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A. F. Shidlovskii A. S. Peregudov B. B. Averkiev M. Yu. Antipin N. D. Chkanikov 《Russian Chemical Bulletin》2004,53(9):2060-2070
The reactions of 2-chloro-1-cyano-1-diethoxyphosphoryl-2-trifluoromethylethylene (2a) and 2-chloro-2-chlorodifluoromethyl-1-cyano-1-diethoxyphosphorylethylene (2b) with arylamines, arylhydrazines, amidines, 2-aminopyridines, and 5-aminopyrazoles were studied. Alkenes 2a, b can serve as precursors of aminopyrazoles, pyrimidines, pyrido[1,2-a]pyrimidines, and pyrazolo[1,5-a]pyrimidines modified with the fluoroalkyl and diethoxyphosphoryl groups. Intermediates of some heterocyclization reactions were detected by NMR spectroscopy. The structures of the compounds were confirmed by X ray diffraction analysis.Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1977–1986, September, 2004. 相似文献
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The autoionization widths of levels 1s 2s 2pjJ, 1s2s2 2S1/2, and 1s2pj2pj′ J have been calculated for ions with Z = 6–30. The calculation has been carried out in intermediate coupling. The decay amplitudes have been calculated in a relativistic approximation. 相似文献
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以氯甲烷(2)为原料制备甲基氯化镁格氏试剂;以三氯化镓为催化剂,甲基氯化镁与1,1,1-三氟丙酮(3)反应,经水解制得1,1,1-三氟-2-甲基-2-丙醇(1).产物结构经1 H-NMR、13 C-NMR、19 F-NMR及MS表征;通过单因素、正交实验和放大重复性实验确定了最佳反应条件:溶剂为正丁醚、格氏试剂浓度3 ... 相似文献
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Norbert De Kimpe Laurent De Buyck Roland Verhé Freddy Wychuyse Niceas Schamp 《合成通讯》2013,43(7):575-582
Recently1 we described a convenient synthesis of 1-aryl-2, 2-dichloro-1-alkanones 1 by a reaction sequence involving conversion of the parent alkylarylketones into the corresponding N-cyclohexylketimines, followed by chlorination with N-chlorosuccinimide in carbon tetrachloride to afford N-cyclo-hexyl α,α-dichloroketimines, the latter compounds being hydrolyzed in acidic medium to yield the title compounds 1. The relative inaccessibility of compounds of type 1 in the literature was striking. α,α-Dichloroacetophenones 1 (R=H) are 相似文献
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N. I. Tyun'kina V. N. Sosnovskaya S. D. Pirozhkov A. L. Liberman 《Russian Chemical Bulletin》1973,22(1):148-149
Conclusions 2,2-Dimethyl-1-p-tolyl-1-hydroxypropane and 2,2-dimethyl-1-p-tolyl-1-oxopropane were obtained for the first time.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 149–150, January, 1973. 相似文献
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A series of new 1-(2-arylvinyl)-2-azolyl-1-pyridylethanols-1 has been obtained with various positions of the nitrogen atom
in the pyridine fragment and with substituents in the benzene ring, by the reaction of (2-arylvinyloxiran-2-yl)pyridines with
triazole and imidazole, for agrochemical screening. The compounds mentioned displayed high fungicidal activity.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1167–1174, August, 2007. 相似文献
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The vibrational structure of the 2B1 ← 2A1 system of NO2 has been assigned to a progression in ν′2. Vibrational analyses for three isotopic species have been made using a hamiltonian which allows explicitly for a large-amplitude bending vibration. The system origin for the normal isotopic species has been assigned an extrapolated value of 14743.5 cm?1. The bending potential function is expressed as a rapidly converging Taylor series expansion about the linear configuration. There is no evidence that the equilibrium configuration is nonlinear. 相似文献
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W. Adam J. Halász Z. Jámbor A. Lévai C. Nemes T. Patonay G. Tóth 《Monatshefte für Chemie / Chemical Monthly》1996,127(6-7):683-690
Summary Oxidation of the (E) and (Z) isomers of 2-arylidene-1-indanones (1) and 2-arylidene-1-benzosuberones (4) by alkaline hydrogen peroxide (methodi) afforded the spiroepoxidestrans-2a–g andtrans-5a–g from both isomers as sole products in high yields. On the other hand, dimethyldioxirane epoxidation(methodii) of the (E) isomers1a–g and4a–g gave the correspondingtrans spiroepoxides in good yields, whereas the (Z) isomers1a,c,e and4a,c,e led to thecis spiroepoxides in moderate yields. Dimethyldioxirane oxidation (methodii) of (Z)-1c and (Z)-4c,e gave diones3c and6c,e as by-products as well. Epoxidation of (Z)-1a,c,e and (Z)-4a,c,e bym-chloroperoxybenzoic acid (methodiii) resulted inca. 6:1 mixtures ofcis-2a,c,e andtrans-2a,c,e orcis-5a,c,e andtrans-5a,c,e spiroepoxides.Dedicated to Prof.W. Fleischhacker on the occasion of his 65th birthday 相似文献
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Jürgen Liebscher Ahmed Hassoun Jürgen Fabian 《Monatshefte für Chemie / Chemical Monthly》1989,120(8-9):749-758
Summary 1-Amino-2-methylthiopyrimidinium iodides3 have been synthesized by reaction of 3-isothiocyanato-2-propeniminium perchlorates1 with hydrazines and subsequent methylation of the resulting 1-amino-2(1H)-pyrimidinthiones2. Reaction of3 with hydrazine causes substitution of the methylthio group and results in the formation of deeply coloured 1-amino-2-hydrazinopyrimidin-N-ylides5 as unusual tautomers of the commonly expected 1-amino-2(1H)-pyrimidinhydrazones4. The structure of these N-ylides has been proved by spectroscopic methods as well as by subsequent transformation to 3-amino-1,2,4-triazolo[2,3-a]pyrimidinium salts9 by dehydration or to pyrimidotriazinium salt10 c by oxidation. Reaction of N,N-disubstituted 1-amino-2-methylthiopyrimidinium salt7 a with hydrazine also causes substitution of methylthiol, the resulting orange N,N-disubstituted 1-amino-2(1H)-pyrimidinhydrazone8 a, however, cannot tautomerize to N-ylides.
