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Статті в журналах з теми "Homolyse"

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Автор: Grafiati

Опубліковано: 25 травня 2024

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1

Wismach, Cathleen, Wolf-Walther du Mont, Peter G. Jones, Ludger Ernst, Ulrich Papke, Govindasamy Mugesh, Wolfgang Kaim, Matthias Wanner, and Klaus D. Becker. "Selenol-Nitrosierung undSe-Nitrososelenol-Homolyse: ein Reaktionspfad mit möglichen biochemischen Implikationen." Angewandte Chemie 116, no. 30 (July 26, 2004): 4061–64. http://dx.doi.org/10.1002/ange.200453872.

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2

Abderrazak, Youssef, Aditya Bhattacharyya, and Oliver Reiser. "Durch sichtbares Licht induzierte Homolyse unedler, gut verfügbarer Metallsubstratkomplexe: Eine komplementäre Aktivierungsstrategie in der Photoredoxkatalyse." Angewandte Chemie 133, no. 39 (June 18, 2021): 21268–84. http://dx.doi.org/10.1002/ange.202100270.

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3

Herberg, Clemens, Hans-;Dieter Beckhaus, Tamas Kürtvelyesi, and Christoph Rüchardt. "Thermolabile Kohlenwasserstoffe, 32. Konkurrierende Cope-;Umlagerung und Homolyse vonmeso- undDL-3,4-Di(1-cyclohexen-1-yl)-2,2,5,5-tetramethylhexan." Chemische Berichte 126, no. 1 (January 1993): 117–27. http://dx.doi.org/10.1002/cber.19931260119.

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4

Embo-Ibouanga, Ange W., Michel Nguyen, Lucie Paloque, Mathilde Coustets, Jean-Patrick Joly, Jean-Michel Augereau, Nicolas Vanthuyne, et al. "Hybrid Peptide-Alkoxyamine Drugs: A Strategy for the Development of a New Family of Antiplasmodial Drugs." Molecules 29, no. 6 (March 21, 2024): 1397. http://dx.doi.org/10.3390/molecules29061397.

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Анотація:

The emergence and spread of drug-resistant Plasmodium falciparum parasites shed a serious concern on the worldwide control of malaria, the most important tropical disease in terms of mortality and morbidity. This situation has led us to consider the use of peptide-alkoxyamine derivatives as new antiplasmodial prodrugs that could potentially be efficient in the fight against resistant malaria parasites. Indeed, the peptide tag of the prodrug has been designed to be hydrolysed by parasite digestive proteases to afford highly labile alkoxyamines drugs, which spontaneously and instantaneously homolyse into two free radicals, one of which is expected to be active against P. falciparum. Since the parasite enzymes should trigger the production of the active drug in the parasite’s food vacuoles, our approach is summarized as “to dig its grave with its fork”. However, despite promising sub-micromolar IC50 values in the classical chemosensitivity assay, more in-depth tests evidenced that the anti-parasite activity of these compounds could be due to their cytostatic activity rather than a truly anti-parasitic profile, demonstrating that the antiplasmodial activity cannot be based only on measuring antiproliferative activity. It is therefore imperative to distinguish, with appropriate tests, a genuinely parasiticidal activity from a cytostatic activity.

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5

Andrianasolo, Eric H., Douglas Goeger, and William H. Gerwick. "Mitsoamide: A cytotoxic linear lipopeptide from the Madagascar marine cyanobacterium Geitlerinema sp." Pure and Applied Chemistry 79, no. 4 (January 1, 2007): 593–602. http://dx.doi.org/10.1351/pac200779040593.

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Анотація:

A new cytotoxic and linear peptide (IC50 460 nM to NCI-H460 human lung tumor cells) was isolated from the marine cyanobacterium Geitlerinema sp. The planar structure of mitsoamide was deduced by 1D and 2D NMR experiments in combination with MS analyses. The structure of mitsoamide contains an unusual polyketide unit (3,7-dimethoxy-5-methyl-nonanedioic acid, DMNA), incorporates a homolysine (HomoLys) residue and possesses a highly unusual piperidine aminal moiety. The configurations of the relatively common amino acids present in mitsoamide (Ala, Ile, N-Me-Ile, Phe, Val) were determined by chiral HPLC analysis of the acid hydrolysate.

