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2,3-Allenols were prepared conveniently from the reduction reaction of 2,3-allenoates with DIBAL-H(Diisobutylaluminum hydride) in toluene.A dramatic solvent effect was observed for this reaction. 相似文献
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Y. A. Ammar A. G. Al-Sehemi A. M. Sh. El-Sharief M. S. A. El-Gaby 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3):660-698
This review describes the synthesis, reactivity, and the utility of 2,3-dichloroquinoxalines as synthetic intermediates for the synthesis of condensed heterocycles with pharmacological interest. 相似文献
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Z. G. Aliev A. N. Maslivets O. L. Simonchik T. G. Konyukhova Yu. S. Andreichikov L. O. Atovmyan 《Russian Chemical Bulletin》1995,44(8):1496-1498
1-Unsubstituted 4,5-diphenyl-2,3-dihydro-2,3-pyrroledione interacts with ethoxycarbonyl-methylenetriphenylphosphorane regioselectively to give 4,5-diphenyl-Z-2-ethoxycarbonyl-methylene-2,3-dihydro-3-pyrrolone. The crystal and molecular structure of the latter was studied by X-ray analysis.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1556–1558, August, 1995. 相似文献
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Jeffrey T. Kuethe 《Tetrahedron》2019,75(34):130446
A strategy for the efficient and rapid one-pot synthesis of 2-aryl-2,3-dihydrofuro[3,2-b], [3,2-c], and [2,3-b]pyridines from readily available o-nitropicolines and aromatic aldehydes is described. The key transformation involves reaction of o-nitropicolines with aromatic aldehydes in the presence of TBAF and Hünig's base giving rise to functionalized products having molecular complexity suitable for further manipulation. 相似文献
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The nitration of 2,3'-biquinolyls in concentrated sulfuric acid with an equivalent amount of nitric acid at room temperature takes place exclusively at the 2-quinolyl fragment with the formation of the 5- and 8-nitro derivatives or their mixtures. The nitration of the 1',4'-dihydro derivatives under these conditions leads to analogous compounds. Reduction of the nitrobiquinolyls gives the respective amines. Acylation of the latter leads to acylamino-2,3'-biquinolyls. 相似文献
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M. A. Del Valle E. T. Silva F. R. Diaz M. E. Bodini L. Gargallo 《Journal of polymer science. Part A, Polymer chemistry》2000,38(9):1698-1703
The optima conditions to electrosynthesize poly(2,3‐diaminophenol) by electro‐oxidation of the monomer were determined, and the electrodeposits obtained characterized by electrochemical methods, UV‐vis, FTIR, conductivity and viscosity measurements. The influence of parameters such as electrolytical medium and electrochemical conditions on the electro‐oxidation of 2,3‐diaminophenol were also investigated. It has been established that appropriate deposits are obtained only when very anhydrous acetonitrile is used as solvent. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 38: 1698–1703, 2000 相似文献
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Ikuko Ueda 《Tetrahedron letters》2006,47(48):8535-8537
Reaction of 2,3-dibromo-1-methylindole with tert-butyllithium at −78 °C followed by treatment with tropylium ion gave 2-bromo-3-cycloheptatrienyl-1-methylindole in a moderate yield, indicating that 2-bromo-3-lithio-1-methylindole would be involved as an intermediate instead of 3-bromo-2-lithio-1-methylindole. The structure of 2-bromo-3-cycloheptatrienyl-1-methylindole was unequivocally determined by a single X-ray analysis. 2,3-Diiodo-1-methylindole also gave a 3-lithio derivative exclusively. 相似文献
