共查询到20条相似文献,搜索用时 31 毫秒
1.
S. R. Khafizova V. R. Akhmetova L. F. Korzhova T. V. Tyumkina G. R. Nadyrgulova R. V. Kunakova E. A. Kruglov U. M. Dzhemilev 《Russian Chemical Bulletin》2005,54(2):432-436
Cyclothiomethylation of primary aliphatic amines with the reagent H2S-CH2O (2:3) in aqueous medium mainly gave substituted dithiazines; oxathiazines and dioxazines were obtained from butylamine and ethanolamine. Under the chosen reaction conditions, ethylenediamine was converted into 5-[2-(perhydro-1,3,5-dithiazin-5-yl)ethyl]perhydro-1,3,5-dithiazine or substituted thiazetidine and oxazetidine, depending on the order of mixing of the starting reagents.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 423–427, February, 2005. 相似文献
2.
两种新型双极有机小分子发光材料的合成与发光 总被引:3,自引:0,他引:3
设计和合成了两种新的具有“双极(bipolar)”性质和发光性能的有机小分子化合物N-[4-(5-(2-苯基喹啉-4)-1,3,4-噁二唑-2)苯基]-N'-苯基-N,N'-二苯基-1,1'-联苯基-4,4'-二胺(TPDOPQ)和N,N'-双{4-[5-(2-苯基喹啉-4-基)-1,3,4-噁二唑-2]苯基}-N,N'-二苯基-1,1'-联苯基-4,4'-二胺[TPD(OPQ)2]. 用1H NMR, MS和元素分析进行了表征, 研究了化合物的热稳定性和光致发光性质, 并用循环伏安法测定了其电化学性能. 结果表明, 这两种合成的有机化合物同时具备空穴传导和电子输入双重功能, 光致发光性能优良, 热稳定性好, 能形成均衡薄膜, 因此可作为制作有机电致发光器件的候选材料. 相似文献
3.
Ulf Wellmar 《Journal of heterocyclic chemistry》1998,35(6):1531-1532
The new compound 3-(tert-butyl)perhydro-1,5,3-dithiazepine has been synthesised from 5-(tert-butyl)perhydro-1,3,5-triazin-2-one in 45% yield. In the reaction, urea acts as the leaving group being exchanged for the S-CH2-CH2-S fragment of the product. 相似文献
4.
Dr. Qinghua Zhang Dr. Chunlin He Dr. Ping Yin Prof. Dr. Jean'ne M. Shreeve 《化学:亚洲杂志》2014,9(1):212-217
A new class of nitroguanidyl‐functionalized nitrogen‐rich materials derived from 1,3,5‐triazine and 1,2,4,5‐tetrazine was synthesized through reactions between N‐nitroso‐N′‐alkylguanidines and the hydrazine derivatives of 1,3,5‐triazine or 1,2,4,5‐tetrazine. These compounds were fully characterized using multinuclear NMR and IR spectroscopies, elemental analysis, and differential scanning calorimetry (DSC). The heats of formation for all compounds were calculated with Gaussian 03 and then combined with experimental densities to determine the detonation pressures (P) and velocities (Dv) of the energetic materials. Interestingly, some of the compounds exhibit an energetic performance (P and Dv) comparable to that of RDX, thus holding promise for application as energetic materials. 相似文献
5.
V. R. Akhmetova G. R. Nadyrgulova S. R. Khafizova T. V. Tyumkina A. A. Yakovenko M. Yu. Antipin L. M. Khalilov R. V. Kunakova U. M. Dzhemileva 《Russian Chemical Bulletin》2006,55(2):312-316
The reaction of m-aminophenol with CH2O and H2S (1: 2: 1 ratio) afforded 2, 12-dioxa-4, 14-dithia-6, 16-diazatricyclo[15.3.1.17,11]docosa-1(20), 7(22), 8, 10, 17(21), 18-hexaene in ∼9% yield. Aminophenol o-and p-isomers react with CH2O and H2S (1: 3: 2) to form 2-and 4-[4H-1,3,5-dithiazin-5(6H)-yl]phenols in 86 and 71% yields, respectively. In the crystal structure of the latter, molecules contain dithiazine cycles
in the chair conformation with the axial hydroxyphenyl group. Molecular packing represents a combination of molecules forming
chains due to the OH...S intermolecular hydrogen bond.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 305–308, February, 2006. 相似文献
6.
