscopy. Although tributyltin bromide, ethyl acetate and the coresponding alkyne were identified as reaction products, this present reinvestigation showed unambiguously that heterolytic fragementation reactions, as stated previously, did not take place. Acetyl bromide cleaves the Sn-C= bond yielding tributyltin bromide and vinyl ether

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40

Hardin, Simon, and Terence W. Turney. "Cobalt-catalysed reactions of methoxysilanes with CO/HSiEt3: a reaction analogous to methanol homologation." Journal of Molecular Catalysis 39, no. 2 (1987): 237–41. http://dx.doi.org/10.1016/0304-5102(87)80068-8.

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41

Gao, Buhong, Yu Sun, Yingchun Miao, Li Xu, and Zhongxia Wang. "Fluorometric detection of pH and quercetin based on nitrogen and phosphorus co-doped highly luminescent graphene-analogous flakes." Analyst 145, no. 1 (2020): 115–21. http://dx.doi.org/10.1039/c9an02077b.

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Uhlig, Wolfram. "Zur gezielten Synthese funktionell substituierter Oligosilane aus Silyltriflaten und Aminosilyllithiumverbindungen / Tailor-Made Synthesis of Functional Substituted Oligosilanes from Silyl Triflates and (Aminosilyl)Lithium Compounds." Zeitschrift für Naturforschung B 58, no. 1 (2003): 183–90. http://dx.doi.org/10.1515/znb-2003-0128.

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Abstract Diethylamino substituted silyllithium compounds have been prepared in situ from the corresponding phenylchlorosilanes and lithium. These reagents undergo coupling reactions with triflate derivatives of silanes and oligosilanes. Exchange processes analogous to metal halogen exchange and Si-Si bond cleavage, which are side reactions with chlorosilanes, were not observed. Based on the coupling reaction and the amino-to-triflate transformation, functionalized tri-, tetra-, penta- und hexasilanes have been synthesized. α,ω-Triflate substituted oligosilanes containing π-systems have also be

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Protti, Stefano, Daniele Dondi, Maurizio Fagnoni, and Angelo Albini. "Photochemistry in synthesis: Where, when, and why." Pure and Applied Chemistry 79, no. 11 (2007): 1929–38. http://dx.doi.org/10.1351/pac200779111929.

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A series of photochemical reactions are assessed under the environmental aspect by using Eissen and Metzger's EATOS (environmental assessment tool for organic syntheses) method and are compared with strictly analogous thermal processes. These include C-C bond-forming reactions (arylation and alkylation) and selective oxidation and reduction reactions. In most cases, the photochemical method is experimentally simpler and less expensive than the thermal alternative. A disadvantage is that photochemical reactions are carried out in rather dilute solution, and this factor gives by far the main con

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Farag, Paula S., Magdy M. Hemdan та Aya I. Hassaballah. "The Reformatsky analogous reaction for the synthesis of novel β-thioxoesters via using aroyl isothiocyanates under solvent-free ball milling and conventional conditions". RSC Advances 12, № 17 (2022): 10204–8. http://dx.doi.org/10.1039/d2ra01154a.

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45

Dvořák, David, Eva Neugebauerová, František Liška, and Jiří Ludvík. "Electroreductive Additions of Aromatic Dichalcogenides to Fluorinated Ethenes." Collection of Czechoslovak Chemical Communications 63, no. 3 (1998): 378–86. http://dx.doi.org/10.1135/cccc19980378.

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Intermediates and products formed during the electrochemical reduction of diphenyl disulfide (1) add to chlorotrifluoroethene (3) under the formation of 2-chloro-1,1,2-trifluoroethyl phenyl sulfide (5) and the E/Z isomers of 2-chloro-1,2-difluoroethenyl phenyl sulfide (6). The analogous reaction with 1,2-dichlorodifluoroethene (4) led to a mixture of E/Z isomers of 6. Electrochemically reduced diphenyl diselenide (2) reacted with 3 giving rise to 2-chloro-1,1,2-trifluoroethyl phenyl selenide (7) whereas the reaction with 4 does not proceed. Addition of disulfide 1 to 4 gives evidence of the pa

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46

Topanov, P. A., M. V. Dmitriev, S. Yu Balandina, Y. V. Shklyaev, I. V. Mashevskaya, and A. N. Maslivets. "Pseudo-three-component spiro[dihydrofuran-2,3′-oxindoles] synthesis: <i>in situ</i> generation of diazooxindole." Журнал общей химии 93, no. 11 (2023): 1680–89. http://dx.doi.org/10.31857/s0044460x23110057.