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6

Nguyen, Thu Anh, Hui Ming Lim, Kenji Kinashi, Wataru Sakai, Naoto Tsutsumi, Satoko Okubayashi, Satoru Hosoda, and Tetsu Sato. "Spin Trapping Analysis of Radical Intermediates on the Thermo-Oxidative Degradation of Polypropylene." Polymers 15, no. 1 (December 30, 2022): 200. http://dx.doi.org/10.3390/polym15010200.

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The purpose of this study is to investigate the thermo-oxidative degradation behavior of polypropylene (PP) by comparing three types of pristine PP granules (consisting of homopolymer, random copolymer, and block copolymer) with their corresponding oxidized analogues. These analogues were intensely oxidized under oxygen at 90 °C for 1000 h by using the electron spin resonance (ESR) spin trapping method that can detect short-lived radical intermediates during the degradation. The degrees of oxidation could be evaluated by chemiluminescence (CL) intensity, which was related to the concentration of hydroperoxide groups generated in the PP chain. In the pristine PP samples, a small amount of hydroperoxides were found to be formed unintentionally, and their homolysis produces alkoxy radicals, RO•, which then undergo β-scission to yield chain-end aldehydes or chain-end ketones. These oxidation products continue to take part in homolysis to produce their respective carbonyl and carbon radicals. On the other hand, in the oxidized PP granules, because of their much higher hydroperoxide concentration, the two-stage cage reaction and the bimolecular decomposition of hydroperoxides are energetically favorable. Carbonyl compounds are formed in both reactions, which are then homolyzed to form the carbonyl radical species, •C(O)–. PP homopolymer produced the largest amount of carbonyl radical spin adduct; thus, it was found that the homopolymer is most sensitive to oxygen attack, and the presence of ethylene units in copolymers enhances the oxidation resistance of PP copolymers.

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7

Albalat, Muriel, Gérard Audran, Maxence Holzritter, Sylvain R. A. Marque, Philippe Mellet, Nicolas Vanthuyne, and Pierre Voisin. "An enzymatic acetal/hemiacetal conversion for the physiological temperature activation of the alkoxyamine C–ON bond homolysis." Organic Chemistry Frontiers 7, no. 19 (2020): 2916–24. http://dx.doi.org/10.1039/d0qo00559b.

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Анотація:

Enzymatic trigger. Upon enzymatic hydrolysis by Subtilisin A, highly stable alkoxyamines are transformed into highly labile alkoxyamines able to homolyze spontaneously in less than 500 seconds, at 37 °C.

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8

Edeleva, Mariya, Gerard Audran, Sylvain Marque, and Elena Bagryanskaya. "Smart Control of Nitroxide-Mediated Polymerization Initiators’ Reactivity by pH, Complexation with Metals, and Chemical Transformations." Materials 12, no. 5 (February 26, 2019): 688. http://dx.doi.org/10.3390/ma12050688.

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Анотація:

Because alkoxyamines are employed in a number of important applications, such as nitroxide-mediated polymerization, radical chemistry, redox chemistry, and catalysis, research into their reactivity is especially important. Typically, the rate of alkoxyamine homolysis is strongly dependent on temperature. Nonetheless, thermal regulation of such reactions is not always optimal. This review describes various ways to reversibly change the rate of C–ON bond homolysis of alkoxyamines at constant temperature. The major methods influencing C–ON bond homolysis without alteration of temperature are protonation of functional groups in an alkoxyamine, formation of metal–alkoxyamine complexes, and chemical transformation of alkoxyamines. Depending on the structure of an alkoxyamine, these approaches can have a significant effect on the homolysis rate constant, by a factor of up to 30, and can shorten the half-lifetime from days to seconds. These methods open new prospects for the application of alkoxyamines in biology and increase the safety of (and control over) the nitroxide-mediated polymerization method.

