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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 Bioorganic Chemistry</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Bioorganic Chemistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Биоорганическая химия</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0132-3423</issn><issn publication-format="electronic">1998-2860</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">683096</article-id><article-id pub-id-type="doi">10.31857/S0132342325010053</article-id><article-id pub-id-type="edn">LZSEUQ</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">Spectral-luminescent properties of products of interaction of polyfluorinated containing a pyrazoline fragment pyrylium dyes with bovine serum albumin and amino acids</article-title><trans-title-group xml:lang="ru"><trans-title>Спектрально-люминесцентные свойства продуктов взаимодействия полифторированных пиразолинсодержащих пирилиевых красителей с бычьим сывороточным альбумином и аминокислотами</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shelkovnikov</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Шелковников</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vice@nioch.nsc.ru</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>Doroshenko</surname><given-names>D. D.</given-names></name><name xml:lang="ru"><surname>Дорошенко</surname><given-names>Д. Д.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vice@nioch.nsc.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kargapolova</surname><given-names>I. Yu.</given-names></name><name xml:lang="ru"><surname>Каргаполова</surname><given-names>И. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vice@nioch.nsc.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kozlakov</surname><given-names>P. A.</given-names></name><name xml:lang="ru"><surname>Козлаков</surname><given-names>П. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vice@nioch.nsc.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shestakov</surname><given-names>N. A.</given-names></name><name xml:lang="ru"><surname>Шестаков</surname><given-names>Н. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vice@nioch.nsc.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sotnikova</surname><given-names>Yu. S.</given-names></name><name xml:lang="ru"><surname>Сотникова</surname><given-names>Ю. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vice@nioch.nsc.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Новосибирский институт органической химии им. Н.Н. Ворожцова СО РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Novosibirsk State Technical University</institution></aff><aff><institution xml:lang="ru">Новосибирский государственный технический университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-02-15" publication-format="electronic"><day>15</day><month>02</month><year>2025</year></pub-date><volume>51</volume><issue>1</issue><issue-title xml:lang="ru"/><fpage>51</fpage><lpage>64</lpage><history><date date-type="received" iso-8601-date="2025-06-05"><day>05</day><month>06</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</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://journals.eco-vector.com/0132-3423/article/view/683096">https://journals.eco-vector.com/0132-3423/article/view/683096</self-uri><abstract xml:lang="en"><p>Studies of reaction ability fluorescent dyes for the production of labeled proteins and amino acids are important for the fields of bioengineering and biomedicine, in particular for obtaining bioimages for the purpose of cell visualization, studying the structure of labeled proteins by biophysical methods. Pyrylium dyes are able to interact with amino groups of proteins to form luminescent products, which allows them to be used in the field of proteomics. It is interesting to study the conjugation pyrylium dyes, containing both polyfluorinated fragment responsible to increased lipophilicity at proteins conjugation and pyrazoline fragment demonstrating anticancer activity. Pyrylium dyes containing a pyrazoline fragment and dialkylamino substituents (piperidino-, dibutylamino-, 4-hydroxypiperidino-) in a polyfluorinated aromatic ring in the donor part were synthesized by Knoevenagel condensation reaction. The reaction of pyrylium dyes with compounds containing a primary amino group was carried out to obtain a pyridinium dyes by the ANRORC mechanism (Addition of Nucleophiles, Ring Opening and Ring Closure). The ability of pyrуlium dyes to react with bovine serum albumin (BSA) and amino acids such as