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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Doklady Chemistry</journal-id><journal-title-group><journal-title xml:lang="en">Doklady Chemistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Доклады Российской академии наук. Химия, науки о материалах</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2686-9535</issn><issn publication-format="electronic">3034-5111</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">651992</article-id><article-id pub-id-type="doi">10.31857/S268695352260026X</article-id><article-id pub-id-type="edn">EVOAXA</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>CHEMISTRY</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ХИМИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">TRANSFORMATIONS OF 5-HYDRAZINYL-1,2,4-TRIAZINES IN THE REACTION WITH 2,5-NORBORNADIENE</article-title><trans-title-group xml:lang="ru"><trans-title>Превращения 5-гидразинил-1,2,4-триазинов в реакции с 2,5-норборнадиеном</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Krinochkin</surname><given-names>A. P.</given-names></name><name xml:lang="ru"><surname>Криночкин</surname><given-names>А. П.</given-names></name></name-alternatives><email>igor.nikonov.ekb@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Rammohan</surname><given-names>A.</given-names></name><name xml:lang="ru"><surname>Раммохан</surname><given-names>А.</given-names></name></name-alternatives><email>igor.nikonov.ekb@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kopchuk</surname><given-names>D. S.</given-names></name><name xml:lang="ru"><surname>Копчук</surname><given-names>Д. С.</given-names></name></name-alternatives><email>igor.nikonov.ekb@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nikonov</surname><given-names>I. L.</given-names></name><name xml:lang="ru"><surname>Никонов</surname><given-names>И. Л.</given-names></name></name-alternatives><email>igor.nikonov.ekb@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Starnovskaya</surname><given-names>E. S.</given-names></name><name xml:lang="ru"><surname>Старновская</surname><given-names>Е. С.</given-names></name></name-alternatives><email>igor.nikonov.ekb@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sharafieva</surname><given-names>E. R.</given-names></name><name xml:lang="ru"><surname>Шарафиева</surname><given-names>Э. Р.</given-names></name></name-alternatives><email>igor.nikonov.ekb@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kovalev</surname><given-names>I. S.</given-names></name><name xml:lang="ru"><surname>Ковалёв</surname><given-names>И. С.</given-names></name></name-alternatives><email>igor.nikonov.ekb@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zyryanov</surname><given-names>G. V.</given-names></name><name xml:lang="ru"><surname>Зырянов</surname><given-names>Г. В.</given-names></name></name-alternatives><email>igor.nikonov.ekb@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Chupakhin</surname><given-names>O. N.</given-names></name><name xml:lang="ru"><surname>Чупахин</surname><given-names>О. Н.</given-names></name></name-alternatives><email>igor.nikonov.ekb@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Ural Federal University</institution></aff><aff><institution xml:lang="ru">Уральский федеральный университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">I.Ya. Postovsky Institute of Organic Synthesis of the Ural Branch of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт органического синтеза 
им. И.Я. Постовского Уральского отделения 
Российской академии наук</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Ural State Medical University, Ministry of Healthcare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">Уральский государственный медицинский университет Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-01-01" publication-format="electronic"><day>01</day><month>01</month><year>2023</year></pub-date><volume>508</volume><issue>1</issue><fpage>50</fpage><lpage>54</lpage><history><date date-type="received" iso-8601-date="2025-02-02"><day>02</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, А.П. Криночкин, А. Раммохан, Д.С. Копчук, И.Л. Никонов, Е.С. Старновская, Э.Р. Шарафиева, И.С. Ковалёв, Г.В. Зырянов, О.Н. Чупахин</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, А.П. Криночкин, А. Раммохан, Д.С. Копчук, И.Л. Никонов, Е.С. Старновская, Э.Р. Шарафиева, И.С. Ковалёв, Г.В. Зырянов, О.Н. Чупахин</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">А.П. Криночкин, А. Раммохан, Д.С. Копчук, И.Л. Никонов, Е.С. Старновская, Э.Р. Шарафиева, И.С. Ковалёв, Г.В. Зырянов, О.Н. Чупахин</copyright-holder><copyright-holder xml:lang="ru">А.П. Криночкин, А. Раммохан, Д.С. Копчук, И.Л. Никонов, Е.С. Старновская, Э.Р. Шарафиева, И.С. Ковалёв, Г.В. Зырянов, О.Н. Чупахин</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/2686-9535/article/view/651992">https://journals.eco-vector.com/2686-9535/article/view/651992</self-uri><abstract xml:lang="en"><p id="idm45181324306816">The interaction between 5-hydrazinyl-substituted 1,2,4-triazines and 2,5-norbornadiene at elevated temperature and pressure (in autoclave) have been studied. The 2-aminopyridines, 5-amino-1,2,4-triazines and 6-unsubstituted pyridines are the products of this reaction. The formation of last two products depends on the substituent at C3 position of the triazine.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45181324305920">Исследовано взаимодействие между 5-гидразинилзамещенными 1,2,4-триазинами и 2,5-норборнадиеном при повышенных давлении и температуре (в автоклаве), в результате чего неожиданно образуются 2-аминопиридины, а также 5-амино-1,2,4-триазины или 6-незамещенные пиридины (образование одного из двух последних продуктов зависит от природы заместителя в положении С3 триазина).</p></trans-abstract><kwd-group xml:lang="en"><kwd>5-hydrazinyl-1,2,4-triazines</kwd><kwd><italic>aza</italic>-Diels–Alder reaction</kwd><kwd>2,5-norbornadiene</kwd><kwd>autoclave</kwd><kwd>2-aminopyridines</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>5-гидразинил-1,2,4-триазины</kwd><kwd>реакция <italic>аза</italic>-Дильса–Альдера</kwd><kwd>2,5-норборнадиен</kwd><kwd>автоклав</kwd><kwd>2-аминопиридины</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Авторы выражают благодарность М.И. 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