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Journal articles on the topic 'Azide Trapping'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Bock, Hans, та Ralph Dammel. "Gasphasen-Reaktionen, 58 [1, 2] β-Chlorethylazid: HCl-Eliminierung und Pyrolyse / Gas Phase Reactions, 58 [1, 2] β-Chloroethyl Azide: HCl Elimination and Pyrolysis". Zeitschrift für Naturforschung B 42, № 3 (1987): 301–7. http://dx.doi.org/10.1515/znb-1987-0309.

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The HCl elimination from β-chloroethyl azide (1-azido-2-chloroethane) over potassium tert. butanolate at 350 K in a low pressure flow system is optimized using PE spectroscopic real-time gas analysis. The highly explosive vinyl azide formed can be purified by cool-trapping the by-products. Its subsequent and virtually hazard-free pyrolysis yields 2H-azirine, which can be isolated at temperatures below 240 K.In contrast, the direct pyrolysis of β-chloroethyl azide requires temperatures above 710 K and results in a simultaneous split-off of both HCl and N2, yielding acetonitrile as the main ther

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2

Bott, Tina M., Bren Jordan Atienza, and F. G. West. "Azide trapping of metallocarbenes: generation of reactive C-acylimines and domino trapping with nucleophiles." RSC Adv. 4, no. 60 (2014): 31955–59. http://dx.doi.org/10.1039/c4ra06044j.

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3

Liang, Tsuei-Yun, and Gary B. Schuster. "Photolysis of 3-nitrophenyl azide: Trapping the reactive intermediates." Tetrahedron Letters 27, no. 29 (1986): 3325–28. http://dx.doi.org/10.1016/s0040-4039(00)84786-3.

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4

Pramanik, Suman, and Prasanta Ghorai. "Trapping of Azidocarbenium Ion: A Unique Route for Azide Synthesis." Organic Letters 16, no. 8 (2014): 2104–7. http://dx.doi.org/10.1021/ol5008235.

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5

Bott, Tina M., Bren Jordan Atienza, and West F. G. West F. G. "ChemInform Abstract: Azide Trapping of Metallocarbenes: Generation of Reactive C-Acylimines and Domino Trapping with Nucleophiles." ChemInform 46, no. 8 (2015): no. http://dx.doi.org/10.1002/chin.201508176.

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6

Kalyanaraman, B., E. G. Janzen, and R. P. Mason. "Spin trapping of the azidyl radical in azide/catalase/H2O2 and various azide/peroxidase/H2O2 peroxidizing systems." Journal of Biological Chemistry 260, no. 7 (1985): 4003–6. http://dx.doi.org/10.1016/s0021-9258(18)89222-5.

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7

Chahoua, Latifa, Alain Vigroux, Yvonne Chiang, and James C. Fishbein. "Formation and nucleophilic capture of N-nitrosiminium ions." Canadian Journal of Chemistry 77, no. 5-6 (1999): 1148–61. http://dx.doi.org/10.1139/v99-108.

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A study of the solvolysis of a series of (N-nitrosomethylamino)arylmethyl esters and azides and the products of nucleophilic trapping of the corresponding N-nitrosiminium ion intermediates in aqueous media, 25°C, ionic strength 1 M is reported. Structure-reactivity data for the forward and reverse reactions have been obtained. In three cases, the rate constants for reactions of the cations with nucleophiles have been measured directly by laser flash photolysis. The data allow a comparison of the degree to which the N-methyl-N-nitroso functionality enhances cation stability from a thermodynamic

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8

Snider, Barry B., and Jeremy R. Duvall. "Termination of Mn(III)-Based Oxidative Cyclizations by Trapping with Azide." Organic Letters 6, no. 8 (2004): 1265–68. http://dx.doi.org/10.1021/ol049805s.

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9

Luu, Thanh, Robert McDonald, and Rik R. Tykwinski. "Regioselective Trapping of Terminal Di-, Tri-, and Tetraynes with Benzyl Azide." Organic Letters 8, no. 26 (2006): 6035–38. http://dx.doi.org/10.1021/ol062522a.

