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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vestich</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия химических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Chemical Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8331</issn><issn pub-type="epub">2524-2342</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8331-2026-62-2-124-131</article-id><article-id custom-type="elpub" pub-id-type="custom">vestich-1015</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>АНАЛИТИЧЕСКАЯ ХИМИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ANALYTICAL CHEMISTRY</subject></subj-group></article-categories><title-group><article-title>Сложные эфиры пиколиновой кислоты с гидроксибензальдегидами и их иминопроизводные</article-title><trans-title-group xml:lang="en"><trans-title>Picolinic esters with hydroxybenzaldehydes and their imine derivatives</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дикусар</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Dikusar</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дикусар Евгений Анатольевич – кандидат химических науке, старший научный сотрудник.</p><p>Ул. Сурганова, 13, 220072, Минск</p></bio><bio xml:lang="en"><p>Dikusar Evgenij A. – Ph. D. (Chemistry), Senior Researcher.</p><p>13, Surganov Str., 220072, Minsk</p></bio><email xlink:type="simple">evgen_58@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Акишина</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Akishina</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Акишина Екатерина Александровна – научный cотрудник.</p><p>Ул. Сурганова, 13, 220072, Минск</p></bio><bio xml:lang="en"><p>Akishina Ekaterina A. – Researcher.</p><p>13, Surganov Str., 220072, Minsk</p></bio><email xlink:type="simple">che.semenovaea@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Маргун</surname><given-names>Е. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Margun</surname><given-names>E. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Маргун Екатерина Николаевна – младший научный сотрудник.</p><p>Ул. Сурганова, 13, 220072, Минск</p></bio><bio xml:lang="en"><p>Margun Ekaterina N. – Junior Researcher.</p><p>13, Surganov Str., 220072, Minsk</p></bio><email xlink:type="simple">margunen0555@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жуковская</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhukovskaya</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Жуковская Нелия Александровна – научный сотрудник.</p><p>Ул. Сурганова, 13, 220072, Минск</p></bio><bio xml:lang="en"><p>Zukovskaya Neliy A. – Researcher.</p><p>13, Surganov Str., 220072, Minsk</p></bio><email xlink:type="simple">neliya_zhukovskaya@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Колесник</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kolesnik</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Колесник Ирина Андреевна – кандидат химических наук, старший научный сотрудник.</p><p>Ул. Сурганова, 13, 220072, Минск</p></bio><bio xml:lang="en"><p>Kolesnik Irina An. – Ph. D. (Chemistry), Senior Researcher.</p><p>13, Surganov Str., 220072, Minsk</p></bio><email xlink:type="simple">irynakolesnik93@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ковальская</surname><given-names>С. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kovalʼskaya</surname><given-names>S. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ковальская Светлана Степановна – кандидат химических наук, старший научный сотрудник.</p><p>Ул. Сурганова, 13, 220072, Минск</p></bio><bio xml:lang="en"><p>Kovalʼskaya Svetlana S. – Ph. D. (Chemistry), Senior Researcher.</p><p>13, Surganov Str., 220072, Minsk</p></bio><email xlink:type="simple">kovalskaya_61@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Поткин</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Potkin</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Поткин Владимир Иванович – академик, доктор химических наук, профессор, заведующий лабораторией.</p><p>Ул. Сурганова, 13, 220072, Минск</p></bio><bio xml:lang="en"><p>Potkin Vladimir I. – Academician, Dr. Sci. (Chemistry), Professor, Head of the Laboratory.</p><p>13, Surganov Str., 220072, Minsk</p></bio><email xlink:type="simple">potkin@ifoch.bas-net.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физико-органической химии Национальной академии наук Беларуси</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Institute of Physical Organic Chemistry of the National Academy of Sciences of Belarus</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>26</day><month>05</month><year>2026</year></pub-date><volume>62</volume><issue>2</issue><fpage>124</fpage><lpage>131</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Дикусар Е.А., Акишина Е.А., Маргун Е.Н., Жуковская Н.А., Колесник И.А., Ковальская С.С., Поткин В.И., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Дикусар Е.А., Акишина Е.А., Маргун Е.Н., Жуковская Н.А., Колесник И.А., Ковальская С.С., Поткин В.И.</copyright-holder><copyright-holder xml:lang="en">Dikusar E.A., Akishina E.A., Margun E.N., Zhukovskaya N.A., Kolesnik I.A., Kovalʼskaya S.S., Potkin V.I.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestichem.belnauka.by/jour/article/view/1015">https://vestichem.belnauka.by/jour/article/view/1015</self-uri><abstract><p>Реакцией гидроксибензальдегидов с пиколиновой (2-пиридинкарбоновой) кислотой в присутствии ДЦК в среде дихлорметана были получены соответствующие сложные эфиры с выходом 77−88 %. Последующей конденсацией альдегидоэфиров с 4-аминоантипирином в кипящем метаноле синтезированы (Е)-4-(1,5-диметил3-оксо-2-фенил-2,3-дигидро-1н-пиразол-4-ил)иминопроизводные с выходом 65−75 %, при этом азометины на основе 2и 3-формилфенилпиколинатов получить не удалось из-за алкоголиза сложноэфирных групп. Проведено квантово-химическое моделирование электронной структуры синтезированных соединений методом ab initio с уровнем теории HF/6-31G с целью предварительной оценки их потенциальных антибактериальных и противовирусных свойств.</p></abstract><trans-abstract xml:lang="en"><p>The reaction of hydroxybenzaldehydes with picolinic (2-pyridinecarboxylic) acid in the presence of DCC in dichloromethane afforded the corresponding esters in 77−88 % yield. By subsequent condensation of aldehydoesters with 4-aminoantipyrine in boiling methanol were synthesized their (E)-4-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1h-pyrazole4-il)imine in 65−75 % yield, but azomethines based on 2and 3-formylphenyl picolinates couldn’t be obtained due to alcoholysis of the ester groups. Quantum-chemical modeling of the electronic structure of the synthesized compounds using ab initio method with the HF/6-31G level of theory was performed for preliminary assessment of their potential antibacterial and antiviral properties.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>пиколиновая кислота</kwd><kwd>гидроксибензальдегиды</kwd><kwd>ацилирование</kwd><kwd>дициклогексилкарбодиимид</kwd><kwd>сложные эфиры</kwd><kwd>4-аминоантипирин</kwd><kwd>азометины</kwd><kwd>квантово-химическое моделирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>picolinic acid</kwd><kwd>hydroxybenzaldehydes</kwd><kwd>acylation</kwd><kwd>dicyclohexylcarbodiimide</kwd><kwd>esters</kwd><kwd>4-aminoantipyrine</kwd><kwd>azomethines</kwd><kwd>quantum chemical modeling</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Anti-infectious activity of tryptophan metabolites in the L-triptophan – L-kynurenine pathway / K. 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