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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">chemicallytech</journal-id><journal-title-group><journal-title xml:lang="en">Fine Chemical Technologies</journal-title><trans-title-group xml:lang="ru"><trans-title>Тонкие химические технологии</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2410-6593</issn><issn pub-type="epub">2686-7575</issn><publisher><publisher-name>MIREA – Russian Technological University (RTU MIREA).</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32362/2410-6593-2024-19-3-192-201</article-id><article-id custom-type="edn" pub-id-type="custom">SYTFBD</article-id><article-id custom-type="elpub" pub-id-type="custom">chemicallytech-2084</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="en"><subject>CHEMISTRY AND TECHNOLOGY OF ORGANIC SUBSTANCES</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ХИМИЯ И ТЕХНОЛОГИЯ ОРГАНИЧЕСКИХ ВЕЩЕСТВ</subject></subj-group></article-categories><title-group><article-title>Effect of 2-hexanol and methanol on the one-pot process of dehydration and alkoxycarbonylation for the synthesis of esters</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние гексанола-2 и метанола на совмещенный процесс дегидратации и алкоксикарбонилирования для синтеза сложных эфиров</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3499-2226</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Севостьянова</surname><given-names>Н. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Sevostyanova</surname><given-names>N. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Севостьянова Надежда Тенгизовна, к.х.н., доцент,  старший научный сотрудник, руководитель научно- производственного центра  Химреактивдиагностика»</p><p>300026, г. Тула, пр-т Ленина, д. 125</p><p>Scopus Author ID 25643582900</p><p>Researcher ID M-8567-2014</p></bio><bio xml:lang="en"><p>Nadezhda T. Sevostyanova, Cand. Sci. (Chem.),  Associate Professor, Senior Researcher, Head, Research and Production Center Himreaktivdiagnostika</p><p>125, Leninа pr., Tula, 300026</p><p>Scopus Author ID 25643582900</p><p>ResearcherID M-8567-2014</p></bio><email xlink:type="simple">sevostyanova.nt@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7537-7740</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Баташев</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Batashev</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Баташев Сергей Александрович, к.х.н., доцент,  старший научный сотрудник научно-производственного центра «Химреактивдиагностика»</p><p>300026, г. Тула, пр-т Ленина, д. 125</p><p>Scopus Author ID 14071256200</p><p>Researcher ID N-1405-2018</p></bio><bio xml:lang="en"><p>Sergey A. Batashev, Cand. Sci. (Chem.), Associate Professor, Senior Researcher, Research and Production  Center Himreaktivdiagnostika</p><p>125, Leninа pr., Tula, 300026</p><p>ScopusAuthor ID 14071256200</p><p>ResearcherID N-1405-2018</p></bio><email xlink:type="simple">tulapharma@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0896-5208</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Родионова</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Rodionova</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Родионова Анастасия Сергеевна, исполнитель по  гражданско-правовому договору реализации гранта  Российского научного фонда</p><p>300026, г. Тула, пр-т Ленина, д. 125</p><p>Scopus Author ID 57189375048</p></bio><bio xml:lang="en"><p>Anastasia S. Rodionova, Researcher</p><p>125, Leninа pr., Tula, 300026</p><p>Scopus Author ID 57189375048</p></bio><email xlink:type="simple">rodionova.nastia@ya.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-7166-8415</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Козленко</surname><given-names>Д. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozlenko</surname><given-names>D. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Козленко Дарья Константиновна, исполнитель по  гражданско-правовому договору реализации гранта  Российского научного фонда</p><p>300026, г. Тула, пр-т Ленина, д. 125</p><p>Scopus Author ID 58600613300</p></bio><bio xml:lang="en"><p>Dar’ya K. Kozlenko, Researcher</p><p>125, Leninа pr., Tula, 300026</p><p>Scopus Author ID 58600613300</p></bio><email xlink:type="simple">dk.reshetnikova@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тульский государственный педагогический университет им. Л.Н. Толстого</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tula State Lev Tolstoy Pedagogical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>05</day><month>07</month><year>2024</year></pub-date><volume>19</volume><issue>3</issue><fpage>192</fpage><lpage>201</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Sevostyanova N.T., Batashev S.A., Rodionova A.S., Kozlenko D.K., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Севостьянова Н.Т., Баташев С.А., Родионова А.С., Козленко Д.К.</copyright-holder><copyright-holder xml:lang="en">Sevostyanova N.T., Batashev S.A., Rodionova A.S., Kozlenko D.K.</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://www.finechem-mirea.ru/jour/article/view/2084">https://www.finechem-mirea.ru/jour/article/view/2084</self-uri><abstract><p>Objectives. To study the possibility of one-pot synthesis (combination of two processes in one reactor) for the following pairs of processes: (1) dehydration of 2-hexanol and isomerizing alkoxycarbonylation of the resulting 2-hexene, in order to obtain 2-hexyl heptanoate, and (2) dehydration of 2-hexanol and isomerizing methoxycarbonylation of the resulting 2-hexene, in order to obtain methyl esters of C7 carboxylic acids. To investigate the effect of the concentrations of 2-hexanol and methanol on the rate of the one-pot synthesis.Methods. One-pot synthesis was studied in a toluene medium in a steel batch reactor designed to operate at elevated pressure and equipped with a glass insert, a magnetic stirrer, a sampler, and gas input and discharge devices. Samples of the reaction mass were taken during the combined process and were analyzed by means of gas–liquid chromatography with a flame ionization detector.Results. The possibility of one-pot combination was demonstrated for 2-hexanol dehydration catalyzed by methanesulfonic acid, as well as for the isomerizing alkoxycarbonylation of the resulting 2-hexene with 2-hexanol and CO, catalyzed by the Pd(PPh3)2Cl2–XANTPHOS–methanesulfonic acid system. The dependencies of the rates of the dehydration of 2-hexanol and the formation of esters of C7 carboxylic acids on the concentration of 2-hexanol were shown to pass through a maximum. The possibility of the one-pot process was proved for the synthesis of esters from 2-hexanol, methanol, and CO with the predominant formation of heptanoic acid esters in the presence of the above catalytic system. The rates of dehydration of 2-hexanol and the formation of 2-hexyl esters of C7 carboxylic acids were found to decrease with increasing the concentration of methanol in the reaction mass. Under mild conditions (temperature 115°C, CO pressure 3 MPa) with the addition of methanol, the total fraction of 2-hexyl and methyl heptanoic acid esters among C7 carboxylic acid esters was determined to be 85.5%.Conclusions. The reactions of intramolecular acid–catalytic dehydration of 2-hexanol and isomerizing alkoxycarbonylation of the resulting 2-hexene, catalyzed by the Pd(PPh3)2Cl2–XANTPHOS–methanesulfonic acid system, can be performed as a one-pot process. Methanesulfonic acid simultaneously functions as a catalyst for the dehydration of 2-hexanol and a cocatalyst for the palladium–phosphine system for the alkoxycarbonylation of hexenes. In the presence of the Pd(PPh3) 2Cl2–XANTPHOS–methanesulfonic acid catalytic system, processes for the synthesis of heptanoic acid esters from 2-hexanol, methanol, and CO can be combined within one reactor. An increase in the methanol concentration negatively affects the rate of the dehydration of 2-hexanol and the formation of 2-hexyl esters of C7 carboxylic acids. A small amount of methanol in the reaction mass leads to an increase in the fraction of heptanoic acid esters among C7 carboxylic acid esters.