Bibliografías temáticas / Diphenylphosphinyl radicals

Literatura académica sobre el tema "Diphenylphosphinyl radicals"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 20 de febrero de 2023

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Artículos de revistas sobre el tema "Diphenylphosphinyl radicals"

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Foray, Gabriela S., Alicia B. Peñéñory y Roberto A. Rossi. "Article". Canadian Journal of Chemistry 77, n.º 5-6 (1 de junio de 1999): 676–80. http://dx.doi.org/10.1139/v99-037.

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The photostimulated reactions of N-cyclopropyl-N-ethyl p-toluensulfonamide (4) with diphenylphosphide ions (2) in liquid ammonia gave 1,3-bis(diphenylphosphinyl)-1-(N-ethyl)propylamine, isolated as the oxide 5, and 1,3-bis(diphenylphosphinyl)-1-propanol, isolated as the oxide 6, all of them corresponding to the aperture of the cyclopropylaminyl radical intermediate. The reaction of 4 with 2 in excess and longer reaction times gave only 5 (73% yield). The photostimulated reactions of N-(n-butyl)-N-cyclobutyl p-toluensulfonamide (13) with 2 in liquid ammonia gave, after oxidation, N-(n-butyl)-N-cyclobutyl diphenylphosphonamide (14) in 94% yield. All these reactions occur by the radical nucleophilic substitution in which aminyl radicals are intermediates. The order of the magnitude of the rate constant for the coupling reaction of a dialkylaminyl radical with 2 could be intermediate between those of the rearrangements of the cyclopropyl and cyclobutylaminyl radicals.Key words: aminyl radicals, SRN1 reactions, radical clocks, photochemistry.
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2

Busfield, WK, ID Grice y ID Jenkins. "The Reaction of Organophosphorus Radicals With Vinyl Acetate and Acrylonitrile in the Presence of an Aminoxyl Radical Scavenger". Australian Journal of Chemistry 48, n.º 3 (1995): 625. http://dx.doi.org/10.1071/ch9950625.

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The radical-trapping technique employing 1,1,3,3-tetramethyl-1,3-dihydro-2H-isoindol-2-yloxyl (1) as a radical scavenger has been used to study the reaction of diphenylphosphinoyl (2) and dimethoxyphosphinoyl (3) radicals with vinyl acetate and acrylonitrile. The phosphorus- centred radicals were generated by hydrogen abstraction from diphenylphosphine oxide and dimethyl phosphite respectively. Diphenylphosphine oxide was approximately three times as reactive as dimethyl phosphite towards hydrogen abstraction by t- butoxyl radicals and four times as reactive as tetrahydrofuran (towards abstraction of an α-hydrogen). Diphenylphosphinoyl radicals were found to be relatively nucleophilic and, in competition experiments, reacted about an order of magnitude faster with acrylonitrile than with vinyl acetate. Dimethoxyphosphinoyl radicals were rather less nucleophilic and reacted only twice as fast with acrylonitrile as they did with vinyl acetate. In the presence of excess aminoxyl (1), both diphenylphosphinoyl and dimethoxyphosphinoyl radicals were efficiently scavenged to produce stable phosphinic and phosphate esters respectively. The rate of scavenging was close to diffusion-controlled (c. 1.8×109 1. mol-1 s-1).
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3

Tran, Dat Phuc, Yuki Sato, Yuki Yamamoto, Shin-ichi Kawaguchi, Shintaro Kodama, Akihiro Nomoto y Akiya Ogawa. "Highly regio- and stereoselective phosphinylphosphination of terminal alkynes with tetraphenyldiphosphine monoxide under radical conditions". Beilstein Journal of Organic Chemistry 17 (20 de abril de 2021): 866–72. http://dx.doi.org/10.3762/bjoc.17.72.

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The homolytic cleavage of the PV(O)–PIII bond in tetraphenyldiphosphine monoxide simultaneously provides both pentavalent and trivalent phosphorus-centered radicals with different reactivities. The method using V-40 as an initiator is successfully investigated for the regio- and stereoselective phosphinylphosphination of terminal alkynes giving the corresponding trans-isomers of 1-diphenylphosphinyl-2-diphenylthiophosphinyl-1-alkenes in good yields. The protocol can be applied to a wide variety of terminal alkynes including both alkyl- and arylalkynes.
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4

Wang, Yingxia, Andreas Eichhöfer, Florian Weigend, Dieter Fenske y Olaf Fuhr. "The coordination behavior of 2,3-bis(diphenylphosphino)maleic-N-phenylimide towards copper, silver, gold and palladium". Dalton Transactions 48, n.º 20 (2019): 6863–71. http://dx.doi.org/10.1039/c8dt05003a.

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5

Zhang, Fuyi, Liming Wang, Cui Zhang y Yufen Zhao. "Novel regio- and stereoselective phosphonyl radical addition to glycals promoted by Mn(ii)–air: syntheses of 1,2-dideoxy 2-C-diphenylphosphinylglycopyranosides". Chem. Commun. 50, n.º 16 (2014): 2046–48. http://dx.doi.org/10.1039/c3cc48806c.

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The novel Mn(ii)–air promoted radical reaction of diphenylphosphine oxide with various glycals in excellent regio- and stereoselectivities generated 1,2-dideoxy-2-C-diphenylphosphinylglycopyranosides.
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6

Sueishi, Yoshimi y Yuko Nishihara. "Spin trapping chemistry of the diphenylphosphinyl radical". Journal of Chemical Research 2001, n.º 2 (1 de febrero de 2001): 84–86. http://dx.doi.org/10.3184/030823401103169054.

