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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">667107</article-id><article-id pub-id-type="doi">10.31857/S0044460X23020117</article-id><article-id pub-id-type="edn">QBZRZO</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">Optimization of conditions for the synthesis of calyx[4]resorcinol conformers containing 4-dimethylammoniophenyl fragments on the lower rim of the molecule based on the response surface methodology using three-level box-behnken plans</article-title><trans-title-group xml:lang="ru"><trans-title>Оптимизация условий синтеза конформеров каликс[4]резорцина, содержащего 4-диметиламмониофенильные фрагменты по нижнему ободу молекулы, на основе методологии поверхности отклика c использованием трехуровневых планов бокса-бенкена</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bakeeva</surname><given-names>R. F</given-names></name><name xml:lang="ru"><surname>Бакеева</surname><given-names>Р. Ф</given-names></name></name-alternatives><email>gurf71@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Parfenova</surname><given-names>A. G</given-names></name><name xml:lang="ru"><surname>Парфенова</surname><given-names>А. Г</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shatalovav</surname><given-names>N. I</given-names></name><name xml:lang="ru"><surname>Шаталова</surname><given-names>Н. И</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sopin</surname><given-names>V. F</given-names></name><name xml:lang="ru"><surname>Сопин</surname><given-names>В. Ф</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gavrilova</surname><given-names>E. L</given-names></name><name xml:lang="ru"><surname>Гаврилова</surname><given-names>Е. Л</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Kazan National Research Technological University</institution></aff><aff><institution xml:lang="ru">Казанский национальный исследовательский технологический университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-02-15" publication-format="electronic"><day>15</day><month>02</month><year>2023</year></pub-date><volume>93</volume><issue>2</issue><issue-title xml:lang="en">NO2 (2023)</issue-title><issue-title xml:lang="ru">№2 (2023)</issue-title><fpage>253</fpage><lpage>265</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 ©; 2023, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Российская академия наук</copyright-statement><copyright-year>2023</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/667107">https://transsyst.ru/0044-460X/article/view/667107</self-uri><abstract xml:lang="en"><p>The response surface methodology using three-level Box-Behnken plans was applied in order to optimize the yield of the cone and chair conformers in the synthesis of calix[4]resorcinol functionalized with 4-dimethylammoniophenyl group along the lower rim. We used data from one-factor experiments in which the temperature, reaction time, and molar ratio of HCl to the reactants of the reaction mixture were varied to plot the response surfaces. The ratio of conformers was calculated based on the analysis of <sup>1</sup>H NMR spectra of the products isolated from the reaction mixture. The adequacy of the proposed mathematical models for determining the yields of chair and cone conformations is confirmed by a high correlation coefficient ( R 0.99979). Optimal conditions were found for the maximum yield of the chair conformation (50°C, 2 h, molar ratio of HCl to reagents in the reaction mixture is 1-1.5, yield 100%). The optimal conditions for obtaining the cone conformation are: temperature 68.6°С, stirring time in the range of 2.24-6.44 h and the molar ratio of HCl to reagents in the reaction mixture is 2. Carrying out the synthesis under these conditions leads to the yield of the cone conformation in the range of 57.70-58.07%.</p></abstract><trans-abstract xml:lang="ru"><p>С целью оптимизации выхода конформеров конус и кресло в синтезе каликс[4]резорцина, функционализированного 4-диметиламмониофенильным фрагментом по нижнему ободу, была применена методология поверхности отклика c использованием трехуровневых планов Бокса-Бенкена. Для построения поверхностей отклика использовали данные однофакторных экспериментов, в которых варьировались температура, время реакции и мольное соотношение HCl к реагентам реакционной смеси. Соотношение конформеров рассчитывали исходя из анализа спектров ЯМР <sup>1</sup>Н продуктов, выделенных из реакционной смеси. Адекватность предложенных математических моделей для определения выходов конформаций кресло и конус подтверждается высоким коэффициентом корреляции ( R 0.99979). Подобраны оптимальные условия для получения конформации кресло (50°C, 2 ч, мольное соотношение HCl:реагенты = 1-1.5, выход 100%) и конформации конус (68.6°С, 2.24-6.44 ч, мольное соотношение HCl:реагенты = 2, выход 57.70-58.07%).</p></trans-abstract><kwd-group xml:lang="en"><kwd>Calix[4]resorcinol</kwd><kwd>cone and chair conformers</kwd><kwd>response surface methodology</kwd><kwd>three-level Box- Behnken designs</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>каликс[4]резорцин</kwd><kwd>конформеры конус и кресло</kwd><kwd>методология поверхностей отклика</kwd><kwd>трехуровневые планы Бокса-Бенкена</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Шаталова Н.И., Гаврилова Е.Л., Наумова А.А., Бурилов А.Р., Фосс Л.Е., Пудовик М.А., Красильникова Е.А., Коновалов А.И. // ЖОХ. 2005. Т. 75. Вып. 8. 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