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9

Peuker, A., W. Hitzl, T. Jäger, B. Maier, and A. Staudach. "Homologe intrauterine Insemination." Gynäkologische Endokrinologie 5, no. 2 (May 2007): 97–101. http://dx.doi.org/10.1007/s10304-007-0184-y.

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10

Decher, H. "Radikalhöhlenverkleinerung durch homologe Knorpelchips*." Laryngo-Rhino-Otologie 64, no. 08 (August 1985): 423–26. http://dx.doi.org/10.1055/s-2007-1008172.

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11

Koppenol, Willem H., and Reinhard Kissner. "Can ONOOH Undergo Homolysis?" Chemical Research in Toxicology 11, no. 2 (February 1998): 87–90. http://dx.doi.org/10.1021/tx970200x.

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12

Turrà, Natascia, Ulrich Neuenschwander, and Ive Hermans. "Molecule-Induced Peroxide Homolysis." ChemPhysChem 14, no. 8 (April 4, 2013): 1666–69. http://dx.doi.org/10.1002/cphc.201300130.

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13

Guselnikova, Olga, Gérard Audran, Jean-Patrick Joly, Andrii Trelin, Evgeny V. Tretyakov, Vaclav Svorcik, Oleksiy Lyutakov, Sylvain R. A. Marque, and Pavel Postnikov. "Establishing plasmon contribution to chemical reactions: alkoxyamines as a thermal probe." Chemical Science 12, no. 11 (2021): 4154–61. http://dx.doi.org/10.1039/d0sc06470j.

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14

Edeleva, Mariya, Denis Morozov, Dmitriy Parkhomenko, Yulia Polienko, Anna Iurchenkova, Igor Kirilyuk, and Elena Bagryanskaya. "Versatile approach to activation of alkoxyamine homolysis by 1,3-dipolar cycloaddition for efficient and safe nitroxide mediated polymerization." Chemical Communications 55, no. 2 (2019): 190–93. http://dx.doi.org/10.1039/c8cc08541b.

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15

Chang, Mu-Chieh, Kate A. Jesse, Alexander S. Filatov, and John S. Anderson. "Reversible homolytic activation of water via metal–ligand cooperativity in a T-shaped Ni(ii) complex." Chemical Science 10, no. 5 (2019): 1360–67. http://dx.doi.org/10.1039/c8sc03719a.

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16

HUHTA, Marja S., Hao-Ping CHEN, Craig HEMANN, C. Russ HILLE, and E. Neil G. MARSH. "Protein–coenzyme interactions in adenosylcobalamin-dependent glutamate mutase." Biochemical Journal 355, no. 1 (February 26, 2001): 131–37. http://dx.doi.org/10.1042/bj3550131.

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Анотація:

Glutamate mutase catalyses an unusual isomerization involving free-radical intermediates that are generated by homolysis of the cobalt–carbon bond of the coenzyme adenosylcobalamin (coenzyme B12). A variety of techniques have been used to examine the interaction between the protein and adenosylcobalamin, and between the protein and the products of coenzyme homolysis, cob(II)alamin and 5′-deoxyadenosine. These include equilibrium gel filtration, isothermal titration calorimetry, and resonance Raman, UV-visible and EPR spectroscopies. The thermodynamics of adenosylcobalamin binding to the protein have been examined and appear to be entirely entropy-driven, with ∆S = 109 Jċmol-1ċK-1. The cobalt–carbon bond stretching frequency is unchanged upon coenzyme binding to the protein, arguing against a ground-state destabilization of the cobalt–carbon bond of adenosylcobalamin by the protein. However, reconstitution of the enzyme with cob(II)alamin and 5′-deoxyadenosine, the two stable intermediates formed subsequent to homolysis, results in the blue-shifting of two of the bands comprising the UV-visible spectrum of the corrin ring. The most plausible interpretation of this result is that an interaction between the protein, 5′-deoxyadenosine and cob(II)alamin introduces a distortion into the ring corrin that perturbs its electronic properties.

