{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T13:58:41Z","timestamp":1790603921003,"version":"4.1.0"},"reference-count":52,"publisher":"Wiley","issue":"40","license":[{"start":{"date-parts":[[2026,8,19]],"date-time":"2026-08-19T00:00:00Z","timestamp":1787097600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,8,19]],"date-time":"2026-08-19T00:00:00Z","timestamp":1787097600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Angew Chem Int Ed"],"published-print":{"date-parts":[[2026,9,28]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>Multiple resonance (MR) emitters have attracted considerable attention owing to their narrowband emission and high efficiency in organic light\u2010emitting diodes (OLEDs). Although carbonyl incorporation into MR frameworks is an effective strategy for enhancing spin\u2010related excited\u2010state processes, synthetic approaches for introducing carbonyl groups into MR skeletons remain highly limited. Herein, we report a regioselective late\u2010stage acylation strategy for boron\u2010based MR emitters using readily accessible acid chlorides. The reaction proceeds without Lewis acid catalysts and exhibits broad substrate scope with excellent regioselectivity. Comparative experiments together with DFT calculations revealed that the unique MR\u2010type electronic structure of the DABNA framework promotes unusual regioselective C\u2500C bond formation over conventional N\u2010acylation pathways. The resulting acylated intermediates were further transformed into fused\u2010ring carbonyl\u2010functionalized MR emitters through intramolecular cross\u2010coupling reactions. Furthermore, the resulting acylated intermediates serve as versatile synthetic platforms for the development of advanced MR emitters. Photophysical and theoretical analyses demonstrated that carbonyl incorporation enhances spin\u2013orbit coupling (SOC) and activates ISC\/RISC processes, leading to distinct thermally activated delayed fluorescence behavior. This strategy substantially expands the accessible chemical space of MR emitters and provides a versatile platform for developing advanced MR\u2010TADF materials.<\/jats:p>","DOI":"10.1002\/anie.2809640","type":"journal-article","created":{"date-parts":[[2026,8,19]],"date-time":"2026-08-19T14:14:23Z","timestamp":1787148863000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Regioselective Acylation for the Versatile Synthesis of Carbonyl\u2011Functionalized Boron\u2010Based Multiple Resonance Emitters"],"prefix":"10.1002","volume":"65","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2143-6001","authenticated-orcid":false,"given":"Yuta","family":"Matsumuro","sequence":"first","affiliation":[{"name":"Department of Chemistry, Graduate School of Science Kyoto University  Kyoto 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Crystallographic Data Are Provided Free of Charge by the Joint Cambridge Crystallographic Data Centre and Fachinformationszentrum Karlsruhe Access Structures Service. Deposition numbers 2547275 (for phenyl(9\u2010phenyl\u20109H\u20105\u2010oxa\u20109\u2010aza\u201013b\u2010boranaphtho[3 2 1\u2010de]anthracen\u20106\u2010yl)methanone) and 2547276 (forp\u2010tBu\u2010DABNA\u2010COBT)."},{"key":"e_1_2_6_51_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201506335"},{"key":"e_1_2_6_52_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja00326a036"},{"key":"e_1_2_6_53_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja00279a008"}],"container-title":["Angewandte Chemie International Edition"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/anie.2809640","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/anie.2809640","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/anie.2809640","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T13:18:34Z","timestamp":1790601514000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/anie.2809640"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,8,19]]},"references-count":52,"journal-issue":{"issue":"40","published-print":{"date-parts":[[2026,9,28]]}},"alternative-id":["10.1002\/anie.2809640"],"URL":"https:\/\/doi.org\/10.1002\/anie.2809640","archive":["Portico"],"relation":{},"ISSN":["1433-7851","1521-3773"],"issn-type":[{"value":"1433-7851","type":"print"},{"value":"1521-3773","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,8,19]]},"assertion":[{"value":"2026-05-21","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-08-04","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-08-19","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"e2809640"}}