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7

Alberti, Angelo, Andrew Hudson, Gian Franco Pedulli, W. Grant McGimpsey y Jeffrey K. S. Wan. "Photochemical reactions of quinonoid compounds with phosphorus derivatives". Canadian Journal of Chemistry 63, n.º 4 (1 de abril de 1985): 917–21. http://dx.doi.org/10.1139/v85-152.

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The photoreactions of tetraethylpyrophosphite, tetraphenylbiphosphine, diphenylphosphine oxide, and tetraethylbiphosphine disulphide with five quinones or quinonoid compounds have been studied by esr spectroscopy; [Formula: see text] and [Formula: see text] radicals add to both carbon–carbon and carbon–oxygen double bonds, whilst with [Formula: see text] and [Formula: see text] radicals only the species resulting from addition to a carbonyl group are observed. It is also reported that the photogenerated quinone triplets react with tetraethylpyrophosphite leading to the formation of diethoxyphosphonyl radicals, which in turn add to other ground state quinone molecules, the diethoxyphosphinyl adduct to a carbonyl group being also formed in the process.
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8

Parsons, Andrew, David Sharpe y Philip Taylor. "Radical Addition Reactions of Diphenylphosphine Sulfide". Synlett 2005, n.º 19 (4 de noviembre de 2005): 2981–83. http://dx.doi.org/10.1055/s-2005-921888.

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9

Wang, Yu, Wei Wang, Ruyun Tang, Zhenhua Liu, Weihua Tao y Zhongxue Fang. "Iron(iii)-catalyzed radical α,β-aminophosphinoylation of styrenes with diphenylphosphine oxides and anilines". Organic & Biomolecular Chemistry 16, n.º 42 (2018): 7782–86. http://dx.doi.org/10.1039/c8ob02151a.

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A Fe-catalyzed highly regioselective α,β-difunctionalization of vinylarenes with diphenylphosphine oxides and anilines is disclosed, in which α,β-aminophosphinoylation is efficiently and conveniently constructed with good functional compatibility and a broad substrate scope.
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10

Korth, H. G., J. Lusztyk y K. U. Ingold. "(Diphenylphosphinoyl)oxyl: an extremely reactive oxygen-centered radical". Journal of Organic Chemistry 55, n.º 2 (enero de 1990): 624–31. http://dx.doi.org/10.1021/jo00289a042.

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Tesis sobre el tema "Diphenylphosphinyl radicals"

1

Grice, I. Darren y n/a. "Some New Aspects of Radical Trapping Using an Aminoxyl Radical Trap". Griffith University. School of Science, 1993. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050915.150556.

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An investigation of the initiation mechanism in the free radical copolymerisation of acrylonitrile and vinyl acetate using the aminoxyl radical trapping technique, employing 1,1 ,3,3-tetramethyl-2,3-dihydro- 1 Hisoindol-2-yloxyl is reported. Based upon the experimental results, the mechanism of initiation is suggested as proceeding via the 'free monomer' mechanism. Additionally, the effect of Lewis acids on the initiation mechanism is reported. A study of the addition of phosphorus-centred radicals to alkenes and phenylacetylene, utilising the aminoxyl radical trapping technique is reported. The results indicate a decreased rate of addition by both diphenylphosphinyl and dimethoxyphosphinyl radicals to cyclic versus acyclic alkenes. In contrast to cyclic alkenes, both these phosphorus-centred radicals add readily to the triple bond of phenylacetylene. The stereochemistry of the addition of diphenyiphosphinyl and dimethoxyphosphinyl radicals and of the aminoxyl trap is discussed. The stereochemistry of the addition of benzoyloxyl radicals to a conformationally rigid alkene, trans-a2-octalin is reported. Attempts to examine the initiation mechanism in the free radical copolymerisation of styrene/maleic anhydride and of styrene/tetracyanoethylene utilising the aminoxyl radical trapping technique are described. Also described are attempts to synthesise some new phosphorus radical initiators.
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2

Grice, I. Darren. "Some New Aspects of Radical Trapping Using an Aminoxyl Radical Trap". Thesis, Griffith University, 1993. http://hdl.handle.net/10072/365216.

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An investigation of the initiation mechanism in the free radical copolymerisation of acrylonitrile and vinyl acetate using the aminoxyl radical trapping technique, employing 1,1 ,3,3-tetramethyl-2,3-dihydro- 1 Hisoindol-2-yloxyl is reported. Based upon the experimental results, the mechanism of initiation is suggested as proceeding via the 'free monomer' mechanism. Additionally, the effect of Lewis acids on the initiation mechanism is reported. A study of the addition of phosphorus-centred radicals to alkenes and phenylacetylene, utilising the aminoxyl radical trapping technique is reported. The results indicate a decreased rate of addition by both diphenylphosphinyl and dimethoxyphosphinyl radicals to cyclic versus acyclic alkenes. In contrast to cyclic alkenes, both these phosphorus-centred radicals add readily to the triple bond of phenylacetylene. The stereochemistry of the addition of diphenyiphosphinyl and dimethoxyphosphinyl radicals and of the aminoxyl trap is discussed. The stereochemistry of the addition of benzoyloxyl radicals to a conformationally rigid alkene, trans-a2-octalin is reported. Attempts to examine the initiation mechanism in the free radical copolymerisation of styrene/maleic anhydride and of styrene/tetracyanoethylene utilising the aminoxyl radical trapping technique are described. Also described are attempts to synthesise some new phosphorus radical initiators.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Science
Science, Environment, Engineering and Technology
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Capítulos de libros sobre el tema "Diphenylphosphinyl radicals"

1

Pardasani, R. T. y P. Pardasani. "Magnetic properties of 17-electron tantalum-centered radical containing carbonyl and 1,2-bis(diphenylphosphino)ethane ligands". En Magnetic Properties of Paramagnetic Compounds, 299–300. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54228-6_163.

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