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17

Sunada, Yusuke, Shintaro Ishida, Fumiya Hirakawa, Yoshihito Shiota, Kazunari Yoshizawa, Shinji Kanegawa, Osamu Sato, Hideo Nagashima та Takeaki Iwamoto. "Persistent four-coordinate iron-centered radical stabilized by π-donation". Chemical Science 7, № 1 (2016): 191–98. http://dx.doi.org/10.1039/c5sc02601f.

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18

Antić, Aleksandar, and Nemanja Tomić. "Geoheritage and geotourism potential of the Homolje area (eastern Serbia)." Acta Geoturistica 8, no. 2 (December 20, 2017): 67–78. http://dx.doi.org/10.1515/agta-2017-0007.

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Анотація:

AbstractThe region of Homolje in Eastern Serbia represents an area rich with numerous geological and geomorphological features, especially karst formations which are excellent representatives of this area’s geodiversity. However, the geotourism potential of these geosites still remains fully unrevealed. In this paper we analyzed the most representative ones based mainly on their aesthetic value as well as their geotourism potential. The aim of this paper is to emphasize the geotourism potential of Homolje and to determine its strengths, weaknesses, opportunities and threats as well as interactions between them when it comes to tourism development. The results of the SWOT and TOWS analysis indicate that Homolje as a tourist destination possesses immense geotourism potential but is still in the exploration phase according to the Butler tourist cycle of destination evolution. Research results also identify four different strategies which can be applied as solutions for current problems and for further tourism development.

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19

Zhang, Sheng Jian, and Ying Xian Zhao. "Kinetics and Selectivity of Cyclohexane Pyrolysis." Advanced Materials Research 455-456 (January 2012): 540–48. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.540.

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Pyrolysis of cyclohexane was conducted with a plug-flow tube reactor at 873 K. The data of feed conversion fit first-order kinetics adequately, giving the apparent rate constant of 0.0092 s-1 . A chain mechanism of free radical reactions is proposed to interpret consumption of cyclohexane by four processes: homolysis of C-C bond (Path I) and homolysis of C-H bond (Path II ) in reaction chain initiation, H-abstraction of various radicals from feed molecule in reaction chain propagation (Path III ), and the process associated with coke formation (Path IV). The reaction path probability ratio of X I：X II：X III ：X IV was 0.5420: 0.0045 : 0.3897 : 0.0638.

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20

Cherkasov, Sergey, Dmitriy Parkhomenko, Alexander Genaev, Georgii Salnikov, Mariya Edeleva, Denis Morozov, Tatyana Rybalova, Igor Kirilyuk, Sylvain R. A. Marque, and Elena Bagryanskaya. "NMR and EPR Study of Homolysis of Diastereomeric Alkoxyamines." Molecules 25, no. 21 (November 1, 2020): 5080. http://dx.doi.org/10.3390/molecules25215080.

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Three alkoxyamines based on imidazoline radicals with a pyridine functional group—potential initiators of nitroxide-mediated, controlled radical polymerization—were synthesized. Electron Paramagnetic Resonance (EPR) measurements reveal biexponential kinetics for the thermolysis for diastereomeric alkoxyamines and monoexponential kinetics for an achiral alkoxyamine. For comparison, the thermolysis of all three alkoxyamines was studied by NMR in the presence of three different scavengers, namely tetramethylpiperidine-N-oxyl (TEMPO), thiophenol (PhSH), and β-mercaptoethanol (BME), and detailed analysis of products was performed. NMR differentiates between N-inversion, epimerization, and homolysis reactions. The choice of scavenger is crucial for making a reliable and accurate estimate of the true homolysis rate constant.

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21

Zhang, Ze Ping, Yan Lu, Min Zhi Rong, and Ming Qiu Zhang. "A thermally remendable and reprocessable crosslinked methyl methacrylate polymer based on oxygen insensitive dynamic reversible C–ON bonds." RSC Advances 6, no. 8 (2016): 6350–57. http://dx.doi.org/10.1039/c5ra22275c.