Lys, Arg, Cys, Phe to form pyridinium luminophore was shown. The spectral-luminescent properties of the resulting luminophores were investigated. The product of the reaction of pyrуlium dye (<italic>Е</italic>)-2,6-dimethyl-4-(4-{3-phenyl-5-[2,3,5,6-tetrafluorо-4-(piperidine-1-yl)phenyl]-4,5-dihydro-1<italic>Н</italic>-pуrazole-1-yl}-styryl)pyrylium tetrafluoroborate with Lys was isolated and its structure was confirmed by NMR spectroscopy. The binding site of pyrylium dyes with BSA – e-amino group of Lys was determined. Along with pyridinium luminophores, in aqueous solutions hydrolysis products are formed that are not bonded with protein and absorb in the short-wavelength region. The calculated amount of luminophore bound to BSA is two molecules of pyrylium dye per one molecule of BSA. The synthesized pyrylium dyes react with BSA in the mixture of phosphate buffer with methanol (pH 7.4) 3–4 orders of magnitude faster than the well-known julolidine dye Py-1. The relative reaction rates of (<italic>Е</italic>)-2,6-dimethyl-4-(4-{3-phenyl-5-[2,3,5,6-tetrafluorо-4-(4-hydroxypiperidine-1-yl)phenyl]-4,5-dihydro-1<italic>Н</italic>-pуrazole-1-yl}styryl) pyrуlium tetrafluoroborate with amino acids were determined as Lys &gt; Cys &gt;&gt; Phe ≥ Arg. The obtained polyfluoro pyrylium-pyrazolinium dyes have the application perspective in the field of bioimaging, proteomic and biomedicine, due to high conjunction rate and efficiency with BSA and amino acids.</p></abstract><trans-abstract xml:lang="ru"><p>Синтезированы и охарактеризованы пирилоцианиновые красители, содержащие в донорной части пиразолиновый фрагмент и диалкиламино-заместители (пиперидино-, дибутиламино-, 4-гидроксипиперидино-) в полифторированном ароматическом кольце. Показана способность пирилиевых красителей реагировать с бычьим сывороточным альбумином (BSA) и аминокислотами, такими как Lys, Arg, Cys, Phe, с образованием пиридоцианинового люминофора. Исследованы спектрально-люминесцентные свойства образующихся люминофоров. Выделен продукт реакции тетрафторбората (<italic>Е</italic>)-2,6-диметил-4-(4-{3-фенил-5-[2,3,5,6-тетрафтор-4-(пиперидин-1-ил)фенил]-4,5-дигидро-1<italic>Н</italic>-пиразол-1-ил}-стирил)пирилия с Lys, его структура подтверждена методом ЯМР и данными элементного анализа. Определено вероятное место связывания синтезированных пирилиевых красителей c BSA – это ε-аминогруппа аминокислотного остатка Lys. Рассчитано, что количество связанного с BSA люминофора составляет две молекулы пирилиевого красителя на одну молекулу BSA. Синтезированные пирилиевые красители реагируют с BSA в смеси фосфатного буфера с метанолом (рН<italic> </italic>7.4) на 3–4 порядка быстрее, чем известный юлолидиновый краситель Py-1. Определены относительные скорости реакции тетрафторборатa (<italic>Е</italic>)-2,6-диметил-4-(4-{3-фенил-5-[2,3,5,6-тетрафтор-4-(4-гидроксипиперидин-1-ил)фенил]-4,5-дигидро-1<italic>Н</italic>-пиразол-1-ил}стирил)пирилия с аминокислотами:<bold> </bold>Lys <bold>&gt;</bold> Cys <bold>&gt;&gt; </bold>Phe ≥ Arg</p></trans-abstract><kwd-group xml:lang="en"><kwd>polyfluorinated pyrylium/pyridocyanine dyes</kwd><kwd>synthesis</kwd><kwd>amino acids</kwd><kwd>BSA</kwd><kwd>spectral luminescent properties</kwd><kwd>reactivity</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>полифторированные пирилоцианиновые/пиридоцианиновые красители</kwd><kwd>синтез</kwd><kwd>аминокислоты</kwd><kwd>BSA</kwd><kwd>спектрально-люминесцентные свойства</kwd><kwd>реакционная способность</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Госзадание НИОХ СО РАН</institution></institution-wrap><institution-wrap><institution xml:lang="en">State assignment of the Research Institute of Organic Chemistry SB RAS</institution></institution-wrap></funding-source><award-id>0238-2021-0006</award-id></award-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Госзадание НИОХ СО РАН</institution></institution-wrap><institution-wrap><institution xml:lang="en">State assignment of the Research Institute of Organic Chemistry SB RAS</institution></institution-wrap></funding-source><award-id>1220 4040 0029-2</award-id></award-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Госзадание НИОХ СО РАН</institution></institution-wrap><institution-wrap><institution xml:lang="en">State assignment of the Research Institute of Organic Chemistry SB RAS</institution></institution-wrap></funding-source><award-id>FWUE-2025-0007</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Roura S., Gálvez-Montón C., Bayes-Genis A. // J. 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