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10

Topczewski, Joseph, and Matthew Porter. ""It’s a (Kinetic) Trap!" – Selectively Differentiating Allylic Azide Isomers." Synlett 29, no. 12 (2018): 1537–42. http://dx.doi.org/10.1055/s-0037-1609479.

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Allylic azides are known to undergo the Winstein rearrangement and are often isolated as an equilibrating mixture of isomers. While this process has been known for almost 60 years, very few synthetic applications of this process have been reported. The absence of methods exploiting these intermediates likely stems from a paucity of approaches for gaining the required selectivity to differentiate the isomers. Our lab has made some progress in leveraging this unusual reaction into practical synthetic methodology. Presented herein is a summary of our lab’s recent accomplishments in selectively tr

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11

Pramanik, Suman, and Prasanta Ghorai. "ChemInform Abstract: Trapping of Azidocarbenium Ion: A Unique Route for Azide Synthesis." ChemInform 45, no. 42 (2014): no. http://dx.doi.org/10.1002/chin.201442068.

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12

Britigan, B. E., D. J. Hassett, G. M. Rosen, D. R. Hamill, and M. S. Cohen. "Neutrophil degranulation inhibits potential hydroxyl-radical formation. Relative impact of myeloperoxidase and lactoferrin release on hydroxyl-radical production by iron-supplemented neutrophils assessed by spin-trapping techniques." Biochemical Journal 264, no. 2 (1989): 447–55. http://dx.doi.org/10.1042/bj2640447.

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Hydroxyl radical (.OH) formation by neutrophils in vitro requires exogenous iron. Two recent studies [Britigan, Rosen, Thompson, Chai & Cohen (1986) J. Biol. Chem. 261, 17026-17032; Winterbourn (1987) J. Clin. Invest. 78, 545-550] both reported that neutrophil degranulation could potentially inhibit the formation of .OH, but differed in their conclusions as to the responsible factor, myeloperoxidase (MPO) or lactoferrin (LF). By using a previously developed spin-trapping system which allows specific on-line detection of superoxide anion (O2-) and .OH production, the impact of MPO and LF re

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13

Meier, B., H. H. Radeke, S. Selle та ін. "Human fibroblasts release reactive oxygen species in response to interleukin-1 or tumour necrosis factor-α". Biochemical Journal 263, № 2 (1989): 539–45. http://dx.doi.org/10.1042/bj2630539.

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Human fibroblasts in primary culture released reactive oxygen species upon stimulation with cytokines such as interleukin-1 alpha (IL-1) or tumour necrosis factor-alpha (TNF). The primary radical produced was O2.- as determined by e.s.r. spin trapping and cytochrome c reduction. In contrast to the oxidative burst in granulocytes and monocytes, radical formation took place continuously for at least 4 h. Low-level chemiluminescence was increased by stimulation with IL-1 and TNF. Spectral characteristics and tests with azide led to the conclusion that the photoemissive species were excited carbon

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14

Maldotti, Andrea, Rossano Amadelli, and Vittorio Carassiti. "An electron spin resonance spin trapping investigation of azide oxidation on TiO2 powder suspensions." Canadian Journal of Chemistry 66, no. 1 (1988): 76–80. http://dx.doi.org/10.1139/v88-011.

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The oxidation of azide has been studied on TiO2 powder suspensions in water, methanol, and mixtures of the two solvents. The esr spin trapping technique has been employed to provide evidence for the formation of azidyl radicals [Formula: see text]. The results show that an aqueous alkaline medium is necessary to obtain a high production of [Formula: see text] radicals. A mechanism is proposed whereby the oxidation of [Formula: see text] is mainly due to reaction with OH• radicals which are in turn generated upon capture of holes by OH− groups adsorbed on TiO2. Azidyl anions adsorb weakly on Ti

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15

Kartvelishvili, Tamar, Marina Abuladze, Nino Asatiani, et al. "Estimation of the Cellular Antioxidant Response to Chromium Action Using ESR Method." Scientific World JOURNAL 4 (2004): 785–94. http://dx.doi.org/10.1100/tsw.2004.136.