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22

Zhao, Bo, Ju-You Lu, Yang Li, Dong-Huai Tu, Zhao-Tie Liu, Zhong-Wen Liu, and Jian Lu. "Regioisomerized atom transfer radical addition (ATRA) of olefins with dichlorofluorocarbons." RSC Advances 5, no. 123 (2015): 101412–15. http://dx.doi.org/10.1039/c5ra19244g.

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23

Cameron, Dale R., Alison M. P. Borrajo, Gregory R. J. Thatcher, and Brian M. Bennett. "Organic nitrates, thionitrates, peroxynitrites, and nitric oxide: a molecular orbital study of the (X = O, S) rearrangement, a reaction of potential biological significance." Canadian Journal of Chemistry 73, no. 10 (October 1, 1995): 1627–38. http://dx.doi.org/10.1139/v95-202.

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Анотація:

The rearrangement of organic thionitrate to sulfenyl nitrite potentially mediates the release of nitric oxide from organic nitrates, such as nitroglycerin, in the presence of thiol. The biological activity of these nitrovasodilators is proposed to result from release of nitric oxide in vivo. The thionitrate rearrangement bears analogy to the rearrangement of peroxynitrous acid to nitric acid, which has been proposed to mediate the biological toxicity of nitric oxide and superoxide. In this paper, the two concerted rearrangement processes and competing homolytic reactions are explored using molecular orbital calculations at levels up to MP4SDQ/6-31G*//MP2/6-31G*. Examination of structure and energy for all conformers and isomers of RSONO2 (R = H, Me), models for organic thionitrates and their isomers, demonstrates that structures corresponding to thionitrates and sulfenyl nitrates are of similar energy. Free energies of reaction for homolysis of these compounds are low (ΔG0 < 19 kcal/mol), whereas the barrier for concerted rearrangement is large (ΔG≠(aq.) = 56 kcal/mol). The larger barrier for concerted rearrangement of peroxynitrous acid to nitric acid (ΔG≠(aq.) = 60 kcal/mol) again compares unfavourably with homolysis (ΔG0 < 11 kcal/mol for homolysis to NO2 or •NO). The transition state structures, confirmed by normal mode and intrinsic reaction coordinate analysis, indicate that considerable structural reorganization is required for concerted rearrangement of the ground state species. These results suggest that concerted rearrangement is not likely to be a viable step in either biological process. However, rearrangement via homolysis and radical recombination may provide an energetically accessible pathway for peroxynitrous acid rearrangement to nitric acid and rearrangement of thionitrate to sulfenyl nitrite. In this case, NO2 will be a primary product of both reactions. Keywords: thionitrate, nitric oxide, peroxynitrite, nitrovasodilator, nitrate.

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24

Audran, Gérard, Raphael Bikanga, Paul Brémond, Mariya Edeleva, Jean-Patrick Joly, Sylvain R. A. Marque, Paulin Nkolo, and Valérie Roubaud. "How intramolecular hydrogen bonding (IHB) controls the C–ON bond homolysis in alkoxyamines." Organic & Biomolecular Chemistry 15, no. 39 (2017): 8425–39. http://dx.doi.org/10.1039/c7ob02223a.

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25

Li, Hong Zhi, Lin Li, Zi Yan Zhong, Yi Han, LiHong Hu, and Ying Hua Lu. "An Accurate and Efficient Method to Predict Y-NO Bond Homolysis Bond Dissociation Energies." Mathematical Problems in Engineering 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/860357.