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Upon reaction with N -substituted pyrroloquinoxalinetriones, isatin hydrazone is oxidized to diazooxindole and enters into a formal [4+1] cycloaddition reaction with N -substituted pyrroloquinoxalinetriones to form compounds containing a spiro[dihydrofuran-2,3′-oxindole] fragment, which is interesting for medicinal chemistry. The reaction of diazooxindoles with N -unsubstituted pyrroloquinoxalinetriones afforded analogous substituted spiro[dihydrofuran-2,3′-oxindoles]. The resulting compounds have moderate antimicrobial activity.

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47

Varlamov, V. V., A. I. Davydov, I. A. Mostakov, and V. N. Orlin. "PHOTONEUTRON REACTION CROSS SECTIONS FOR 90Zr IN DIFFERENT EXPERIMENTS." Âdernaâ fizika 87, no. 5 (2024): 369–81. https://doi.org/10.31857/s0044002724050029.

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Reliability of the data on partial photoneutron reactions on 90Zr obtained in the experiment carried out on the beam of bremsstrahlung was investigated using the experimental-theoretical method for partial reaction cross section evaluation basing on objective physical criteria. It was found out that (γ, 1𝑛) and (γ, 2𝑛) reaction cross sections obtained using the corrections calculated via statistical theory to the neutron yield cross section σ(γ, 𝑥𝑛) = σ(γ, 1𝑛) + 2σ(γ, 2𝑛) satisfy physical criteria of data reliability. The integrated characteristics of the cross sections of the reactions (γ, 1𝑛

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48

Daniellou, Richard, Hongyan Zheng, and David RJ Palmer. "Kinetics of the reaction catalyzed by inositol dehydrogenase from Bacillus subtilis and inhibition by fluorinated substrate analogs." Canadian Journal of Chemistry 84, no. 4 (2006): 522–27. http://dx.doi.org/10.1139/v06-033.

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Inositol dehydrogenase (EC 1.1.1.18) from Bacillus subtilis catalyzes the oxidation of myo-inositol to scyllo-inosose by transfer of the equatorial hydride of the substrate to NAD+. This is a key enzyme in the metabolism of myo-inositol, a primary carbon source for soil bacteria. In light of our recent discovery that the enzyme has a broad substrate spectrum while maintaining high stereoselectivity, we seek a more thorough understanding of the enzyme and its active site. We have examined the kinetics of the recombinant enzyme, and synthesized fluorinated substrate analogues as competitive inhi

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Bowden, Allen A., and Jim D. Atwood. "Reactions of SO2 with trans-Ir(CO)(Cl)(TPPTS)2 in water." Canadian Journal of Chemistry 79, no. 5-6 (2001): 1036–39. http://dx.doi.org/10.1139/v01-055.

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Reaction of SO2 with trans-Ir(CO)(Cl)(TPPTS)2 in water mirrors the nature of SO2 dissolved in water. At low pH (pH = 1) where SO2 exists as the hydrated species SO2·H2O, only Ir(CO)(Cl)(SO2)(TPPTS)2 forms. At higher pH (pH = 6) where HSO3 dominates, no SO2 complex is observed and a hydride, Ir(CO)(Cl)(H)(OH)(TPPTS)2, is the primary product. A mixture of SO2 and O2 does not lead to an iridium sulfate or show any evidence of the dioxygen adduct upon reaction in water with trans-Ir(CO)(Cl)(TPPTS)2, in contrast to the analogous reaction in organic solvents. In water, only the SO2 complex, Ir(CO)(

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Kurandina, Daria, Padon Chuentragool, and Vladimir Gevorgyan. "Transition-Metal-Catalyzed Alkyl Heck-Type Reactions." Synthesis 51, no. 05 (2019): 985–1005. http://dx.doi.org/10.1055/s-0037-1611659.

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The Heck reaction is one of the most reliable and useful strategies for the construction of C–C bonds in organic synthesis. However, in contrast to the well-established aryl Heck reaction, the analogous reaction employing alkyl electrophiles is much less developed. Significant progress in this area was recently achieved by merging radical-mediated and transition-metal-catalyzed approaches. This review summarizes the advances in alkyl Heck-type reactions from its discovery early in the 1970s up until the end of 2018.1 Introduction2 Pd-Catalyzed Heck-Type Reactions2.1 Benzylic Electrophiles2.2 α

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