</p></abstract><trans-abstract xml:lang="ru"><p>Цели. Изучить возможности совмещения в одном реакторе процессов: 1) дегидратации гексанола-2 и изомеризующего алкоксикарбонилирования образующегося гексена-2 для получения 2-гексилгептаноата; 2) дегидратации гексанола-2 и изомеризующего метоксикарбонилирования образующегося гексена-2 для получения метиловых эфиров карбоновых кислот С7. Исследовать закономерности влияния концентрации гексанола-2 и метанола на скорость совмещенного процесса.Методы. Совмещенный процесс изучали в среде толуола в периодическом стальном реакторе, рассчитанном на работу при повышенном давлении, снабженном стеклянной вставкой, магнитной мешалкой, пробоотборником, устройствами ввода и сброса газов. Отбираемые в ходе совмещенного процесса пробы реакционной массы анализировали методом газо-жидкостной хроматографии с пламенно-ионизационным детектором.Результаты. Показана возможность совмещения в одном реакторе дегидратации гексанола-2, катализируемой метансульфокислотой, и изомеризующего алкоксикарбонилирования образующегося гексена-2 гексанолом-2 и СО, катализируемого системой Pd(PPh3)2Cl2–XANTPHOS–метансульфокислота. Установлены экстремальные зависимости скоростей дегидратации гексанола-2 и образования сложных эфиров карбоновых кислот С7 от концентрации гексанола-2. Показана возможность реализации совмещенного в одном реакторе процесса синтеза сложных эфиров из гексанола-2, метанола и СО с преимущественным образованием сложных эфиров гептановой кислоты в присутствии указанной каталитической системы. Обнаружено снижение скоростей дегидратации гексанола-2 и образования 2-гексиловых эфиров карбоновых кислот С7 с увеличением концентрации метанола в реакционной массе. В мягких условиях (температура 115°С, давление СО 3 МПа) в присутствии добавок метанола определена суммарная доля 2-гексилового и метилового эфиров гептановой кислоты среди сложных эфиров карбоновых кислот С7, которая составила 85.5%.Выводы. Реакции внутримолекулярной кислотно-каталитической дегидратации гексанола-2 и изомеризующего алкоксикарбонилирования образующегося гексена-2, катализируемого системой Pd(PPh3) 2Cl2–XANTPHOS–метансульфокислота, могут быть совмещены в одном реакторе. Метансульфокислота одновременно выполняет функции катализатора дегидратации гексанола-2 и сокатализатора палладий-фосфиновой системы алкоксикарбонилирования гексенов. В присутствии каталитической системы Pd(PPh3) 2Cl2–XANTPHOS–метансульфокислота могут быть реализованы в одном реакторе процессы синтеза сложных эфиров гептановой кислоты из гексанола-2, метанола и СО. Увеличение концентрации метанола негативно влияет на скорости дегидратации гексанола-2 и образование 2-гексиловых эфиров карбоновых кислот С7. Небольшие количества метанола в реакционной массе приводят к увеличению доли сложных эфиров гептановой кислоты среди сложных эфиров карбоновых кислот С7.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>совмещенный процесс</kwd><kwd>синтез сложного эфира</kwd><kwd>дегидратация спирта</kwd><kwd>изомеризующее алкоксикарбонилирование</kwd><kwd>гексанол-2</kwd><kwd>метанол</kwd><kwd>палладиевый катализатор</kwd><kwd>дифосфин XANTPHOS</kwd><kwd>метансульфокислота</kwd></kwd-group><kwd-group xml:lang="en"><kwd>one-pot synthesis</kwd><kwd>ester synthesis</kwd><kwd>alcohol dehydration</kwd><kwd>isomerizing alkoxycarbonylation</kwd><kwd>2-hexanol</kwd><kwd>methanol</kwd><kwd>palladium catalyst</kwd><kwd>XANTPHOS diphosphine</kwd><kwd>methanesulfonic acid</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено за счет гранта Российского научного фонда (№ 22-23-00102), https://rscf.ru/ project/22-23-00102/.</funding-statement><funding-statement xml:lang="en">The study was supported by the Russian Science Foundation (grant No. 22-23-00102), https://rscf.ru/ project/22-23-00102/.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Kalck P., Le C., Serp B.P. 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