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1.
Donato Pocar Luisa Maria Rossi Pasqualina Trimarco 《Journal of heterocyclic chemistry》1980,17(2):267-270
The cycloaddition of arylazides to 1-methyl- and 1-benzyl-2,5-dihydropyrrole affords pyrrolo[3,4-d]-v-triazole derivatives which react with methyl iodide, yielding the corresponding quaternary ammonium salts. On base-catalyzed elimination 1-aryl-5-dialkyl-aminomethyl-4-methylene-4,5-dihydro-v-triazoles are formed. Their structure and behaviour toward methoxide and secondary amines are discussed. 相似文献
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Braulio Insuasty Jairo Quiroga Juan Carlos Argoti Samuel Gmez Roberto Martínez Enrique Angeles Rubn Gabio Manuel Nogueras Adolfo Snchez 《Journal of heterocyclic chemistry》1998,35(6):1397-1399
The reaction of 1-aryl-3-(dimethylamino)-1-propanones 1 with one equivalent of 4,5-diamino-1H-pyrimidin-6-ones 2 , in acidic medium, leads to the formation of 4-aryl-2,3,6,7-tetrahydro-1H-pyrimido[4,5-b]-[1,4]diazepin-6-ones 3 . The structure elucidation of the products is based on detail nmr analysis of experiments such as 13C, 1H and DEPT including selective 13C{1H} decoupling experiments. 相似文献
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P. V. Pasternak V. I. Dyachenko Z. A. Starikova A. S. Peregudov M. Yu. Antipin N. D. Chkanikov 《Russian Chemical Bulletin》2006,55(7):1307-1308
Heating of 2-amino-1-aryl-1,4-dihydropyridines in acidic aqueous media gives 2-arylamino-1,4-dihydropyridines. The reaction
formally involves the migration of the aryl substituent from the endo-to exocyclic N atom.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1259–1260, July, 2006. 相似文献
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The cycloaddition reaction of some arylazides to enamines 4a-f afforded v-triazolines 5a-i ; by subsequent acid-catalyzed hydrolysis v-triazoles 6a-c were obtained. The reversibility of the cycloaddition was demonstrated on the basis of spectroscopic or chemical evidences. 相似文献
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Richard F. Smith Lisa A. Dennis William J. Ryan 《Journal of heterocyclic chemistry》1988,25(2):415-417
1-Methyl-2-(2-propenyl)-3-pyrazolidinimine ( 5 ) was obtained by treatment of 3-amino-4,5-dihydro-1-methyl- 1-(2-propenyl)-1H-pyrazolium bromide ( 4 ) with ethanolic sodium ethoxide. Similar treatment of the analogous 2-(2-butenyl) and 2-(3-phenyl-2-propenyl)-substituted salts 12 and 15 gave 1-methyl-2-(1-methyl-2-propenyl)-3- pyrazolidinimine ( 13 ) and 1-methyl-2-(1-phenyl-1-propenyl)-3-pyrazolidinimine ( 16 ) respectively. 相似文献
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V. D. Orlov Kh. Kiroga A. Marrugo N. N. Kolos S. V. Iksanova 《Chemistry of Heterocyclic Compounds》1987,23(11):1254-1259
The reaction of 4,5-diamino-3-methyl-1-phenylpyrazole with dibenzylideneacetone and its 4,4-derivatives has been studied; the reactions lead to aromatic 1H-2,3-dihydropyrazolo[5,4-b]1,5-diazepine derivatives. The reaction pathway has also been identified.Translated from Khimiya Geterotsiklicheskikh Sodinenii, No. 11, pp. 1563–1567, November, 1987. 相似文献
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V. D. Orlov M. Tuéni N. N. Kolos N. V. Getmanskii Kh. Kiroga 《Chemistry of Heterocyclic Compounds》1988,24(6):643-646
Reaction of 4,5-diamino-3-methyl-1-phenylpyrazole with -bromoacetophenones yields pyrazolo[4,5-b]pyrazines. A side product is 1-phenyl-3-methyl-5-imino-4-[(1-phenyl-3-methyl-4-aminopyrazol-5-yl)imino]-2-pyrazoline obtained by dimerization of the starting diaminopyrazole with loss of ammonia and a molecule of hydrogen.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 787–790, June, 1988. 相似文献
10.
Luisa Citerio Elisabetta Rivera Maria Luisa Saccarello Riccardo Stradi Bruno Gioia 《Journal of heterocyclic chemistry》1980,17(1):97-101
Diimmonium salt (5) reacts with guanidines (6) and o-methylisoureas (7) affording 2-amino-4,5-dimorpholinoimidazolines (9) . 1-Aryl-2-amino-4,5-dimorpholinoimidazolines lose the amino functionality under mild acidic conditions with formation of 2-amino-5-morpholinoimidazole derivatives (10) whereas 1-acyl derivatives undergo under the same conditions a ring expansion process leading to pyrimidine derivatives (13) . 相似文献
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V. I. Erashko B. S. Él'yanova A. T. Baryshnikov N. I. Zubanova A. A. Tishaninova 《Russian Chemical Bulletin》1985,34(11):2440-2441
Conclusions A modified scheme was proposed for the synthesis of 1-benzyl-4, 5-diamino-1,2,3-triazole involving the use of high pressure (5–6 kbar) which permits a significant increase in the yield of this product.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2633–2634, November, 1985. 相似文献
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A. N. Grinev G. Ya. Uretskaya N. V. Arkhangel'skaya S. Yu. Ryabova T. F. Vlasova 《Chemistry of Heterocyclic Compounds》1974,10(10):1207-1209
1-Aryl-2-methyl-3-carbethoxy-5-hydroxy-6-bromoindoles are oxidized by nitric acid to 1-aryl-2-methyl-3-carbethoxy-4,5-dioxo-6-bromoindoles, while 1,2-dimethyl-3-carbethoxy-5-hydroxy-6-bromoindole is converted to the 4,6-dinitro derivative under similar conditions. 相似文献
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Donato Pocar Luisa Maria Rossi Pasqualina Trimarco Luciano Vago 《Journal of heterocyclic chemistry》1980,17(5):881-885
5-Amino-4-aminomethyl-3-aryl-4,5-dihydroisoxazoles 2 were obtained by cycloaddition of nitrile oxides to 1,3-diaminopropenes 1. On reaction with methyl iodide the corresponding 4-(quaternary)-ammoniomethyl iodides 3 were formed. These compounds, on reaction with bases, afforded 5-amino-3-aryl-4-methylene-4,5-dihydroisoxazoles 4. The acid-catalyzed deamination of compounds 2 afforded 4-aminomethyl-3-arylisoxa-zoles 5 and 3-arylisoxazoles as retro-Mannich products. The deamination of 2 to yield 5 was also obtained by base catalysis. 相似文献
17.
P. S. Silaichev V. O. Filimonov A. N. Maslivets 《Russian Journal of Organic Chemistry》2014,50(3):406-411
Methyl 1-aryl-3-cinnamoyl-4,5-dioxo-4,5-dihydro-1H-pyrrole-2-carbocylates react with N-substituted ethyl 3-amino-3-phenylprop-2-enoates, ethyl 3-aminobut-2-enoates, 3-amino-1,3-diphenylprop-2-en-1-ones, and dimethyl 2-arylaminofumarates to give 9-ethoxycarbonyl-, 9-benzoyl-, and 8,9-bis(methoxycarbonyl)-4-cinnamoyl-1,7-diazaspiro[4.4]nona-3,8-dienes. 相似文献
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