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2,3-Benzodiazepine-1-thione in the synthesis of substituted and hetero-annelated 2,3-benzodiazepines
A series of S-substituted and 1,2-annelated derivatives of 2,3-benzodiazepine has been obtained on the basis of 2,3-benzodiazepine-1-thione.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, 594-601, April, 2009. 相似文献
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D. D. Nekrasov 《Chemistry of Heterocyclic Compounds》2001,37(3):263-275
The biological activity of nitrogen-containing heterocycles obtained by the decyclization or recyclization of 5-aryl-2,3-dihydrofuran-2,3-diones under the action of functionalized amines and diamines has been considered. 相似文献
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2,3‐Dimethylpentacene (DMP) and 2,3‐dimethyltetracene (DMT) were synthesized, characterized and employed as the channel material in the fabrication of thin‐film transistors. The two methyl groups increase the chemical stability of the compounds versus the pristine acene analogues. The crystals maintain herringbone‐like molecular packing, whereas the weak dipole associated with the unsymmetrical molecule induces an anti‐parallel alignment among the neighbors. This structural motif favors layered film growth on SiO2/Si surface. Thin film transistors prepared on SiO2/Si and n‐nonyltrichlorosilane‐modified SiO2/Si at different substrate temperatures were compared. DMP‐based transistors prepared on rubbed n‐nonyltrichlorosilane‐modified SiO2/Si substrate gave the highest field‐effect mobility of 0.46 cm2/Vs, whereas DMT‐based transistor gave a mobility of 0.028 cm2/Vs. 相似文献
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Z. G. Aliev N. Yu. Lisovenko L. O. Atovmyan A. N. Maslivetz 《Journal of Structural Chemistry》2004,45(3):527-531
The interaction of 5-aryl-4-quinoxaline-2,3-dihydro-2,3-furandiones with mesitylamine and methyl(phenyl) hydrazine results in the formation of 1-substituted 5-aryl-4-quinoxalinyl-2,3-dihydro-2,3-pyrrolediones. The crystal and molecular structure of the 1-mesityl-5-phenyl derivative was investigated by X-ray diffraction.Original Russian Text Copyright © 2004 by Z. G. Aliev, N. Yu. Lisovenko, L. O. Atovmyan, and A. N. MaslivetzTranslated from Zhurnal Strukturnoi Khimii, Vol. 45, No. 3, pp. 553–557, May–June 2004. 相似文献
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Summary Furan-2,3-dione1 reacts with arylisocyanates to the corresponding pyrrol-2,3-diones2, whereas conversion with diisopropylcarbodiimide affords the oxazepin-6,7-dione derivative3 in 68% yield. 1,3-Oxazines5,6, and7 were obtained by thermolysis of1 in boiling xylene in presence of arylisocyanates, diphenylketen-p-tolylimine, andSchiff bases, most likely by trapping the -oxoketene intermediate4. Preparative flash vakuum pyrolysis (FVP) of1 and2b gave8 and9, respectively.
Reaktionen cyclischer Oxalylverbindungen, 39. Mitt. Umsetzungen von 4-Ethoxycarbonyl-5-phenylfuran-2,3-dion mit Heterocumulenen undSchiffschen Basen
Zusammenfassung Das Furan-2,3-dion1 reagiert mit Arylisocyanaten zu den entsprechenden Pyrrol-2,3-dionen, wohingegen mit Diisopropylcarbodiimid das 1,3-Oxazepinderivat3 in 68%iger Ausbeute gebildet wird. Die 1,3-Oxanzine5,6 und7 werden durch Thermolyse von1 in siedendem Xylol in Gegenwart von Arylisocyanaten, Diphenylketen-p-tolylimin undSchiffschen Basen erhalten, offensichtlich durch Abfangen des intermediär gebildeten -Oxoketens4. Präparative Flash-Vakuum-Pyrolyse (FVP) von1 bzw.2b ergaben8 bzw.9.相似文献
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Said M. Bayomi 《中国化学会会志》1992,39(1):101-104
A convenient route is reported for the synthesis of fused pyrrolo[2,3-d][1,3]oxazine and pyrrolo[2,3-d]-pyrimidine derivatives from 2-amino-1-benzyl-3-t-butoxycarbonyl]-4,5-dimethylpyrrole. 相似文献