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Markosyan A. I. Ayvazyan A. S. Gabrielyan S. H. Mamyan S. S. 《Russian Journal of Organic Chemistry》2022,58(2):200-208
Russian Journal of Organic Chemistry - Starting from 3-(2,2-dimethyltetrahydro-2H-pyran-4-yl)-2-thioxo-2,3-dihydro-1H-spiro(benzo[h]quinazoline-5,1'-cycloheptan)-4(6H)-one, a series of... 相似文献
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A.?I.?MarkosyanEmail author K.?K.?Hayrapetyan S.?H.?Gabrielyan V.?Z.?Shirinyan S.?S.?Mamyan J.?A.?Avakimyan G.?M.?Stepanyan 《Russian Journal of Organic Chemistry》2018,54(4):606-613
The condensation of 1-amino-3,3-dimethyl-3,4-dihydronaphthalene-2-carbonitrile with chloroacetyl chloride afforded chloro-N-(2-cyano-3,3-dimethyl-3,4-dihydronaphthalen-1-yl)acetamide which underwent cyclization to 2-(chloromethyl)-5,5-dimethyl-5,6-dihydrobenzo[h]quinazolin-4(3H)-one. The latter reacted with various nucleophiles (alkali metal alkoxides, piperazine, 2-sulfanylethanol) to give 2-(alkoxymethyl)-, 2-(piperazin-1-ylmethyl)-, and 2-{[(2-hydroxyethyl)sulfanyl]methyl}-5,5-dimethyl-5,6-dihydrobenzo[h]quinazolin- 4(3H)-ones. The condensation of 2-(chloromethyl)benzo[h]quinazoline with 2-thioxo derivatives of quinazoline and benzo[h]quinazolines led to the formation of bis-quinazolines in which 5,5-dimethyl-5,6- dihydrobenzo[h]quinazolin-4(3H)-one fragment is linked to quinazoline or benzo[h]quinazoline system through a CH2S bridge. 相似文献
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Ervand G. Paronikyan Shushanik Sh. Dashyan Suren S. Mamyan Armen G. Ayvazyan 《Journal of heterocyclic chemistry》2021,58(10):1936-1942
New and effective methods for the synthesis of derivatives of pyrano[3,4-c][1,2,4]triazolo[4,3-a][1,5-a]pyridines were developed. Synthesized new tetracyclic heterocyclic systems containing pyrano[3,4-c]pyridine ring unknown in the literature were obtained for the first time. The rearrangement of Dimroth in the triazolo[4,3-a]pyridine systems for the first time was studied. The possibility of rearrangement of Dimroth in the new heterocyclic system has been investigated. 相似文献
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A. P. Hyengoyan S. S. Mamyan T. A. Gomktsyan E. N. Hambardzumyan A. S. Vorskanyan K. A. Eliazyan V. A. Pivazyan V. V. Dovlatyan 《Chemistry of Heterocyclic Compounds》2005,41(8):1059-1061
We have studied the temperature dependence of the 1H NMR spectra of some 2,4,6-trisubstituted 1,3,5-triazines having an NHAlk or NAlk2 group or groups at the position 2 or 2 and 4 of the heterocycle. We have shown that rotation of these groups about the C-N
bond is hindered. We have calculated the free energies of activation for the rotation processes.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1236–1239, August, 2005. 相似文献
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Paronikyan E. G. Dashyan Sh. Sh. Mamyan S. S. Tamazyan R. A. Ayvazyan A. G. 《Russian Journal of Organic Chemistry》2019,55(9):1351-1362
Russian Journal of Organic Chemistry - —A procedure was developed for the synthesis of 1-hydrazinyl-3-arylamino-5,6,7,8-tetrahydroisoquinoline- 4-carbonitriles via recyclization of the... 相似文献
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V. A. Smit S. O. Simonyan V. A. Tarasov A. S. Gybin G. S. Mikaélyan A. S. Shashkov S. S. Mamyan I. I. Ibragimov R. Kéipl 《Russian Chemical Bulletin》1988,37(12):2526-2535
1. | The intramolecular Khand-Pauson reaction is substantially accelerated when it is carried out on the surface of a Chromatographic adsorbent in the absence of a solvent. |
2. | A method has been developed for the preparation of substituted 3-oxabicyclo[3.3.0]-oct-5-en-7-ones, by cyclization of the dicobalt hexacarbonyl complexes of allyl propargyl ethers. |
3. | A novel cyclization reaction of dicobalt hexacarbonyl complexes has been found, which provides a convenient synthetic route to 4-hydroxymethylcyclopent-2-en-1-ones. |