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In the present study, the antioxidant capacity of chromium-treated L-41 (human epithelial-like cells) was investigated by the ESR spin-trapping technique. The crude cell extracts of the cells grown in the presence of 2 µM (nontoxic) and 20 µM (toxic) chromium (VI) concentrations were tested in the model Fenton system with and without catalase-inhibitor sodium azide. The presented approach using the ESR technique along with inhibitors lets us discern cell extract defense capacity connected with the enzymatic activity in viable cells and the catabolic activity in dying cells.

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16

Amadelli, Rossano, Andrea Maldotti, Carlo Bartocci, and Vittorio Carassiti. "ESR spin-trapping investigation of azide oxidation on cadmium sulfide and zinc oxide suspensions." Journal of Physical Chemistry 93, no. 17 (1989): 6448–53. http://dx.doi.org/10.1021/j100354a034.

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17

Ruane, Patrick H., Robert A. McClelland, A. Frank Hegarty, and Steen Steenken. "Photochemical generation of the N-isopropylbenzonitrilium ion and unusually slow trapping by azide ion." Journal of the Chemical Society, Perkin Transactions 2, no. 1 (1999): 43–48. http://dx.doi.org/10.1039/a807346e.

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18

Partridge, R. S., S. M. Monroe, J. K. Parks, et al. "Spin Trapping of Azidyl and Hydroxyl Radicals in Azide-Inhibited Rat Brain Submitochondrial Particles." Archives of Biochemistry and Biophysics 310, no. 1 (1994): 210–17. http://dx.doi.org/10.1006/abbi.1994.1159.

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19

Murata, Shigeru, Shizue Abe, and Hideo Tomioka. "Photochemical Reactions of Mesityl Azide with Tetracyanoethylene: Competitive Trapping of Singlet Nitrene and Didehydroazepine." Journal of Organic Chemistry 62, no. 10 (1997): 3055–61. http://dx.doi.org/10.1021/jo9622901.

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20

Bolton, Judy L., and Robert A. McClelland. "Azide ion trapping and lifetime in aqueous solution of a primary carbenium ion stabilized by a 2-imidazoyl ring." Canadian Journal of Chemistry 67, no. 7 (1989): 1139–43. http://dx.doi.org/10.1139/v89-171.

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2-Chloromethyl-1-methylimidazole undergoes a pH-dependent aqueous hydrolysis with the neutral substrate being the reactive species, and the imidazole-protonated form (pKa = 5.7) unreactive. Addition of sodium chloride retards the hydrolysis, evidence that there is a free carbenium ion intermediate (the common ion effect). The rate constant ratio Kcl/Kw for the reactions of this cation with the added chloride and with the solvent is 7.4 M−1. Further evidence for a free cation is the observation of the 2-azidomethyl product when the hydrolysis is carried out with sodium azide present, but with n

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21

Gagné, Michel, and Brandon Moyer. "Taming Silylium Ions for Synthesis: N-Heterocycle Synthesis via Stereoselective C–C Bond Formation." Synlett 28, no. 18 (2017): 2429–34. http://dx.doi.org/10.1055/s-0036-1590967.

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Silylium ions (formally [R3Si]+) have long been the subject of investigations and significant debate in both theoretical and experimental chemistry, but few catalytic, synthetic applications have been reported due to the exceptionally high reactivity and Lewis acidity of these elusive species. Results to be discussed include the application of easily accessible silylium ion catalysts to the stereoselective synthesis of various N-heterocyclic pyrrolidine and piperidine scaffolds. The tested substrates are derived from the chiral pool and can be obtained in three high-yielding steps from amino a

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22

Novak, Michael, Kelly J. Kayser, and Michael E. Brooks. "Azide and Solvent Trapping of Electrophilic Intermediates Generated during the Hydrolysis ofN-(Sulfonatooxy)-N-acetyl-4-aminostilbene." Journal of Organic Chemistry 63, no. 16 (1998): 5489–96. http://dx.doi.org/10.1021/jo980500z.

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23

Ohkata, Katsuo, Mikiko Mase, and Kin-ya Akiba. "Reaction of silyl enol ethers with N-chlorosuccinimide: trapping of the siloxycarbinyl cation by an azide anion." Journal of the Chemical Society, Chemical Communications, no. 22 (1987): 1727. http://dx.doi.org/10.1039/c39870001727.