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Анотація:

The paper suggests a new method that combines the Kennard and Stone algorithm (Kenstone, KS), hierarchical clustering (HC), and ant colony optimization (ACO)-based extreme learning machine (ELM) (KS-HC/ACO-ELM) with the density functional theory (DFT) B3LYP/6-31G(d) method to improve the accuracy of DFT calculations for the Y-NO homolysis bond dissociation energies (BDE). In this method, Kenstone divides the whole data set into two parts, the training set and the test set; HC and ACO are used to perform the cluster analysis on molecular descriptors; correlation analysis is applied for selecting the most correlated molecular descriptors in the classes, and ELM is the nonlinear model for establishing the relationship between DFT calculations and homolysis BDE experimental values. The results show that the standard deviation of homolysis BDE in the molecular test set is reduced from 4.03 kcal mol−1calculated by the DFT B3LYP/6-31G(d) method to 0.30, 0.28, 0.29, and 0.32 kcal mol−1by the KS-ELM, KS-HC-ELM, and KS-ACO-ELM methods and the artificial neural network (ANN) combined with KS-HC, respectively. This method predicts accurate values with much higher efficiency when compared to the larger basis set DFT calculation and may also achieve similarly accurate calculation results for larger molecules.

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26

Zhang, Chen, Junxia Pi, Shu Chen, Ping Liu, and Peipei Sun. "Construction of a 4H-pyrido[4,3,2-gh]phenanthridin-5(6H)-one skeleton via a catalyst-free radical cascade addition/cyclization using azo compounds as radical sources." Organic Chemistry Frontiers 5, no. 5 (2018): 793–96. http://dx.doi.org/10.1039/c7qo00926g.

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Анотація:

The new radical addition/cyano insertion/homolytic aromatic substitution cascade reaction initiated by the thermal homolysis of azo compounds under catalyst-free conditions produced polycyclic phenanthridine derivatives.

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27

Zheng, Yue, Qian-Xiong Zhou, Yang-Yang Zhang, Chao Li, Yuan-Jun Hou, and Xue-Song Wang. "Substituent effect and wavelength dependence of the photoinduced Ru–O homolysis in the [Ru(bpy)2(py-SO3)]+-type complexes." Dalton Transactions 45, no. 7 (2016): 2897–905. http://dx.doi.org/10.1039/c5dt03694a.

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28

Riemer, R., K. F. Bürrig, K. P. Schulitz, and H. Clahsen. "Der homologe Kreuzbandersatz im Tierexperiment." Sportverletzung · Sportschaden 2, no. 02 (June 1988): 72–79. http://dx.doi.org/10.1055/s-2007-993670.

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29

Mezger, Fritz, Gerhard Simchen, and Peter Fischer. "Die homologe "Silyl-Stobbe-Reaktion"." Synthesis 1991, no. 05 (1991): 375–78. http://dx.doi.org/10.1055/s-1991-26469.

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30

Steffan, Carl R., James H. Espenson, and Andreja Bakac. "Oxidative homolysis of organochromium macrocycles." Inorganic Chemistry 30, no. 5 (March 1991): 1134–37. http://dx.doi.org/10.1021/ic00005a046.

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31

Bronz, L., C. Y. Genton, J. Kunz, and W. E. Schreiner. "Reine homologe Uterussarkome 1960–1983." Archives of Gynecology 238, no. 1-4 (September 1985): 671–72. http://dx.doi.org/10.1007/bf02430163.

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32

Prietl, G., G. Haidl, and D. Krebs. "Sterilitätsbehandlung durch homologe intrauterine Insemination." Reproduktionsmedizin 16, no. 6 (December 14, 2000): 376–83. http://dx.doi.org/10.1007/s004440000226.

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33

Li, Jun, Yang Yang, Ping Zhang, James R. Sounik, and Malcolm E. Kenney. "Synthesis, properties and drug potential of the photosensitive alkyl- and alkylsiloxy-ligated silicon phthalocyanine Pc 227." Photochem. Photobiol. Sci. 13, no. 12 (2014): 1690–98. http://dx.doi.org/10.1039/c4pp00321g.

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34

Gong, Xianyun, Hongjun Kang, Yuyan Liu, and Songquan Wu. "Decomposition mechanisms and kinetics of amine/anhydride-cured DGEBA epoxy resin in near-critical water." RSC Advances 5, no. 50 (2015): 40269–82. http://dx.doi.org/10.1039/c5ra03828f.

