- Synthesis and study of organic nitrates of heterofunctional series 5. * Synthesis of 3,3-bis(hydroxymethyl)oxetane mono- and dinitrates and 2,2-bis(hydroxymethyl)propane-1,3-diol (pentaerythritol) mono- and dinitrates
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New procedures were developed for the synthesis of 3,3-bis(hydroxymethyl) oxetane dinitrate (1) by O-nitration of the corresponding glycol (3) or its mononitrate (6), which were prepared by the reactions of 2,2-bis(hydroxymethyl) propane-1,3-diol (pentaerythritol) (2) mono- (4) and dinitrates (5), respectively, with alkali. A new method was devised for the synthesis of compounds 4 and 5 by the reaction of tetraol 2 with concentrated HNO 3 in dichloroethane. The structures of compounds 1 and 6 were established by X-ray diffraction analysis.
- Korolev,Eremenko,Meshikhina,Eremenko,Aleksandrov,Konovalova,Lodygina
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- Method for preparing nitro compound by using graphene to catalyze nitric oxide
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The invention discloses a method for preparing a nitro compound by using graphene to catalyze nitric oxide. A graphene oxide carbon material is used for catalysis of a reaction of nitric oxide and a nitrification substrate such as an aromatic compound to prepare the nitro compound. The method is used for replacing a traditional nitric acid/sulfur acid method to prepare the nitro compound, so thatthe atom utilization rate of the reaction is increased, the energy is saved, and the emission is reduced; and the method has the characteristic of atom economy during industrial preparation of the nitro compound.
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Paragraph 0031; 0032
(2018/06/16)
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- USE OF NITROOXY ORGANIC MOLECULES IN FEED FOR REDUCING METHANE EMISSION IN RUMINANTS, AND/OR TO IMPROVE RUMINANT PERFORMANCE
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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.
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Paragraph 0109; 0110; 0111
(2014/06/11)
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- NO donors. Part 18: Bioactive metabolites of GTN and PETN-Synthesis and vasorelaxant properties
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The vasodilators glyceryl trinitrate (GTN) and pentaerythrityl tetranitrate (PETN) are supposed to be degraded in vivo to the lower nitrates PETriN, PEDN, PEMN, 1,2-GDN, 1,3-GDN, 1-GMN, and 2-GMN. We synthesized these bioactive metabolites as reference compounds for pharmacokinetic studies. The use of HPLC-methods for monitoring the stepwise reduction of PETN to lower nitrates and the syntheses of the glyceryl dinitrates proved advantageous. Furthermore, we measured the vasorelaxant properties of all metabolites by performing organ bath experiments with porcine pulmonary arteries. In general, the vasodilator potency increases with the number of nitrate moieties in the compound.
- Lange, Kathrin,Koenig, Andreas,Roegler, Carolin,Seeling, Andreas,Lehmann, Jochen
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experimental part
p. 3141 - 3144
(2010/01/17)
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- NO donors. Part 16: Investigations on structure-activity relationships of organic mononitrates reveal 2-nitrooxyethylammoniumnitrate as a high potent vasodilator
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The vasoactive properties of 14 organic mononitrates were investigated in vitro using PGF2α-precontracted porcine pulmonary arteries. A surprisingly wide range of vasorelaxant potencies was observed (pD2: 3.36-7.50). Activities showed to be highly sensitive to the molecular structure and the substituents at the molecular carrier of the nitrate group. A correlation between lipophilicity and vasorelaxant potency could not be recognized. 2-Nitrooxyethylammoniumnitrate (1) was found to be slightly superior to the high potency trinitrate GTN.
- Koenig, Andreas,Roegler, Carolin,Lange, Kathrin,Daiber, Andreas,Glusa, Erika,Lehmann, Jochen
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p. 5881 - 5885
(2008/03/14)
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- Pentaerythrite derivatives, the production and use thereof and intermediate products for the synthesis of the same
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The invention relates to novel compounds derived from pentaerythrite compounds of formula (XII) and (XVI), which can be used as pharmaceutically active substances, specially in the treatment of cardiac and circulatory diseases.
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- Electrochemical reduction of pentaerythrityltetranitrate (PETN) and metabolites
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The reduction-cascade of PETN is described as a combination of cyclic-voltammetric measurements and analytical results together with synthesis of PETN-metabolites; furthermore the electroreduction of pentaerythityldinitrate (PEDN) in the presence and absence of cystine as well as cystine and electrogenerated superoxide-radicalanions to elucidate the interaction of PETN with thiol-species. PETN was recognized as precursor for a initial radicalic process, followed by intermediate formation of pentaerythityltxinitratealdehyde (PENA) inside a self-reducing nitrate-system with NO as final product, which may explain its special position in comparison with other pharmaceutically applied nitratestructures. It could be proved, that a cystine-pool reacts as a selective moderator inside the reduction of PEDN without being interfered by O2?-, yielding pentaerythitylmononitrate (PEMN) meanwhile in the absence of cystine only pentaerythrite (PE) is formed.
- Hess, Ulrich,Brosig,Koenig,Stoeter,Stalleicken
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p. 460 - 464
(2007/10/03)
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