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24

Murata, Shigeru, Yoko Mori, Youji Satoh, Ryuichi Yoshidome, and Hideo Tomioka. "New Findings in Photochemistry ofp-Nitrophenyl Azide in the Presence of an Amine: Generation and Trapping of Enamines." Chemistry Letters 28, no. 7 (1999): 597–98. http://dx.doi.org/10.1246/cl.1999.597.

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25

Novak, Michael, and Stephen A. Glover. "Generation and Trapping of the 4-Biphenylyloxenium Ion by Water and Azide: Comparisons with the 4-Biphenylylnitrenium Ion." Journal of the American Chemical Society 126, no. 25 (2004): 7748–49. http://dx.doi.org/10.1021/ja047488e.

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26

Fishbein, James C., and Robert A. McClelland. "Azide ion trapping of the intermediate in the Bamberger rearrangement. Lifetime of a free nitrenium ion in aqueous solution." Journal of the American Chemical Society 109, no. 9 (1987): 2824–25. http://dx.doi.org/10.1021/ja00243a045.

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27

Ionita, Petre, Bruce C. Gilbert, and Adrian C. Whitwood. "Authentic versus alternative mechanisms in spin trapping. Formation of azide spin-adducts in biphasic and non-aqueous systems by the oxidation of azide anion with a variety of hydrazyl radicals." Journal of the Chemical Society, Perkin Transactions 2, no. 12 (2000): 2436–40. http://dx.doi.org/10.1039/b006616h.

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28

Calle, Paloma, Almudena Fernández-Arizpe, and Carlos Sieiro. "Photosensitization by Harmine: An ESR Spin Trapping Study on the Generation of the Superoxide Anion Radical." Applied Spectroscopy 50, no. 11 (1996): 1446–51. http://dx.doi.org/10.1366/0003702963904719.

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Harmine was in situ UV-irradiated in the presence of 5,5-dimethyl-1-pyrroline- N-oxide (DMPO), α-phenyl- N-tert-butyl nitrone (PBN), or α-(4-pyridyl-1-oxide) N-tert-butyl nitrone (4-POBN) as spin traps and observed by electron spin resonance (ESR) spectroscopy. The superoxide radical (O2·−) was detected as the corresponding DMPO, PBN, or 4-POBN spin adduct in dimethylsulfoxide (DMSO) or acetonitrile solution. The detection of these spin adducts was prevented by the addition of superoxide dismutase (SOD) to the solution. Also, the O2·− adduct formation was inhibited by the addition of antioxida

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29

Kartvelishvili, Tamar, Marina Abuladze, Nino Asatiani, et al. "Antioxidant Capacity of Cultured Mammalian Cells Estimated by ESR Method." Scientific World JOURNAL 4 (2004): 490–99. http://dx.doi.org/10.1100/tsw.2004.99.

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In the present study, the antioxidant capacity against hydrogen peroxide (H2O2), one of the stress-inducing agents, was investigated in two distinct cell lines: L-41 (human epithelial-like cells) and HLF (human diploid lung fibroblasts), which differ in tissue origin, life span in culture, proliferate activity, and special enzyme system activity. The cell antioxidant capacity against H2O2was estimated by the electron spin resonance (ESR) spin-trapping technique in the Fenton reaction system via Fe+2ion action with H2O2resulting in hydroxyl radical generation. The effects of catalase inhibitors

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30

Rostami, Ali, Yong Wang, Atta M. Arif, Robert McDonald, and F. G. West. "Intramolecular Azide Trapping of the Nazarov Intermediate: Formation of Peroxy-Bridged Indolizidinones via a Deep-Seated Rearrangement and Aerobic Oxidation." Organic Letters 9, no. 4 (2007): 703–6. http://dx.doi.org/10.1021/ol070053m.

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31

NOVAK, M., K. J. KAYSER, and M. E. BROOKS. "ChemInform Abstract: Azide and Solvent Trapping of Electrophilic Intermediates Generated During the Hydrolysis of N-(Sulfonatooxy)-N-acetyl-4-aminostilbene." ChemInform 29, no. 51 (2010): no. http://dx.doi.org/10.1002/chin.199851119.