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35

Audran, Gerard, Matisse Batsiandzy Ibanou, Paul Brémond, Jean-Patrick Joly, and Sylvain R. A. Marque. "Part 10: chemically triggered alkoxyamine C–ON bond homolysis in ionic liquid solvents." RSC Advances 5, no. 93 (2015): 76660–65. http://dx.doi.org/10.1039/c5ra13899j.

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36

Koirala, Agni Raj, Son Docao, and Kyung Byung Yoon. "Photocatalytic homolysis of methyl formate to dry formaldehyde on PdO/TiO2: photocatalytic reverse Tishchenko reaction of methyl formate." RSC Adv. 4, no. 63 (2014): 33144–48. http://dx.doi.org/10.1039/c4ra05744a.

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37

Nkolo, Paulin, Gérard Audran, Raphael Bikanga, Paul Brémond, Sylvain R. A. Marque, and Valérie Roubaud. "C–ON bond homolysis of alkoxyamines: when too high polarity is detrimental." Organic & Biomolecular Chemistry 15, no. 29 (2017): 6167–76. http://dx.doi.org/10.1039/c7ob01312d.

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Анотація:

In this article, previous multi-parameter linear relationships are amended using a parabolic model to describe the effect of EWGs in the alkyl fragment of alkoxyamines on the homolysis rate constant k_d.

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38

Nesterova, Oksana V., Maxim L. Kuznetsov, Armando J. L. Pombeiro, Georgiy B. Shul'pin, and Dmytro S. Nesterov. "Homogeneous oxidation of C–H bonds with m-CPBA catalysed by a Co/Fe system: mechanistic insights from the point of view of the oxidant." Catalysis Science & Technology 12, no. 1 (2022): 282–99. http://dx.doi.org/10.1039/d1cy01991k.

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Анотація:

A Co/Fe system efficiently catalyses the oxidation of C–H bonds with m-CPBA. The nitric acid promoter hampers the m-CPBA homolysis, suppressing the free radical activity. Experimental and computational data evidence a concerted oxidation mechanism.

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39

Shin, Jeongcheol, Jiseon Lee, Jong-Min Suh, and Kiyoung Park. "Ligand-field transition-induced C–S bond formation from nickelacycles." Chemical Science 12, no. 48 (2021): 15908–15. http://dx.doi.org/10.1039/d1sc05113j.

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Анотація:

d–d excitations can accelerate C–S reductive eliminations of nickelacycles via intersystem crossing to a repulsive 3(C-to-Ni charge transfer) state inducing Ni–C bond homolysis. This homolytic photoreactivity is common for organonickel(ii) complexes.

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40

Audran, Gérard, Lionel Bosco, Paul Brémond, Natacha Jugniot, Sylvain R. A. Marque, Philippe Massot, Philippe Mellet, et al. "Enzymatic triggering of C–ON bond homolysis of alkoxyamines." Organic Chemistry Frontiers 6, no. 21 (2019): 3663–72. http://dx.doi.org/10.1039/c9qo00899c.

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Анотація:

Alkoxyamine 1 is selectively hydrolyzed by chymotrypsin and substilisin A into alkoxyamine 2H+ for which C–ON bond homolysis occurred with a 4-fold increase in rate constants compared to 1 while non-specific proteases had no effect.

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41

Audran, Gérard, Elena Bagryanskaya, Irina Bagryanskaya, Mariya Edeleva, Jean-Patrick Joly, Sylvain R. A. Marque, Anna Iurchenkova, et al. "How intramolecular coordination bonding (ICB) controls the homolysis of the C–ON bond in alkoxyamines." RSC Advances 9, no. 44 (2019): 25776–89. http://dx.doi.org/10.1039/c9ra05334d.

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Анотація:

Because the C–ON bond homolysis rate constant k_d is an essential parameter of alkoxyamine reactivity, it is especially important to tune k_d without a major alteration of the structure of the molecule.

