- Molybdenum(VI) complexes with N-substituted hydroxylamines
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New molybdenum(VI) complexes with N-monoalkylsubstituted hydroxylamines have been synthesized and studied. The structure of [MoO2(C 2H5NHO)2] and [MoO2(i-C 3H7NHO)2], whose distinguishing feature is the bidentate chelate coordination of the ligand to molybdenum with the formation of the three-membered NMoO chelate ring, has been determined by X-ray diffraction.
- Beirakhov,Orlova,Il'In,Sakharov,Goeva,Churakov,Surazhskaya,Mikhailov
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- Preparation method O - alkyl substituted hydroxylamine salt
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The invention relates to a preparation method of N - alkyl substituted hydroxylamine salt, and belongs to fine chemical engineering. Pesticide or bulk pharmaceutical chemicals technical field. The present invention reacts with the N - alkyl of the oxime with an inorganic salt of hydroxylamine to give N - alkyl-substituted hydroxylamine salt and oxime. The invention provides an efficient and environment-friendly method for preparing N - alkyl substituted hydroxylamine salt, and simultaneously, an N - alkyl substituted hydroxylamine salt is prepared, and the oxime can be re-prepared to form N - alkylate of oxime so as to realize the material circulation. No equivalent acid is used in the reaction process. Alkali neutralization, avoided the current method to use a large amount of acid, alkali and produce inorganic salt solid waste shortcoming, environmental protection more. The preparation method is mild in reaction condition, and the defects of high pollution and high energy consumption of the traditional process are overcome. In-flight R1 , R2 What is R is as claimed in the claims and the description.
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Paragraph 0128-0131
(2021/11/14)
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- PROCESS TO PRODUCE N-METHYLYDROXYLAMINE HYDROCHLORIDE
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The disclosure provides improved processes for preparing N-methylhydroxylamine and N-methylhydroxylamine hydrochloride.
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Page/Page column 10
(2015/06/11)
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- One-pot synthesis and hydroxylaminolysis of asymmetrical acyclic nitrones
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Aromatic aldehydes 1 were reductively aminated to the corresponding secondary amines 2 using NaBH4 in methanol in good yields. Amines 2 were oxidized with H2O2-WO42- regioselectively to nitrones 3, the structures of which were easily determined by reacting them with hydroxylamine hydrochloride as well as by spectral means. The products of hydroxylaminolysis in ether proved to be the corresponding benzaldehyde oximes 4 and benzyl or methyl hydroxylamine hydrochlorides 5. Copyright Taylor & Francis, Inc.
- Coskun, Necdet,Parlar, Aydin
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p. 2445 - 2451
(2007/10/03)
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- N-SUBSTITUTED DERIVATIVES OF (ALPHA)-MERCAPTO ALKYLAMINES, THEIR PREPARATION PROCESS AND THE INTERMEDIATES OBTAINED, THEIR USE AS MEDICAMENTS AND THE COMPOSITIONS CONTAINING THEM
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Novel α-mercapto-alkylamines in all possible racemic, enantiomeric and diastereoisomeric forms of the formula STR1 wherein n, R 1, R 2, X, A, R 3A and R 4A are set forth in the claims and their non-toxic, pharmaceutically acceptable acid addition salts having excellent analgesic, psychotropic and enkephalinase inhibiting properties.
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- Preparation of γ-Substituted β-Oxoesters with a New Heterocyclic Synthon
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Ethyl 2,5-dihydro-2,3-dimethyl-5-oxoisoxazole-4-carboxylate was alkylated and acylated via its potassium-salt generated by potassium t-butoxide under convenient conditions.Hydrolysis of the enamines obtained by the catalytic hydrogenation of the 3-alkylated/acetylated derivatives affords β-oxo and β,δ-dioxoesters, respectively.Hydrogenolysis of the 3-acyl derivatives allows the regiospecific synthesis of β-enamino-δ-oxoesters.
- Doleschall, Gabor,Seres, Peter,Kovacs, Attila
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p. 324 - 346
(2007/10/02)
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- Hydrolysis of Di- and Trimesylhydroxylamines and their Methylated Derivatives
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The mesylhydroxylamines (CH3SO2)2NOH, (CH3SO2)2NOCH3, CH3SO2N(H)OSO2CH3, CH3SO2N(CH3)OSO2CH3 (1-4) and (CH3SO2)2NOSO2CH3 (5) were treated with basic, neutral, and acidic aqueous solutions.The reaction products were identified.Possible decomposition mechanisms were discussed.
- Brink, Klaus,Mattes, Rainer
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p. 351 - 354
(2007/10/02)
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- Hydroxamic acids and esters
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The synthesis of amido substituted naphthalenes and their intermediates is described. The intermediates and amido substituted naphthalenes are useful as anti-inflammatory agents.
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- SYNTHESIS AND STRUCTURE OF E,Z-ISOMERIC FIVE-MEMBERED CYCLIC α-KETO-N-METHYL NITRONES
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The respective E-isomeric nitrones were obtained by methylation of the monooximes of cyclic α-diketones.The photochemical transformation of five-membered cyclic E-α-keto-N-methyl nitrones into the thermodynamically less stable Z isomers was realized for the first time, and the conditions for the preparative realization of the process were determined.Detailed investigation of the IR, UV, PMR and 13C NMR spectra and the dipole moments of the obtained nitrones showed that the dipole moments and PMR spectra are most suitable for determinig the configuration (E or Z).
- Rodina, L. L.,Kuruts, I.,Korobitsyna, I. K.
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p. 1711 - 1722
(2007/10/02)
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