Abstract:
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 N 2 0 4 or N 2 0 5 , and when the compound is reacted with N 2 0 4 , oxidising the 0- 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 (-ON0 2 ) groups.
Abstract translation:制备高能硝酸酯的方法包括在惰性有机溶剂中使选自环氧乙烷,氧杂环丁烷,N-取代的氮丙啶和N-取代的氮杂环丁烷与杂环化合物与N 2 O 4或N 2 O 5反应,当化合物 与N2O4反应,将产物中的O-或N-硝酸盐取代基或取代基氧化成O-或N-硝酸盐取代基。 杂环化合物上的剩余环碳原子可以是取代或未取代的。 化合物上C和/或N环原子的优选取代基包括烷基,氰基烷基,卤代烷基,硝基烷基和取代的芳基。 还提供了几种新的硝酸酯,包括聚丁二烯的硝化衍生物,其中聚合物中1%至25%的碳原子被连位硝酸酯(-ONO 2)基团取代。
Abstract:
Organic nitrites can be produced from a compound which is a mono/polyhydric alcohol or an aldehyde- or ketone-derivate thereof after de-aeration of the same, using NO gas, and stored in an environment saturated with gaseous NO. Organic nitrites produced according to the invention exhibit less impurities and improved storage stability compared to conventionally produced nitrites. The organic nitrites of the invention can easily be formulated into pharmaceutical compositions and have utility for the treatment of various conditions.
Abstract:
The present invention refers to a process for preparing a compound of general formula (A), as reported in the description, wherein R is a radical of a drug and R1-R12 are hydrogen or alkyl groups, m, n, o, q, r and s are each independently an integer from 0 to 6, and p is 0 or 1, and X is O, S, SO, SO2, NR13 or PR13 or an aryl, heteroaryl group, said process comprising reacting a compound of formula (B) R—COOZ (B) wherein R is as defined above and Z is hydrogen or a cation selected from: Li+, Na+, K+, Ca++, Mg++, tetralkylammonium, tetralkylphosphonium, with a compound of formula (C), as reported in the description, wherein R1-R12 and m, n, o, p, q, r, s are as defined above and Y is a suitable leaving group.
Abstract:
PROBLEM TO BE SOLVED: To provide an industrially suitable method for efficiently producing an alkyl nitrite from nitric acid (e.g. byproduct nitric acid in a method for producing an alkyl nitrite from nitrogen monoxide, oxygen and an alkanol as starting materials). SOLUTION: This method for producing the alkyl nitrite comprises contacting an aqueous solution containing nitric acid and an alkanol with a nitrogen monoxide gas, wherein the nitrogen monoxide gas substantially contains no nitrogen oxides which may be formed due to the presence of molecular oxygen in the nitrogen monoxide gas. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing an alkyl nitrite, comprising reacting an alkanol with nitrogen monoxide and oxygen to produce the alkyl nitrite, by which the alkyl nitrite can be efficiently produced at a high production rate. SOLUTION: This method for producing the alkyl nitrite, comprising supplying the alkanol into the upper portion of a reaction tower for producing the alkyl nitrite to flow down to the lower portion of the reaction tower, supplying the nitrogen monoxide and the oxygen or their mixture gas into the lower portion of the reaction tower, and simultaneously reacting the alkanol with the nitrogen monoxide and the oxygen, is characterized by (1) extracting the bottom from the bottom portion of the reaction tower, introducing the bottom into a reactor for converting nitric acid, supplying carbon monoxide or hydrogen to react the nitric acid and the alkanol with the carbon monoxide or the hydrogen in the bottom in the presence of a platinum group metal catalyst to produce the alkyl nitrite, and (2) supplying the produced alkyl nitrite into the alkanol- flowing zone of the reaction tower. COPYRIGHT: (C)2004,JPO
Abstract:
The invention concerns a method for preparing alkyl nitrites of formula (I) R ONO (I) ONO wherein R represents a C1-C20, advantageously C2-C10 linear or branched alkyl group. The invention is characterised in that it consists in gradually and continuously adding in an aqueous medium, an alcohol of formula (II) R OH, R being as defined above, a nitrite of formula (III) M NO2, wherein M represents a metal cation, and a strong acid, so as to form continuously said alkyl nitrite, and in continuously drawing off said alkyl nitrite thus formed from the reaction medium.