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Conventional cross\u2010coupling reactions frequently require activated electrophiles, produce unwanted byproducts, and involve complex purification procedures. Herein, we report a solid\u2010supported ruthenium catalyst that enables dehydrative allylic amination in water, directly converting allyl alcohols and amines into allylic amines. The 2\u2010mercaptopyridine\u2013ruthenium complex immobilized on an amphiphilic polymer efficiently catalyzed the reaction under mild aqueous conditions, producing only water as a byproduct. This method avoids halide\u2010based leaving groups, additives, and organic solvents, while addressing three key sustainability challenges in a single reaction system: solvent toxicity, waste generation, and purification complexity. Moreover, the catalyst was readily removed via filtration, eliminating the need for chromatographic purification. Given the significance of allylamines in medicinal chemistry, this environmentally benign strategy offers a practical step toward scalable green synthesis.<\/jats:p>","DOI":"10.1002\/cssc.70819","type":"journal-article","created":{"date-parts":[[2026,6,23]],"date-time":"2026-06-23T16:08:07Z","timestamp":1782230887000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Dehydrative Allylic Amination in Water via a Polymer\u2010Supported Ruthenium Catalyst"],"prefix":"10.1002","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7071-3642","authenticated-orcid":false,"given":"Shota","family":"Mizuno","sequence":"first","affiliation":[{"name":"Department of Chemistry and Biomolecular Science Faculty of Engineering Gifu University  Gifu Japan"},{"name":"Sagami Chemical Research Institute  Kanagawa Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yasuhiro","family":"Kubota","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biomolecular Science Faculty of Engineering Gifu University  Gifu Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Toshiyasu","family":"Inuzuka","sequence":"additional","affiliation":[{"name":"Division of Instrumental Analysis Life Science Research Center Gifu University  Gifu Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7880-6093","authenticated-orcid":false,"given":"Kazumasa","family":"Funabiki","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biomolecular Science Faculty of Engineering Gifu University  Gifu Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1154-5781","authenticated-orcid":false,"given":"Munenori","family":"Inoue","sequence":"additional","affiliation":[{"name":"Sagami Chemical Research Institute  Kanagawa Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,6,23]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1039\/B507207G"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.compchemeng.2008.01.006"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.oprd.6b00015"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1021\/cr00039a007"},{"key":"e_1_2_8_6_1","first-page":"279","volume-title":"Comprehensive Chirality","author":"Caron S.","year":"2011"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1002\/9783527611003"},{"key":"e_1_2_8_8_1","doi-asserted-by":"crossref","unstructured":"S.Abou\u2010Shehada J. 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