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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of General Chemistry</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of General Chemistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал общей химии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0044-460X</issn><issn publication-format="electronic">3034-5596</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">667441</article-id><article-id pub-id-type="doi">10.31857/S0044460X24030079</article-id><article-id pub-id-type="edn">FYXKNI</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Synthesis and Transformations of Hydrazine-Substituted Pyrano[3″,4″:5′,6′]pyrido[3′,2′:4,5]thieno[3,2-d]pyrimidine</article-title><trans-title-group xml:lang="ru"><trans-title>Синтез и превращения гидразинозамещенного пирано[3″,4″:5′,6′]пиридо[3′,2′:4,5]тиено[3,2-d]пиримидина</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2980-2552</contrib-id><name-alternatives><name xml:lang="en"><surname>Dabaeva</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Дабаева</surname><given-names>Валя Вардановна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>valyadabayeva@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6048-3599</contrib-id><name-alternatives><name xml:lang="en"><surname>Paronikyan</surname><given-names>E. G.</given-names></name><name xml:lang="ru"><surname>Пароникян</surname><given-names>Ерванд Гарникович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>valya.dabayeva@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4620-6034</contrib-id><name-alternatives><name xml:lang="en"><surname>Barkhudaryants</surname><given-names>I. M.</given-names></name><name xml:lang="ru"><surname>Бархударянц</surname><given-names>Ирен Михаеловна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>valya.dabayeva@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6365-3725</contrib-id><name-alternatives><name xml:lang="en"><surname>Dashyan</surname><given-names>Sh. Sh.</given-names></name><name xml:lang="ru"><surname>Дашян</surname><given-names>Шушаник Шамировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>valya.dabayeva@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7092-0556</contrib-id><name-alternatives><name xml:lang="en"><surname>Baghdasaryana</surname><given-names>M. R.</given-names></name><name xml:lang="ru"><surname>Багдасарян</surname><given-names>Мери Рафаеловна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>valya.dabayeva@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Scientific and Technological Center of Organic and Pharmaceutical Chemistry, National Academy of Science of the Republic of Armenia</institution></aff><aff><institution xml:lang="ru">Научно-технологический центр органической и фармацевтической химии Национальной академии наук Республики Армения</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2024</year></pub-date><volume>94</volume><issue>3</issue><fpage>370</fpage><lpage>375</lpage><history><date date-type="received" iso-8601-date="2025-02-26"><day>26</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://transsyst.ru/0044-460X/article/view/667441">https://transsyst.ru/0044-460X/article/view/667441</self-uri><abstract xml:lang="en"><p>A method was developed for the synthesis of 11-(2-furyl)-4-hydrazino-8,8-dimethyl-7,10-dihydro-8<italic>H</italic>-pyrano[3″,4″:5′,6′]pyrido[3′,2′:4,5]thieno[3,2-<italic>d</italic>]pyrimidine on the basis of which new heterocyclic systems were synthesized. The conditions for the azido/tetrazole transformation of the resulting condensed tetrazolo[1,5-<italic>c</italic>]pyrimidine were studied. Isomeric triazolo[4,3-<italic>c</italic>]- and -[1,5-<italic>c</italic>]pyrimidines were synthesized and the conditions for the transformation of the first isomer into the second in accordance with the Dimroth rearrangement were established.</p></abstract><trans-abstract xml:lang="ru"><p>Разработан метод синтеза 11-(2-фурил)-4-гидразино-8,8-диметил-7,10-дигидро-8<italic>H</italic>-пирано[3″,4″:5′,6′]пиридо[3′,2′:4,5]тиено[3,2-<italic>d</italic>]пиримидина, на основе которого синтезированы новые гетероциклические системы. Исследованы условия азидо/тетразольного превращения полученного конденсированного тетразоло[1,5-<italic>с</italic>]пиримидина. Синтезированы изомерные триазоло[4,3-<italic>с</italic>]- и -[1,5-<italic>с</italic>]пиримидины и установлены условия превращения первого изомера во второй в соответствии с перегруппировкой Димрота.</p></trans-abstract><kwd-group xml:lang="en"><kwd>rearrangement</kwd><kwd>thieno[3,2-d]pyrimidine</kwd><kwd>triazolo[4,3-c]pyrimidines</kwd><kwd>triazolo[1,5-c]pyrimidines</kwd><kwd>azido/tetrazole transformation</kwd><kwd>pyrazoles</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>перегруппировка</kwd><kwd>тиено[3,2-d]пиримидин</kwd><kwd>триазоло[4,3-с]пиримидины</kwd><kwd>триазоло[1,5-с]пиримидины</kwd><kwd>азидо/тетразольное превращение</kwd><kwd>пиразолы</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Devi M., Jaiswal S., Jain S., Kaur N., Dwivedi J. // Curr. Org. Synth. 2021.Vol. 18. N 8. 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