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42

Torti, Edoardo, Gioia Della Giustina, Stefano Protti, Daniele Merli, Giovanna Brusatin, and Maurizio Fagnoni. "Aryl tosylates as non-ionic photoacid generators (PAGs): photochemistry and applications in cationic photopolymerizations." RSC Advances 5, no. 42 (2015): 33239–48. http://dx.doi.org/10.1039/c5ra03522h.

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Анотація:

Irradiation of aryl tosylates leads to homolysis of the ArO–S bond and PTSA or p-toluenesulfinic acid was released. The aryl sulfonates tested were then used as non-ionic photoacid generators (PAGs) in hybrid organic/inorganic sol–gel photoresists.

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43

Audran, Gérard, Elena Bagryanskaya, Irina Bagryanskaya, Paul Brémond, Mariya Edeleva, Sylvain R. A. Marque, Dmitriy Parkhomenko, Evgeny Tretyakov, and Svetlana Zhivetyeva. "C–ON bond homolysis of alkoxyamines triggered by paramagnetic copper(ii) salts." Inorganic Chemistry Frontiers 3, no. 11 (2016): 1464–72. http://dx.doi.org/10.1039/c6qi00277c.

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Pyridine-based alkoxyamines were used as ligands for Cu(hfac)₂ to prepare the first metallic complexes of alkoxyamines. Structures of complexes were determined by X-ray analysis and a 21-fold increase in the C–ON bond homolysis was observed.

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44

Schmale, Ine. "Ovarialkarzinom." Onkologische Welt 13, no. 05 (December 2022): 292. http://dx.doi.org/10.1055/a-1939-6339.

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Анотація:

Die Phase-III-Studie ATHENA untersucht in 4 Studienarmen eine optimale Erstlinien-Erhaltungstherapie mit Rucaparib (Rubraca®). Die beim ASCO 2022 präsentierten Ergebnisse der ATHENA-MONO-Arme bestätigen eine Verlängerung des progressionsfreien Überlebens (PFS) mit Rucaparib unabhängig vom HRD-Status (homologe Rekombinations-Defizienz).

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45

Goertzen, M., A. Dellmann, J. Gruber, H. Clahsen, and K. Bürrig. "Die homologe Kreuzbandtransplantation als intraartikulärer Bandersatz." Zeitschrift für Orthopädie und ihre Grenzgebiete 131, no. 02 (March 18, 2008): 179–86. http://dx.doi.org/10.1055/s-2008-1040226.

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46

Fokin, Andrey A., Boryslav A. Tkachenko, Oleg I. Korshunov, Pavel A. Gunchenko, and Peter R. Schreiner. "Molecule-Induced Alkane Homolysis with Dioxiranes." Journal of the American Chemical Society 123, no. 45 (November 2001): 11248–52. http://dx.doi.org/10.1021/ja0158096.

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47

Sturzbecher-Höhne, Manuel, Thomas Nauser, Reinhard Kissner, and Willem H. Koppenol. "Photon-Initiated Homolysis of Peroxynitrous Acid." Inorganic Chemistry 48, no. 15 (August 3, 2009): 7307–12. http://dx.doi.org/10.1021/ic900614e.

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48

Kreher, Richard P., Heidi Zimmermann, and Christoph Sellinghoff. "Homologe Alkansäuren: Schmelzpunktalternanz Regelmäßigkeit oder Zufälligkeit?" CHEMKON 7, no. 4 (2000): 174–79. http://dx.doi.org/10.1002/ckon.20000070403.

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49

Gaudel-Siri, Anouk, Didier Siri, and Paul Tordo. "Homolysis ofN-alkoxyamines: A Computational Study." ChemPhysChem 7, no. 2 (February 6, 2006): 430–38. http://dx.doi.org/10.1002/cphc.200500308.

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50

Song, Wenjing, and Andreja Bakac. "Oxidative Homolysis of a Nitrosylchromium Complex." Chemistry - A European Journal 14, no. 16 (May 29, 2008): 4906–12. http://dx.doi.org/10.1002/chem.200701750.

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