1-Amino-2-hydrazinopyrimidin-N-ylide. Ungewöhnliche Tautomere von 1-Aminopyrimidin-2-hydrazonen
Zusammenfassung Es wurden 1-Amino-2-methylthiopyrimidiniumjodide3 ausgehend von 3-Isothiocyanato-2-propeniminiumperchloraten1 und Hydrazinen durch Methylierung der primär gebildeten 1-Amino-2(1H)-pyrimidinthione2 hergestellt. Die Reaktion dieser Pyrimidiniumsalze3 mit Hydrazin verläuft unter Substitution der Methylthiogruppe unter Bildung violett gefärbter 1-Amino-2-hydrazinopyrimidin-N-ylide5 als ungewöhnliche Tautomere der allgemein erwarteten 1-Amino-2(1H)-pyrimidinhydrazone4. Die Struktur dieser Ylide5 wird durch spektroskopische Methoden sowie durch nachfolgende Dehydratisierung zu 3-Amino-1,2,4-triazolo[2,3-a]pyrimidiniumsalzen9 bzw. Oxydation zum Pyrimidotriaziniumsalz10 c bewiesen. Die Reaktion des N,N-disubstituierten 1-Amino-2-methylthiopyrimidiniumsalzes7 a mit Hydrazin verläuft ebenfalls unter Substitution der Methylthiogruppe. Jedoch kann das gebildete orange gefärbte, N,N-disubstituierte 1-Amino-2(1H)-pyrimidinhydrazon8 a nicht zu einem N-Ylid tautomerisieren.相似文献
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Zusammenfassung Durch Kondensation von -Azidoacetophenonen mit aliphatischen Aldehyden wurden 1-Aryl-2-azido-2-alken-1-one erhalten. Die Thermolyse dieser Verbindungen gab Azirine, die sich mit Cyclopentadien in 2-Azatricyclo[3.2.1.02.4]-6-octene überführen lassen.
Synthesis of 1-aryl-2-azido-2-alken-1-ones (ene-azides, V)
1-Aryl-2-azido-2-alken-1-ones were obtained by condensing -azidoacetophenones with aliphatic aldehydes. Thermolysis of these compounds gave azirines, which can be converted to 2-azatricyclo[3.2.1.02.4]-6-octenes by reaction with cyclopentadiene.相似文献
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A. M. Churakov A. Yu. Tyurin E. L. Goncharova S. L. Ioffe Yu. A. Strelenko V. A. Tartakovsky 《Russian Chemical Bulletin》1995,44(5):890-896
The addition of 1-aryl-2-bromodiazene 1-oxides to olefins yields 1-aryl-2-(2-bromoalkyl)diazene 1-oxides (4). A radical mechanism of the reaction has been suggested. Compounds4 decompose to give bromohydrazones of formaldehyde and aldehydes. The structural factors that affect the rate of this process are discussed.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 917–923, May, 1995.The work was carried out in the Scientific Educational Center of the Institute of Organic Chemistry of the RAS with financial support of the Russian Foundation for Basic Research (Project No. 93-03-18461). 相似文献
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A. M. Churakov A. Yu. Tyurin E. L. Goncharova S. L. Ioffe Yu. A. Strelenko V. A. Tartakovsky 《Russian Chemical Bulletin》1995,44(5):897-900
1-Aryl-2-alkenyldiazene 1-oxides were prepared by the reactions of 1-aryl-2-bromodiazene 1-oxides with olefins followed by dehydrobromination of the intermediate 1-aryl-2-(-bromoalkyl)diazene 1-oxides by triethylamine.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 924–927, May, 1995.This work was carried out at the Scientific Educational Center of the Institute of Organic Chemistry of the RAS with financial support of the Russian Foundation for Basic Research (Project No. 93-03-18461). 相似文献
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AbstractMethyl-2-(3-oxo-3-aryl) benzoates derived from acid catalyzed air oxidative fragmentation of 2-aryl-1-tetralones were efficiently undergone intramolecular-Claisen condensation in the presence of potassium tertiary butoxide. The resulting 2-benzoyl-1-indanones formed in two-step ring contractions were further subjected to indium triflate mediated retro-Claisen condensation to get 1-indanones. 相似文献
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DanMeiDAI YouChengLIU JingLI PeiWANG XuDongCHEN ThomasC.W.MAK 《中国化学快报》2004,15(3):353-356
1,1-Di-p-methoxyphenyl-2, 2-dinitroethylene reacts with 1-benzyl-1, 4-dihydronicotinamide (BNAH) in deaerated acetonitrile to give 1,1-di-p-methoxyphenyl-2, 2-dinitroethane,while 1,1-di-O-methoxyphenyl-2, 2-dinitroethylene fails to react with BNAH under the same conditions, which provides evidence for a concerted electron-hydrogen atom transfer mechanism. 相似文献