Tolshchina S. G. Vyakhireva A. G. Ignatenko N. K. Ishmetova R. I. Ganebnykh I. N. Slepukhin P. A. Rusinov G. L. 《Russian Chemical Bulletin》2009,58(6):1281-1290
The intramolecular cyclization of (6-R-1,2,4,5-tetrazin-3-yl)hydrazones of ketones (R is 3,5-dimethylpyrazol-1-yl, 4-methylimidazol-1-yl, or 2-alkylidenehydrazino) giving rise to the previously unknown 3,7-dihydro-1,2,4-triazolo[4,3-b]-1,2,4,5-tetrazines, including spiro compounds, was studied. The reactivity and the yields of the reaction products depend on the structure of the alkylidene fragment and the nature of the substituent in the tetrazine ring.
相似文献7.
An improved method for obtaining optically pure (S)-(l-p-menthen-8-yl)amine ( 12 ) has led to expedient syntheses of two hypothetical biogenetic intermediates on the way to aistoteline ( 7 ), namely (S)-(N)-(l-p-menthen-8-yl)-2-(3-indolyl)ethylamine ( 3 ) and (S)-(N)-(l-p-menthen-8-yl)-2-(3-indolyl)ethylideneamine ( 4 ). The latter has been transformed into (?)-hobartine ( 6 ) in 64% yield via a stereoselective biomimetic cyclization by treatment with HCOOH. This unambiguous synthesis establishes the hitherto unknown absolute configuration of (?)-hobartin ( 6 ). Several model cyclization reactions of N-substituted α-(terpen-8-yl)imine derivatives yielding unsaturated 3azabicyclo [3.3.1]nonane compounds are described. 相似文献
8.
Krivopalov V. P. Bushuev M. B. Gatilov Yu. V. Shkurko O. P. 《Russian Chemical Bulletin》2010,59(9):1808-1816
The reactions of pyrimidine-2-carbonitrile and 4,6-dimethylpyrimidine-2-carbonitrile with hydrazine hydrate were investigated.
Intermediates in the route of successive transformations of pyrimidine-2-carbonitrile (pyrimidine-2-carbamidrazone and 1,2-bis[amino(pyrimidin-2-yl)methylidene]hydrazine)
into trinuclear heterocyclic compounds, viz., symmetrical di(pyrimidin-2-yl)-1,4-dihydro-1,2,4,5-tetrazines and di(pyrimidin-2-yl)-4H-1,2,4-triazol-4-amines (potential polydentate ligands), were isolated. The oxidative dehydrogenation of di(pyrimidin-2-yl)-1,4-dihydro-1,2,4,5-tetrazines
afforded the corresponding 3,6-di(pyrimidin-2-yl)-1,2,4,5-tetrazines. 相似文献
9.
V. R. Akhmetova R. R. Khairullina T. V. Tyumkina Yu. V. Nelyubina A. F. Smol’yakov I. S. Bushmarinov Z. A. Starikova M. F. Abdullin R. V. Kunakova 《Russian Chemical Bulletin》2010,59(2):425-433
The cyclothiomethylation of carboxylic acid hydrazides RCONHNH2 (R = C5H4N, Ph, 2-MeOC6H4, or 4-HOC6H4CH2) with formaldehyde and H2S at 70 °C affords predominantly the corresponding N-(1,3,5-dithiazinan-5-yl)amides, whereas this reaction at 0–−50 °C gives a mixture of the latter compounds with 3-acyl-1,3,4-thiadiazolidines.