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32

Ionita, Petre, Bruce C. Gilbert, and Adrian C. Whitwood. "ChemInform Abstract: Authentic versus Alternative Mechanisms in Spin Trapping. Formation of Azide Spin-Adducts in Biphasic and Non-aqueous Systems by the Oxidation of Azide Anion with a Variety of Hydrazyl Radicals." ChemInform 32, no. 12 (2001): no. http://dx.doi.org/10.1002/chin.200112051.

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33

Nallagangula, Madhu, and Kayambu Namitharan. "Copper-Catalyzed Sulfonyl Azide–Alkyne Cycloaddition Reactions: Simultaneous Generation and Trapping of Copper–Triazoles and −Ketenimines for the Synthesis of Triazolopyrimidines." Organic Letters 19, no. 13 (2017): 3536–39. http://dx.doi.org/10.1021/acs.orglett.7b01500.

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34

Murata, Shigeru, Yoko Mori, Youji Satoh, Ryuichi Yoshidome, and Hideo Tomioka. "ChemInform Abstract: New Findings in Photochemistry of p-Nitrophenyl Azide in the Presence of an Amine: Generation and Trapping of Enamines." ChemInform 30, no. 46 (2010): no. http://dx.doi.org/10.1002/chin.199946142.

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35

Chen, Yeong-Renn, Bradley E. Sturgeon, Michael R. Gunther, and Ronald P. Mason. "An ESR spin trapping of the cyanyl radical in cyanide/cytochrome c oxidase and azidyl radical in azide/cytochrome c oxidase/H2O2 systems." Free Radical Biology and Medicine 25 (January 1998): S15. http://dx.doi.org/10.1016/s0891-5849(98)90033-8.

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36

Sambol, Matija, Katja Ester, Antonija Husak, Đani Škalamera, Ivo Piantanida, and Nikola Basarić. "Bifunctional Phenol Quinone Methide Precursors: Synthesis and Biological Activity." Croatica chemica acta 92, no. 1 (2019): 29–41. http://dx.doi.org/10.5562/cca3455.

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New bifunctional quinone methide (QM) precursors, bisphenols 2a–2e, and monofunctional QM precursor 7 were synthesized. Upon treatment with fluoride, desilylation triggers formation of reactive intermediates, QMs, which was demonstrated by trapping QM with azide or methanol. The ability of QMs to alkylate and cross-link DNA was assayed by investigation of the effects of QMs to DNA denaturing, but without conclusive evidence. Furthermore, treatment of a plasmid DNA with compounds 2a–2e and KF, followed by the analysis by alkaline denaturing gel electrophoresis, did not provide evidence for the

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37

Kulis, Jakov, Craig A. Bell, Aaron S. Micallef, and Michael J. Monteiro. "Ultrafast and Reversible Multiblock Formation by the SET-Nitroxide Radical Coupling Reaction." Australian Journal of Chemistry 63, no. 8 (2010): 1227. http://dx.doi.org/10.1071/ch10092.

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The single electron transfer-nitroxide radical coupling (SET-NRC) reaction has been used to produce multiblock polymers with high molecular weights in under 3 min at 50°C by coupling a difunctional telechelic polystyrene (Br-PSTY-Br) with a dinitroxide. The well known combination of dimethyl sulfoxide as solvent and Me6TREN as ligand facilitated the in situ disproportionation of CuIBr to the highly active nascent Cu0 species. This SET reaction allowed polymeric radicals to be rapidly formed from their corresponding halide end-groups. Trapping of these carbon-centred radicals at close to diffus

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38

Minetti, M., T. Forte, M. Soriani, V. Quaresima, A. Menditto, and M. Ferrari. "Iron-induced ascorbate oxidation in plasma as monitored by ascorbate free radical formation. No spin-trapping evidence for the hydroxyl radical in iron-overloaded plasma." Biochemical Journal 282, no. 2 (1992): 459–65. http://dx.doi.org/10.1042/bj2820459.

