- Formation and Out-of-Equilibrium, High/Low State Switching of a Nitroaldol Dynamer in Neutral Aqueous Media
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The nitroaldol reaction is demonstrated as an efficient dynamic covalent reaction in phosphate buffers at neutral pH. Rapid equilibration was recorded with pyridine-based aldehydes, and dynamic oligomerization could be achieved, leading to nitroaldol dynamers of up to 17 repeating units. The dynamers were applied in a coherent stimuli-responsive molecular system in which larger dynamers transiently existed out-of-equilibrium in a neutral aqueous system rich in formaldehyde, controlled by nitromethane.
- Elofsson, Ulla,Karalius, Antanas,Kravchenko, Oleksandr,Ramstr?m, Olof,Szabó, Zoltán,Yan, Mingdi,Zhang, Yang
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- Synthesis and crystal structure of 5,5'-dinitro-[5,5'-bi-(1,3,2- dioxathiane)]2,2'-dioxide
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A novel 1,3,2-dioxathiane-2-oxide derivative 5,5'-dinitro-[5,5'-bis(1,3,2- dioxathiane)]2,2'-dioxide was synthesised. Moreover, the molecular structure of the compound was confirmed by the X-ray crystal structure determination.
- Zhang, Pan,Li, Jia-Rong,Yang, De-Li,Shi, Da-Xin
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- IS 1,3-DIHYDROXYPROPANENITRONIC ACID REALLY STABLE?
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The condensation of nitromethane with paraformaldehyde in the presence of catalytic amounts of KF and tetra-n-butylammonium bromide in a medium of isopropanol does not afford stable 1,3-dihydroxypropanenitronic acid.In the neutralization of 2-nitro-1,3-propanediol sodium salt by anhydrous CF3COOH, 2-nitro-1,3-propanediol and 2-nitro-1-propen-3-ol were identified.
- Eremenko, L. T.,Oreshko, G. V.,Lagodzinskaya, G. V.,Zabrodin, V. A.
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- Perchlorate-free pyrotechnic formulations utilizing energetic chlorine donors: 1-CDN, 11-CDN, 13-CDN
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Several novel materials were investigated as energetic chlorine donors, specifically for the preparation of perchlorate-free pyrotechnic formulations with low-smoke output. The novel compounds, 2-chloromethyl-2-methyl-5,5-dinitro- 1,3-dioxane (1-CDN), 2,2-bis(chloromethyl)-5,5-dinitro-1,3-dioxane (13-CDN), and 2-(dichloromethyl)-2-methyl-5,5-dinitro-1,3-dioxane (11-CDN), were formulated with a variety of fuels and oxidizers and their resulting colored flames analyzed for color quality. The preparation and preliminary characterization of these energetic chlorine donors are described. Copyright
- Naud, Darren L.,Hiskey, Michael A.,Chavez, David E.
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- PROCESS FOR THE PREPARATION OF NITROALCOHOLS
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A process of preparing a nitroalcohol, e.g., 2-nitro-2-methyl-1-propane, from a nitropolyol, e.g., 2-nitro-2 -methyl-1,3-propanediol, the process comprising the step of contacting under hydrogenation conditions the nitropolyol with hydrogen, a hydrogenation catalyst and, optionally, a chelating agent.
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Paragraph 0018
(2013/09/26)
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- PROCESS FOR MAKING TERTIARY AMINOALCOHOL COMPOUNDS
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Provided is a process for making a tertiary aminoalcohol compound. The process comprises using an excess amount of a carbonyl compound in a condensation step between the carbonyl compound and a nitroalkane, and conducting a hydrogenation/alkylation step to produce the tertiary aminoalcohol. The process uses fewer steps than conventional processes.
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Page/Page column 13
(2012/04/17)
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- The Reaction of Geminal Bromonitroalkanes with Nucleophiles. Part 1. The Decomposition of 2-Bromo-2-nitropropane-1,3-diol (Bronopol) in Aqueous Base
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2-Bromo-2-nitropropane-1,3-diol decomposes in aqueous base to give tris(hydroxymethyl)nitromethane, glycolic acid, formic acid, methanol and 2,2-dinitroethanol.It also releases NO2(1-) and Br- ions but not BrO-. these products are shown to form via four concurrent decompostion pathways, three of which involve 2-bromo-2-nitroethanol as a reactive intermediate.
- Challis, Brian C.,Yousaf, Taher I.
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p. 283 - 286
(2007/10/02)
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- Addition of aldehydes to organic compounds having a carbon-hydrogen bond activated by a nitro or nitrile group
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Low valent transition metal complexes containing small cone angle phosphine or arsine ligands efficiently catalyze addition of aldehydes to compounds or groups having a C--H bond activated by a nitro or nitrile group, to provide nitroalcohols or cyanohydrins, respectively.
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