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Ease execution, mild conditions, and high yields make this method exploitable for the generation of libraries of 3-substituted 4-chloroquinolines and quinolin-4(1H)-ones with extended \u03c0-conjugated systems. To demonstrate the usefulness of these compounds as precursors for the synthesis of more complex structures, 3-vinylquinolin-4(1H)-ones were used as dienes in the Diels\u2013Alder reaction with N-methylmaleimide to produce novel acridone derivatives. The attempted Diels\u2013Alder reaction with 3-(buta-1,3-dien-1-yl)quinolin-4(1H)-one did not afford the expected cycloadduct; instead, 2-methyl-2H-pyrano[3,2-c]quinoline was obtained. The structures and stereochemistry of the new compounds were established by NMR studies.<\/jats:p>","DOI":"10.1155\/2022\/4807767","type":"journal-article","created":{"date-parts":[[2022,12,6]],"date-time":"2022-12-06T03:35:05Z","timestamp":1670297705000},"page":"1-12","source":"Crossref","is-referenced-by-count":0,"title":["Ultrasound-Assisted Wittig Reaction for the Synthesis of 3-Substituted 4-Chloroquinolines and Quinolin-4(1H)-ones with Extended \u03c0-Conjugated Systems"],"prefix":"10.1155","volume":"2022","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8061-2407","authenticated-orcid":true,"given":"Wahiba","family":"Frites","sequence":"first","affiliation":[{"name":"Laboratory of Applied Organic Chemistry (LCOA), Faculty of Chemistry, USTHB, BP 32 EL-Alia, Bab-Ezzouar, Algiers 16111, Algeria"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4318-6058","authenticated-orcid":true,"given":"Massaab","family":"Khalfaoui","sequence":"additional","affiliation":[{"name":"Laboratory of Applied Organic Chemistry (LCOA), Faculty of Chemistry, USTHB, BP 32 EL-Alia, Bab-Ezzouar, Algiers 16111, Algeria"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6354-1232","authenticated-orcid":true,"given":"Lamouri","family":"Hammal","sequence":"additional","affiliation":[{"name":"Laboratory of Applied Organic Chemistry (LCOA), Faculty of Chemistry, USTHB, BP 32 EL-Alia, Bab-Ezzouar, Algiers 16111, Algeria"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0938-5085","authenticated-orcid":true,"given":"Vera L. 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