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A study was made of the interaction of plasma ascorbate and ascorbate free radical (AFR) with exogenously added iron. The quantitative determination of AFR has the advantage that transient increases in ascorbate oxidation can be directly monitored by e.p.r. spectroscopy. An AFR signal was found in the plasma of all donors and was unaffected by superoxide dismutase, catalase and the strong iron chelator deferoxamine. These findings and the rapid decrease in AFR under a nitrogen atmosphere suggest that plasma AFR is probably a result of air auto-oxidation. Iron loading of plasma did not affect t

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39

Mouithys-Mickalad, A., G. Deby-Dupont, M. Hoebeke, M. Mathy-Hartert, M. Lamy, and C. Deby. "Effects of sphingosine and sphingosine analogues on the free radical production by stimulated neutrophils: ESR and chemiluminescence studies." Mediators of Inflammation 6, no. 5-6 (1997): 327–33. http://dx.doi.org/10.1080/09629359791460.

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Sphingolipids inhibit the activation of the neutrophil (PMN) NADPH oxidase by protein kinase C pathway. By electron spin resonance spectroscopy (ESR) and chemiluminescence (CL), we studied the effects of sphingosine (SPN) and ceramide analogues on phorbol 12-myristate 13-acetate (PMA, 5 × 10-7M) stimulated PMN (6 × 106cells). By ESR with spin trapping (100 mM DMPO: 5,5-dimethyl-1-pyrroline-Noxide), we showed that SPN (5 to 8 × 10-6M), C2-ceramide (N-acetyl SPN) and C6-ceramide (N-hexanoyl SPN) at the final concentration of 2 × 10-5and 2 × 10-4M inhibit the production of free radicals by stimul

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40

Gronwald, John W., Scott W. Jourdan, Donald L. Wyse, David A. Somers, and Mark U. Magnusson. "Effect of Ammonium Sulfate on Absorption of Imazethapyr by Quackgrass (Elytrigia repens) and Maize (Zea mays) Cell Suspension Cultures." Weed Science 41, no. 3 (1993): 325–34. http://dx.doi.org/10.1017/s0043174500052012.

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Field trials indicated that addition of ammonium sulfate to imazethapyr plus nonionic surfactant increased quackgrass control, especially at low imazethapyr rates. In greenhouse experiments, approximately twice as much imazethapyr was absorbed by quackgrass leaves when the herbicide was applied in combination with nonionic surfactant plus ammonium sulfate than when the herbicide was applied with nonionic surfactant alone. Black Mexican Sweet maize (BMS) suspension-cultured cells were used to evaluate the effects of ammonium sulfate and nonionic surfactant on cellular absorption of imazethapyr

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41

Weigand, Kevin, Neeraj Singh, Manfred Hagedorn, and Klaus Banert. "Direct observation and characterisation of 3-azido-2H-azirines: postulated, but highly elusive intermediates." Organic Chemistry Frontiers 4, no. 2 (2017): 191–95. http://dx.doi.org/10.1039/c6qo00625f.

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The title compounds, including the parent 3-azido-2H-azirine, were generated by low-temperature photolysis of the corresponding 1,1-diazidoethenes, and characterised not only by trapping reactions, but also by direct detection using NMR and in situ IR spectroscopy.

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42

Ezzatzadeh, Elham, Zinatossadat Hossaini, Ali Varasteh Moradi, Masoomeh Salimifard, and Saeid Afshari-Sharif Abad. "Copper iodide and ZnO nanoparticles catalyzed multicomponent synthesis of 1,3-cyclopentadiene: study of antioxidant activity." Canadian Journal of Chemistry 97, no. 4 (2019): 270–76. http://dx.doi.org/10.1139/cjc-2018-0154.

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Zinc oxide (ZnO) nanoparticles, as a simple and recyclable catalyst, were easily synthesized and used for the synthesis of 1,3-cyclopentadiene derivatives by a four-component reaction of terminal alkynes, sulfonyl azides, activated acetylenic compounds, and isocyanides in the presence of copper iodide in acetonitrile at room temperature. In these reactions, 1,3-cyclopentadiene derivatives were obtained in good yield and in a short reaction time. In this research, antioxidant activity was investigated for the some newly synthesized compounds such as 5a–5d using the DPPH radical trapping and red

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43

Banert, Klaus, Manfred Hagedorn, Jens Wutke, Petra Ecorchard, Dieter Schaarschmidt, and Heinrich Lang. "Elusive ethynyl azides: trapping by 1,3-dipolar cycloaddition and decomposition to cyanocarbenes." Chemical Communications 46, no. 23 (2010): 4058. http://dx.doi.org/10.1039/c0cc00079e.

