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Mixed anhydrides of carboxylic acids were prepared using isobutyl chloroformate and transformed to the corresponding KATs using a commercial copper catalyst, B\n                    <jats:sub>2<\/jats:sub>\n                    (pin)\n                    <jats:sub>2<\/jats:sub>\n                    , and aqueous KHF\n                    <jats:sub>2<\/jats:sub>\n                    . This method allows for the facile preparation of aliphatic, aromatic, and amino acid\u2010derived KATs and is compatible with a variety of functional groups including alkenes, esters, halides, nitriles, and protected amines.\n                  <\/jats:p>","DOI":"10.1002\/anie.202114513","type":"journal-article","created":{"date-parts":[[2021,12,15]],"date-time":"2021-12-15T07:51:27Z","timestamp":1639554687000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Preparation of Potassium Acyltrifluoroborates (KATs) from Carboxylic Acids by Copper\u2010Catalyzed Borylation of Mixed Anhydrides**"],"prefix":"10.1002","volume":"61","author":[{"given":"Pinku","family":"Tung","sequence":"first","affiliation":[{"name":"Department of Chemistry University of Illinois at Chicago  845\u2005W. 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