N-(1,3,5-Dithiazinan-5-yl)-amides were selectively synthesized by the reaction of carboxylic acid hydrazides with formaldehyde
and H2S in the presence of BuONa in BuOH. 相似文献
10.
Kinga Wzgarda-Raj Justyna Dominikowska Sławomir Wojtulewski Agnieszka J. Rybarczyk-Pirek 《Acta Crystallographica. Section C, Structural Chemistry》2023,79(2):52-60
The results of the X-ray structure analysis of three novel 3,6-bis(pyridin-2-yl)-1,2,4,5-tetrazine cocrystals are presented. These are 3,6-bis(pyridin-2-yl)-1,2,4,5-tetrazine–2,4,6-tribromophenol (1/2), C12H8N6·2C6H3Br3O, 3,6-bis(pyridin-2-yl)-1,2,4,5-tetrazine–isonicotinic acid N-oxide (1/2), C12H8N6·2C6H5NO3, and 3,6-bis(pyridin-2-yl)-1,2,4,5-tetrazine–4-nitrobenzenesulfonamide (1/1), C12H8N6·C6H6N2O4S. Special attention is paid to a conformational analysis of the title tetrazine molecule in known crystal structures. Quantum chemistry methods are used to compare the energetic parameters of the investigated conformations. A structural analysis of the hydrogen and halogen bonds with acceptor aromatic tetrazine and pyrazine rings is conducted in order to elucidate factors responsible for conformational stability. 相似文献
11.
S. G. Pil’o V. M. Prokopenko V. S. Brovarets B. S. Drach 《Russian Journal of General Chemistry》2010,80(7):1345-1350
A convenient preparative procedure has been developed for the synthesis of previously unknown 2-aryl-5-arylsulfanyl-1,3-oxazole-4-carboxylic
acids and their functional derivatives from accessible multicenter substrates of the general formula Cl2C=C(NHCOR)C(O)OMe. The products turned out to be suitable for various subsequent transformations. Some oxazole-4-carboxylic
acid hydrazide derivatives containing a substituted oxazol-5-yl fragment at the N2 atom in the hydrazine moiety underwent recyclization on heating in acetic acid; as a result, one oxazole ring was converted
into 1,3,4-oxadiazole. 相似文献
12.
Yu Sui Yan-Gang Liu Jie Yin Jian Gao Zi-Kang Zhu De-Yin Huang Zong-Guang Wang 《Journal of polymer science. Part A, Polymer chemistry》1999,37(23):4330-4336
Side-chain second-order nonlinear optical polyimides were prepared from four novel chromophore-containing diamines and 4,4′-(hexafluoroisopropylidene) diphthalic anhydride by a traditional two-step process that included a solution polycondensation followed by a chemical imidization. The four diamines were 2,4-di-β-aminoethylamino-6-p-nitrophenylamino-1,3,5-triazine (M1), 4-nitro-4′-[N-(4,6-di-β-aminoethylamino)-1,3,5-triazin-2-yl]amino azobenzene (M2), 2,4-di-p-aminophenylamino-6-p-nitrophenylamino-1,3,5-triazine (M3), and 4-nitro-4′-[N-(4,6- di-4-aminophenylamino)-1,3,5-triazin-2-yl]amino azobenzene (M4). All the polyimides exhibited maximum ultraviolet-visible absorption peaks or shoulders of chromophores at wavelengths below 400 nm, and those based on M1 and M3 were transparent at wavelengths above 450 nm, whereas those based on M2 and M4 were transparent at wavelengths above 550 nm. The polyimides possessed high glass-transition temperatures (Tg's; 218–247 °C) and thermal decomposition temperatures. They were soluble in aprotic solvents such as N-methyl-2-pyrrolidone, N,N-dimethyl acetamide, N,N-dimethyl formamide, and dimethylsulfone. Some were even soluble in common low-boiling-point solvents such as tetrahydrofuran. © 1999 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 37: 4330–4336, 1999 相似文献
13.