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44

Banert, Klaus, Manfred Hagedorn, Jens Wutke, Petra Ecorchard, Dieter Schaarschmidt, and Heinrich Lang. "ChemInform Abstract: Elusive Ethynyl Azides: Trapping by 1,3-Dipolar Cycloaddition and Decomposition to Cyanocarbenes." ChemInform 41, no. 43 (2010): no. http://dx.doi.org/10.1002/chin.201043031.

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45

Banert, Klaus. "Functionalized Allenes: Generation by Sigmatropic Rearrangement and Application in Heterocyclic Chemistry." Current Organic Chemistry 23, no. 27 (2020): 3040–63. http://dx.doi.org/10.2174/1385272823666191112102523.

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The present review article summarizes the synthesis of allenes, which bear an adjacent functional group, by [3,3]- or [2,3]-sigmatropic rearrangement of appropriate propargyl substrates. Functionalized allenes, such as allenyl isothiocyanates, isoelenocyanates, isocyanates, thiocyanates, azides, azo compounds and others, are easily available by these methods. In several cases, however, the title compounds show high reactivity, which leads to rapid intermolecular or intramolecular successive reactions. Consequently, synthesis of the allenes by sigmatropic rearrangement has to be combined with s

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46

Xu, Meng-Meng, Wen-Bin Cao, Rao Ding, Hai-Yan Li, Xiao-Ping Xu, and Shun-Jun Ji. "Dearomatization of Indoles via Azido Radical Addition and Dioxygen Trapping To Access 2-Azidoindolin-3-ols." Organic Letters 21, no. 16 (2019): 6217–20. http://dx.doi.org/10.1021/acs.orglett.9b02009.

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47

Desamparados Velasco, M., Pedro Molina, Pilar M. Fresneda, and Miguel A. Sanz. "Isolation, Reactivity and Intramolecular Trapping of Phosphazide Intermediates in the Staudinger Reaction of Tertiary Phosphines with Azides." Tetrahedron 56, no. 24 (2000): 4079–84. http://dx.doi.org/10.1016/s0040-4020(00)00322-7.

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Xu, Yong, and Shizheng Zhu. "The reaction of per(poly)fluoroalkanesulfonyl azides with tertiary and secondary amines: generation and trapping of enamines." Tetrahedron 57, no. 20 (2001): 4337–41. http://dx.doi.org/10.1016/s0040-4020(01)00376-3.

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Aleksandrov, Luba, Andrei Aleksandrov, and John R. Riordan. "Mg2+-dependent ATP occlusion at the first nucleotide-binding domain (NBD1) of CFTR does not require the second (NBD2)." Biochemical Journal 416, no. 1 (2008): 129–36. http://dx.doi.org/10.1042/bj20081068.

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Abstract:

ATP binding to the first and second NBDs (nucleotide-binding domains) of CFTR (cystic fibrosis transmembrane conductance regulator) are bivalent-cation-independent and -dependent steps respectively [Aleksandrov, Aleksandrov, Chang and Riordan (2002) J. Biol. Chem. 277, 15419–15425]. Subsequent to the initial binding, Mg2+ drives rapid hydrolysis at the second site, while promoting non-exchangeable trapping of the nucleotide at the first site. This occlusion at the first site of functional wild-type CFTR is somewhat similar to that which occurs when the catalytic glutamate residues in both of t

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Velasco, M. Desamparados, Pedro Molina, Pilar M. Fresneda, and Miguel A. Sanz. "ChemInform Abstract: Isolation, Reactivity, and Intramolecular Trapping of Phosphazide Intermediates in the Staudinger Reaction of Tertiary Phosphines with Azides." ChemInform 31, no. 39 (2000): no. http://dx.doi.org/10.1002/chin.200039049.

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