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In the proposed mechanistic cycle an initial hydrogen atom abstraction (HAT) is followed by a 1,2\u2010spin center shift (SCS) as key steps. Interestingly, Eosin Y was found to act as a pre\u2010catalyst dissociating into a catalytically active mixture under irradiation. To the best of our knowledge, this exemplifies the first synthetic utilization of Eosin Y degradation products. As a result, our reaction can be realized with a single organic photocatalyst and releases water as a sole by\u2010product.<\/jats:p>","DOI":"10.1002\/chem.202404200","type":"journal-article","created":{"date-parts":[[2024,12,9]],"date-time":"2024-12-09T01:20:42Z","timestamp":1733707242000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Photocatalyzed Dehydration of 1\u2010Aryl\u20101,2\u2010Ethanediols to Methyl Ketones Driven by Eosin Y Fragmentation Products"],"prefix":"10.1002","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3066-7511","authenticated-orcid":false,"given":"Elina K.","family":"Taskinen","sequence":"first","affiliation":[{"name":"Department of Chemistry and Pharmacy University of Regensburg  Universit\u00e4tstr.\u200531 93053 Regensburg 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