G. R. Khabibullina V. R. Akhmetova R. V. Kunakova 《Russian Journal of General Chemistry》2014,84(4):693-699
Cyclothiomethylation of o-phenylenediamine with CH2O and H2S gives rise to 1,2,4,5-tetrahydrobenzo[d][1,3,6]thiadiazepine and 1,2,6,7-tetrahydrobenzo[f][1,3,5,8]dithiadiazonine, whereas m-phenylenediamine forms benzothiaza macroheterocycles of various structure, comprising 4–8 molecules of the starting diamine, formaldehyde, and hydrogen sulfide. 4,4′-Diaminodiphenyls give bis(1,3,5-dithiazinanes), along with oligomeric hetero(N,S,O)atomic compounds. 相似文献
14.
Abraham F. Jalbout Xin-Hua Li Mohammad R. Hassan G. M. Golzar Hossain 《Transition Metal Chemistry》2008,33(5):597-603
Three different types of metal-organic polymers have been prepared by a solution diffusion process carried out at room temperature.
Crystals of the copper coordination polymers [CuX(4,4′-bipy)]
n
(X = Cl, Br, I) have been obtained by the reaction of 4,4′-bipyridine ligands with Cu2X2 fragments to yield a three-dimensional network consisting of four interlocking planar lattices. Single crystals of [Cu2(1,2,4,5-BTC)(DMF)2]
n
(1,2,4,5-BTC = 1,2,4,5-benzene tetracarboxylate) have been grown by slow diffusion from solutions of a mixture of CuBr2, 2,2′-dithiosalicylic acid, and sodium azide plus a mixture of 1,2,4,5-H4BTC and 4-cyanopyridine. The complex [Co(1,3,5-BTC)(4,4′-bipy)]
n
(1,3,5-BTC = 1,3,5-benzene tricarboxylate) has a 3D open framework structure involving terminal cobalt atoms plus bridging
1,3,5-BTC and 4,4′-bipyridine ligands. 相似文献
15.
Hung‐Ju Yen Guey‐Sheng Liou 《Journal of polymer science. Part A, Polymer chemistry》2009,47(6):1584-1594
Two novel poly(amine‐hydrazide)s were prepared from the polycondensation reactions of the dicarboxylic acid, 9‐[N,N‐di(4‐carboxyphenyl)amino]anthracene ( 1 ), with terephthalic dihydrazide ( TPH ) and isophthalic dihydrazide ( IPH ) via the Yamazaki phosphorylation reaction, respectively. The poly(amine‐hydrazide)s were readily soluble in many common organic solvents and could be solution cast into transparent films. Differential scanning calorimetry (DSC) indicated that these hydrazide polymers had glass‐transition temperatures (Tg) in the range of 182–230 °C and could be thermally cyclodehydrated into the corresponding oxadiazole polymers in the range of 300–400 °C. The resulting poly(amine‐1,3,4‐oxadiazole)s had useful levels of thermal stability associated with high Tg (263–318 °C), 10% weight‐loss temperatures in excess of 500 °C, and char yield at 800 °C in nitrogen higher than 55%. These organo‐soluble anthrylamine‐based poly(amine‐hydrazide)s and poly (amine‐1,3,4‐oxadiazole)s exhibited maximum UV‐vis absorption at 346–349 and 379–388 nm in N‐methyl‐2‐pyrrolidone (NMP) solution, respectively. Their photoluminescence spectra in NMP solution showed maximum bands around 490–497 nm in the green region. The poly(amine‐hydrazide) I ‐ IPH showed a green photoluminescence at 490 nm with PL quantum yield of 29.9% and 17.0% in NMP solution and film state, respectively. The anthrylamine‐based poly(amine‐1,3,4‐oxadiazole)s revealed a electrochromic characteristics with changing color from the pale yellow neutral form to the red reduced form when scanning potentials negatively from 0.00 to ?2.20 V. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 1584–1594, 2009 相似文献
16.
