3457-90-7Relevant academic research and scientific papers
PROCESS FOR THE MANUFACTURE OF OMEGA NITROOXY-1-ALKANOLS
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Page/Page column 10-11; 12, (2020/05/06)
The invention relates to a process for the preparation of ω-nitroxyC3-10 alkane-1-ols comprising the nitration of an α,ω-C 3-10 alkanediol with a nitration agent, optionally in the presence of a nitrite trapping agent, characterized in that the nitration agent is a mixture consisting of 50 to 75 wt.-% of nitric acid in water wherein the nitric acid is used in an amount selected in the range from 0.5 to 5 mol equivalents based on the α,ω--C3-10alkanediols, and wherein the nitration is carried out at a temperature selected in the range from 65 - 100°C.
USE OF NITROOXY ORGANIC MOLECULES IN FEED FOR REDUCING METHANE EMISSION IN RUMINANTS, AND/OR TO IMPROVE RUMINANT PERFORMANCE
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Paragraph 0132; 0133, (2014/06/11)
The present invention relates to a method for reducing the production of methane emanating from the digestive activities of a ruminant and/or for improving ruminant animal performance by using, as active compound at least one organic molecule substituted at any position with at least one nitrooxy group, or a salt thereof, which is administrated to the animal together with the feed. The invention also relates to the use of these compounds in feed and feed additives such as premix, concentrates and total mixed ration (TMR) or in the form of a bolus.
Synthesis of nitric acid esters from alcohols in a dinitrogen pentoxide/carbon dioxide liquid system
Kuchurov, Ilya V.,Fomenkov, Igor V.,Zlotin, Sergei G.,Tartakovsky, Vladimir A.
experimental part, p. 67 - 69 (2012/07/02)
Organic nitric acid esters have been prepared in 89-98% yield by the nitration of the corresponding alcohols and polyols with N2O5 in liquid CO2.
Separation of Diastereomeric and Enantiomeric Alkyl Nitrates - Systematic Approach to Chiral Discrimination on Cyclodextrin LIPODEX-D
Schneider, Manfred,Ballschmiter, Karlheinz
, p. 539 - 544 (2007/10/03)
High-resolution gas chromatographic separation of all diastereomeric monomethyl-substituted cyclohexyl nitrates is shown on a nonpolar methylpolysiloxane stationary phase, and the first application of this procedure to the environmental diastereomeric analysis of alkyl nitrates is presented.Two characteristic signals in the achiral analysis of atmospheric samples could be assigned to the smallest alkyl nitrate containing two asymmetric carbon atoms, 3-methyl-2-pentyl nitrate.Retention indices in the temperature-programmed separation based on the n-alkanes were determined.The homologous series of 1-alkyl nitrates were found to be useful as ECD-visible n-alkanes.Enantiomeric separation of alkyl nitrates was achieved on heptakis(3-O-acetyl,-2,6-di-O-pentyl)-β-cyclodextrin (LIPODEX-D).The influence of the nitrooxy group and the alkyl chain length on the chiral discrimination on LIPODEX-D is discussed for 25 chiral alkyl nitrates.The absolute configurations of some alkyl nitrates were assigned by asymmetric synthesis of enantiomerically pure references.The complexity of the alkyl nitrate mixtures present in air samoles does not allow a direct chiral separation as the alkyl nitrates partly coelute on the LIPODEX-D column.Column coupling of LIPODEX-D with a polar achiral stationary phase like polyalkylenglocol (PAG) was successfully applied to solve this problem, and the chiral alkyl nitrates present in a typical air sample were separated.A systematic nomenclature for alkyl nitrates is introduced to handle the steadily growing number of branched and long-chain nitrates detected in environmental analysis. - Keywords: analytical methods; alkyl nitrates; chiral resolution; cyclodextrins; gas chromatography
Preparation of di- and polynitrates by ring-opening nitration of oxetanes by dinitrogen pentoxide (N2O5)
Golding,Millar,Paul,Richards
, p. 7051 - 7062 (2007/10/02)
Ten oxetanes bearing various substituents were reacted with N2O5 in chlorinated hydrocarbon solvents to yield 1,3-dinitrate esters (I) by ring-opening nitration. The yields ranged from 73 to 88% for di-/trinitrates derived from oxetanes unsubstituted in the 2-position, to only 15 to 21% for oxetanes bearing such substituents. Although selective ring cleavage of oxetanes bearing non-hydroxylic substituents (epoxy (oxiranyl), spiro-oxetane and alkene) was not, in general, possible, selective nitration of hydroxyalkyloxetanes was achievable under the conditions employed to yield nitrato-methyloxetanes useful as precursors for energetic polyethers. A semi-quantitative reactivity comparison with representative epoxides indicated that the reactivity of oxetanes towards N2O5 was lower, as expected on account of their lower ring strain.
Process for the production of high energy materials
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, (2008/06/13)
A process for the production of a high energy nitrate ester involves reacting, in an inert organic solvent, a heterocyclic compound, selected from oxiranes, oxetanes, N-substituted aziridines and N-substituted azetidines, with either N2 O4 or N2 O5, and when the compound is reacted with N2 O4, oxidizing the O- or N-nitrate substituents or substituent in the product to O- or N-nitrate substituent or substituents. The remaining ring carbon atoms on the heterocyclic compound may be substituted or unsubstituted. Preferred substituent groups for the C and/or N ring atoms on the compound include alkyl, cyanoalkyl, haloalkyl, nitroalkyl, and substituted aryl. Several novel nitrate ester are also provided, including nitrated derivatives of polybutadiene, in which between 1% and 25% of the carbon atoms in the polymer are substituted by vicinal nitrate ester (--ONO2) groups.
