Reaction of N,N,N',N'-Tetramethyloxamide with Bromine

Reaction of bromine with N,N,N',N'-tetramethyloxamide results in dibromobromate of 3-methyl-5-dimethylimmoniooxazolidin-4-one (in an open system) and in dibromobromate of 4,5,-dibromo-1,3-dimethylimidazolium (in a closed system).     

Reaction of cyanamides with N,N-binucleophiles

Reactions of 4,6-dimethylpyrimidin-2-yl-and aroylcyanamides with benzene-1,2-diamine, ethylenediamine, cyclohexane-1,2-diamine, and naphthalene-1,8-diamine leads to 1H-benzimidazol-2-amine, imidazolidin-2-imine, perhydrobenzimidazol-2-imine, and 1H-perimidin-2-amine derivatives, respectively.     

Reaction of N,N-Dialkylcarboxamides with Halogens

N,N-Dialkylcarboxamides react with halogens in the absence of water to form complexes which are likely to have an ionic structure with the Hlg⁺ ion coordinated at the carbonyl oxygen atom. These products can be isolated as individual compounds. Complexes with bromine undergo further transformations to afford bis-dialkylamide hydrogen tribromide and the corresponding -bromo amide. When the reaction is carried out in the presence of water, the products are only bis-dialkylamide hydrogen tribromides; here, the N-alkyl groups act as a source of protons.     

Reaction of phenyl azide with N,N-dimethyl-aminomethylenephenylphosphines

Phenyl azide reacts with N,N-dimethylamino-P-phenylmethylenephosphines with cleavage of the phosphoruscarbon double bond and formation of the dimer of diiminophosphorane and amidines.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2381–2382, October, 1989.     

Reaction of N,N-dichlorosulfonamides with aryl isothiocyanates

The reaction of aryl isothiocyanates with the N,N-dichloroamides of arenesulfonic acids and with the morpholide of sulfamic acid has been studied. Instead of the expected products of the oxidative imination of the aryl isothiocyanates, 2-(arylsulfonylamino)benzothiazoles and 2-(morpholinosulfonylamino)benzothiazoles, respectively, were obtained.     

Reaction of ethanesulfenyl chloride with N,N-diethylethanesulfenamide

Conclusions The reaction of N,N-diethylethanesulfenamide with ethanesulfenyl chloride or with diethylamine hydrochloride leads to the formation of N,N-diethyl-,-bis(ethylthio)vinylamine, diethyl disulfide, anddiethyl trisulfide.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2499–2503, November, 1971.     

Reaction of N,N,N′-trifluoroamidines of unsubstituted carboxylic acids with sodium ethoxide

Conclusions The N,N,N-trifluoroamidines of unsubstituted aliphatic carboxylic acids react easily with sodium ethoxide to give the corresponding N-fluoroimino ethers and esters.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2802–2803, December, 1978.     

Synthesis of Highly Functionalized N,N-Diarylamides by an Anodic C,N-Coupling Reaction

We report an innovative, sustainable and straightforward protocol for the synthesis of N,N-diarylamides equipped with nonprotected hydroxyl groups by using electrosynthesis. The concept allows the application of various substrates furnishing diarylamides with yields up to 57 % within a single and direct electrolytic protocol. The method is thereby easy to conduct in an undivided cell with constant current conditions offering a versatile and short-cut alternative to conventional pathways.     

Reaction of N,N-dimethylcarbamoyl bromide with 1,2,4-triazines

The acylation of substituted 1,2,4-triazines with N,N-dimethylcarbamoyl bromide was studied. 4,5-Dihydro-4-(N,N-dimethylcarbamoyl)-3-thioxo(oxo)-5-oxo-6-R-1,2,4-triazines were synthesized. The spectral characteristics of the synthesized compounds are discussed.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 969–971, July, 1989.     

Reaction of triethylgermyllithium with carboxylic acid N,N-dialkylamides

Conclusions The reaction of Et₃GeLi with the N,N-dialkylamides of the benzoic, acetic, and trimethylacetic acids leads to the corresponding acyltriethylgermanes, RCOGeEt₃, and the products of their transformation by the Li derivatives that are present.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 949–951, April, 1982.     

Hyperfine coupling constants of the azafullerenes C19N, C59N, C69N, and C75N

The isomers of the nitrogen-substituted fullerenes (azafullerenes) C19N, C59N, C69N, and C75N are examined using all-electron Gaussian atomic orbital basis density functional theory, to determine the doublet radical geometries and hyperfine coupling constants. We find that the inaccuracy of previously calculated hyperfine coupling constants of C59N resulted from a poor treatment of the geometry optimization. We find that UB3LYP minimization of the radical geometry in the 6-31G basis, followed by single-point evaluation of the hyperfine constants in which an expanded basis is used on the atomic sites of interest, forms an efficient compromise between computational cost and accuracy with respect to experimental hyperfine constants. Using this approach, we assign the hyperfine signals observed in experiments on the C69N radical by calculating the hyperfine coupling constants for all five of the isomers and examine the electron spin density distribution. Finally, we present predicted hyperfine coupling constants for the isomers of C19N and C75N for use in the interpretation of future experiments.     

Reaction of H with C2N2 at pressures near 1 torr

The rate of disappearance of C₂N₂ in the presence of a large excess of H atoms has been measured in a discharge-flow system at pressures near 1 torr and temperatures in the range of 282–338 K. Under these conditions the reaction has a small negative temperature coefficient. A transition from second-order to third-order kinetics with decreasing pressure occurs at pressures near 1 torr. The results are discussed in terms of the mechanism where k₇ = (1.5 ± 0.2) × 10^–15 cm³/molec¹·sec is found for the forward rate of reaction (7). The results also give k₇k₈/k_?7 = 3.7 × 10^?31 cm⁶/molec²·sec and k₇k₉/k_?7 = 3.0 × 10^?32 cm⁶/molec²·sec, the first being probably an upper limit and the second probably a lower limit; hence k₈/k₉ = 12 is found as an upper limit.     

N,N′-二芳基硫代草酰胺与1,2-二溴乙烷的反应的研究

以N,N′-二芳基二硫代草酰胺与1,2-二溴乙烷进行S烷基化反应,合成了一系列2,3-双芳基亚氨基-1,4-二硫杂环己烷,反应在4 h内完成,产率52%～62%.产物结构经元素分析,IR,1H NMR及MS表征,并以单晶X射线衍射分析进一步确证.