Sun Min’yan’ S. M. Ramsh V. S. Fundamenskii S. Yu. Solov’eva V. I. Zakharov 《Russian Journal of General Chemistry》2010,80(3):511-517
3-tert-Butyl-6-(methylsulfanyl)-1,2,3,4-tetrahydro-1,3,5-triazine hydroiodide enters into the amine exchange reaction with glycine
and β-alanine in aqueous solution. The final exchange products are [4-(methylsulfanyl)-5,6-dihydro-1,3,5-triazin-3-ium-1(2H)-yl] acetate and 3-[4-(methylsulfanyl)-5, 6-dihydro-1,3,5-triazin-3-ium-1(2H)-yl] propanoate, respectively, crystallizing together with t-butylamine hydroiodide from aqueous or aqueous alcoholic solutions as ion associates, which also can be detected in solution
in DMSO-d
6. [4-(Methylsulfanyl)-5,6-dihydro-1,3,5-triazin-3-ium-1(2H)-yl] acetate can be extracted directly from the reaction mixture after carrying out the amine exchange in aqueous isopropanol
or 95% ethanol, as well as by “recrystallization“ of its associate with tert-butylamine hydroiodide from aqueous isopropanol. 相似文献
17.
Two phenanthroline derivatives containing a hole transporting triphenylamine and an electron transporting 1,3,4-oxadiazole unit have been prepared with high yield. UV-vis absorption and fluorescence measurement indicated they are high efficient light-emitting materials. The compounds are 6-(5-(4-N,N′-diphenylaminophenyl)-1,3,4-oxadiazol-2-yl) quinoxalino[2,3-f] phenanthroline (9, λmax = 635 nm, 40% quantum yield), and 1-ethyl-2-(4-(5-(4-N,N′-diphenylaminophenyl)-1,3,4-oxadiazol-2-yl)phenyl)imidazo[4,5-f]phenanthroline (14, λmax = 461 nm, 78% quantum yield). Preliminary study on electroluminescence for the two fluorescent dyes prepared from vacuum evaporation resulted in blue and red light emitting organic light emitting diodes (OLED). 相似文献
18.
The aroylhydrazones of ethyl benzoate have been prepared in fair yield by the action of aroylhydrazines on ethyl benzimidate hydrochloride. These products give rise, quantitatively, at their melting point, to 5-aryl-2-phenyl-1,3,4-oxadiazoles, and, in the presence of hydrazine hydrate, in boiling 1-propanol to 4-amino-5-aryl-3-phenyl(4H)-1,2,4-triazoles (Yields 50%). The addition of methylmagnesium iodide to these products give aroylhydrazones of acetophenone. 相似文献
19.
Akhmetova V. R. Nadyrgulova G. R. Murzakova N. N. Starikova Z. A. Antipin M. Yu. Kunakova R. V. 《Russian Chemical Bulletin》2009,58(5):1091-1093
Hydrazine is regioselectively condensed with a mixture of acetaldehyde and H2S at a temperature below −10 °C to form 2,4,6,8-tetramethyl-3,7-dithia-1,5-diazabicyclo[3.3.0]-octane. The reaction at 0 °C
with the reverse order of mixing of the starting reagents affords 2,4,6-trimethyl(1,3,5-dithiazinan-5-yl)amine as the major
product. 相似文献
20.
An approach is proposed to modification of a medical product acetazolamide (N-(5-sulfamoyl-1,3,4-thiadiazol-2-yl)acetamide) by interaction of 2-(5-acetylamino-1,3,4-thiadiazole-2-yl)sulfonyl imine methyl trifluoropyruvate, which is in-situ generated from acetazolamide, with 1,3-binucleophiles: 6-aminouracils, 6-aminothiouracils, and N-substituted ureas, to yield heterocyclic compounds with the CF3 substituent in the nitrogen-containing mono- or bicycle. 相似文献