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https://ea.donntu.edu.ua/jspui/handle/123456789/18404
Повний запис метаданих
Поле DC | Значення | Мова |
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dc.contributor.author | Ересько, Александр Борисович | - |
dc.contributor.author | Толкунов, Валерий Сергеевич | - |
dc.contributor.author | Толкунов, Сергей Владимирович | - |
dc.date.accessioned | 2013-04-11T15:37:44Z | - |
dc.date.available | 2013-04-11T15:37:44Z | - |
dc.date.issued | 2013 | - |
dc.identifier.issn | 2074-6652 | - |
dc.identifier.other | УДК 547.735’83+547.728.1’83+547.735’89 | - |
dc.identifier.uri | http://ea.donntu.edu.ua/handle/123456789/18404 | - |
dc.description.abstract | Синтезирована серия неизвестных ранее 1,2,3,4-тетрагидробензотиено[2,3-с]пири-динов, 1,2,3,4-тетрагидробензофуро[2,3-с]пиридинов, 2,3,4,5-тетрагидро-1H-[1]бензотиено[2,3-c]азе-пинов с использованием реакций Эшвайлера-Кларка и Пикте-Шпенглера. | en_US |
dc.description.sponsorship | The Eschweiler-Clarke reaction is commonly used for methylation of primary or secondary amines by the action of formaldehyde in the presence of formic acid. This reaction can be used for obtaining of 2-methyltetrahydropyridines as well as azepines. The 1-R-1,2,3,4-tetrahydrobenzothieno[2,3-c]pyridines and 7-methyl-1-R-1,2,3,4-tetrahydrobenzofuro[2,3-c]pyridines obtained by Pictet-Spengler reaction was used as the starting products for the synthesis of 2-methylderivatives by the Eschweiler-Clarke reaction. A different behavior of initial 2-(1-hetaryl-3)ethylamine by Pictet-Spengler reaction was found. The reaction proceeds well in the series of benzofuranes. Under similar conditions, [2-(1-benzothien-3-yl)ethyl]amine reacts with benzaldehyde to form by-products – aminoacetales. Interaction of [2-(1-benzothien-3-yl)ethyl]methylamine and benzaldehyde under Pictet-Spengler reaction occurs exclusively with the formation of aminoacetales, so this method is not applicable for the preparation of 1-aryl-2-metiltetragidrobenzotieno[2,3-c]pyridine. These pyridines were synthesized by the methylation with formaldehyde in formic acid by the reaction of Eschweiler-Clarke. Methylation of 7-methyl-1-R-1,2,3,4-tetrahydrobenzofuro[2,3-c]pyridines with formic acid and formaldehyde mixture in the Eschweiler–Clarke reaction conditions does not lead to the 2,7-dimethyl-1-R-1,2,3,4-tetrahydrobenzofuro[2,3-c]pyridine formation. Corresponding 2,7-dimethyl-1,2,3,4-tetrahydro[1]benzofuro[2,3-c]pyridine was obtained by this method. This compound is formed directly from the [2-(6-methyl-1-benzofuran-3-yl)ethyl]amine in the Eschweiler–Clarke reaction conditions. Eschweiler-Clarke reaction proceeds well in the series of benzothienyl-3-ethyl(propyl)amine. 2-Methyl-1,2,3,4-benzothieno[2,3-c]pyridines and 2-methyl-2,3,4,5-tetrahydro-1H-benzothieno[2,3-c]azepine were obtained by heating of 2-(1-benzothienyl-3)ethylamine and benzothienyl-3-propylamine in a mixture of 90% formic acid - formaldehyde in high yields. Benzothienyl-3-propylamine does not react with aromatic aldehydes under any conditions. We have shown that the Eschweiler–Clarke reaction conditions can be successfully used for obtaining of N-substituted derivatives of benzothieno[2,3-c]pyridines and benzothieno[2,3-c]azepine. | en_US |
dc.publisher | Донецк, ДонНТУ | en_US |
dc.relation.ispartofseries | Наукові праці ДонНТУ;Серія: Хімія і хімічна технологія, 2013. - Вип.1(20). - С.109-115 | - |
dc.subject | 1,2,3,4-тетрагидробензофуро[2,3-с]пиридины | en_US |
dc.subject | 2,3,4,5-тетрагидро-1H-[1]бензотиено[2,3-c]азепины | en_US |
dc.subject | Реакция Эшвайлера-Кларка | en_US |
dc.subject | реакция Пикте-Шпенглера | en_US |
dc.subject | 1,2,3,4 тетрагидробензотиено[2,3-с]пиридины | en_US |
dc.subject | 2,3,4,5-tetrahydro-1H-[1]benzothieno[2,3-c]azepines | en_US |
dc.subject | Eschweiler–Clarke reaction | en_US |
dc.subject | Pictet-Spengler reaction | en_US |
dc.subject | 1,2,3,4-tetrahydrobenzothieno[2,3-c]pyridines | en_US |
dc.subject | 1,2,3,4-tetrahydrobenzofuro[2,3-c]pyridines | en_US |
dc.title | РЕАКЦИЯ ЭШВАЙЛЕРА-КЛАРКА В СИНТЕЗЕ ТЕТРАГИДРОБЕНЗО-ТИЕНО[2,3-С]ПИРИДИНОВ, ТЕТРАГИДРОБЕНЗОФУРО[2,3-С]ПИРИДИНОВ, ТЕТРАГИДРОБЕНЗОТИЕНО[2,3-С]АЗЕПИНОВ | en_US |
dc.title.alternative | ESCHWEILER-CLARKE REACTION IN SYNTHESIS OF TETRAHYDROBENZOTHIENO[2,3-C]PYRIDINES, TETRAHYDROBENZOFURO [2,3-C]PYRIDINES, TETRAHYDROBENZOTHIENO[2,3-C]PYRIDINES | en_US |
dc.type | Article | en_US |
Розташовується у зібраннях: | Випуск 1(20) |
Файли цього матеріалу:
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