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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 Organic Chemistry</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Organic Chemistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал органической химии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0514-7492</issn><issn publication-format="electronic">3034-6304</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">697746</article-id><article-id pub-id-type="doi">10.7868/S3034630425060167</article-id><article-categories><subj-group subj-group-type="toc-heading"><subject>ЭКСПЕРИМЕНТАЛЬНЫЕ 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">Benzazoles. IV. Interaction of Benzimidazolin-2-ones with Chlorsulphonic Acid</article-title><trans-title-group xml:lang="ru"><trans-title>БЕНЗАЗОЛЫ. IV. ВЗАИМОДЕЙСТВИЕ БЕНЗИМИДАЗОЛИН-2-ОНОВ С ХЛОРСУЛЬФОНОВОЙ КИСЛОТОЙ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Takhirov</surname><given-names>Y. R.</given-names></name><name xml:lang="ru"><surname>Тахиров</surname><given-names>Ю. Р.</given-names></name></name-alternatives><email>yuldash_78@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dushamov</surname><given-names>D. A.</given-names></name><name xml:lang="ru"><surname>Душамов</surname><given-names>Д. А.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kuryazov</surname><given-names>R. Sh.</given-names></name><name xml:lang="ru"><surname>Курязов</surname><given-names>Р. Ш.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Usmonov</surname><given-names>R. M.</given-names></name><name xml:lang="ru"><surname>Усмонов</surname><given-names>Р. М.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Urgench State University</institution></aff><aff><institution xml:lang="ru">Ургенчский государственный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2025</year></pub-date><volume>61</volume><issue>6</issue><issue-title xml:lang="en">VOL 61, NO6 (2025)</issue-title><issue-title xml:lang="ru">ТОМ 61, №6 (2025)</issue-title><fpage>761</fpage><lpage>767</lpage><history><date date-type="received" iso-8601-date="2025-12-04"><day>04</day><month>12</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><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2026-06-15"/></permissions><self-uri xlink:href="https://vietnamjournal.ru/0514-7492/article/view/697746">https://vietnamjournal.ru/0514-7492/article/view/697746</self-uri><abstract xml:lang="en"><p>When benzimidazolin-2-ones interacted with chlorosulfonic acid in five different ratios (1 : 1–5) at 50–60°C, even when the reagents were used in equimolar amounts, 5-chlorosulfonylbenzimidazolin-2-ones were formed. In the case of 5-chlorobenzimidazoline-2-ones do not react with chlorosulfonic acid at 50–60°C and the corresponding 5-chlorosulfonyl-6-chlorobenzimidazoline-2-ones were synthesised at 110–120°C.</p></abstract><trans-abstract xml:lang="ru"><p>При взаимодействии бензимидазолин-2-онов с хлорсульфоновой кислотой в различных соотношениях (1 : 1–5) при 50–60°C даже при использовании реагентов в эквимолярных количествах образовывались 5-хлорсульфонилбензимидазолин-2-оны. В случае 5-хлорбензимидазолин-2-онов реакция с хлорсульфоновой кислотой не протекает при 50–60°C, и соответствующие 5-хлорсульфонил-6-хлорбензимидазолин-2-оны были синтезированы при 110–120°C.</p></trans-abstract><kwd-group xml:lang="en"><kwd>benzimidazolin-2-one</kwd><kwd>1,3-dimethylbenzimidazolin-2-one</kwd><kwd>5-chlorobenzimidazolin-2-one</kwd><kwd>1,3-dimethyl-5-chlorobenzimidazolin-2-one</kwd><kwd>5-chlorosulfonylbenzimidazolin-2-ones</kwd><kwd>6-chloro-5-chlorosulfonylbenzimidazolin-2-ones</kwd><kwd>chlorosulfonylations</kwd><kwd>electrophilic substitution</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>бензимидазолин-2-он</kwd><kwd>1,3-диметилбензимидазолин-2-он</kwd><kwd>5-хлорбензимидазолин-2-он</kwd><kwd>1,3-диметил-5-хлорбензимидазолин-2-он</kwd><kwd>5-хлорсульфонилбензимидазолин-2-оны</kwd><kwd>5-хлорсульфонил-6-хлорбензимидазолин-2-оны</kwd><kwd>хлорсульфонилирование</kwd><kwd>электрофильное замещение</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Душамов Д.А., Тахиров Ю.Р., Курязов Р.Ш., Мухамедов Н.С. 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