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We found that a metal\u2010free, Se\u2010catalyzed allylic C\u2212H amination provided an efficient method for PPM of polynorbornenes (PNBs) produced via ring\u2010opening metathesis polymerization. Inherent to the mechanism of the allylic amination, PPM on PNBs preserved the alkene functional groups along the polymer backbone, while also avoiding transposition of the double bonds. Amination using a series of aryl sulfonamides led to good control over the degree of functionalization, access to a range of functionalities, and tunable thermal properties from the resulting polymers.<\/jats:p>","DOI":"10.1002\/anie.202303174","type":"journal-article","created":{"date-parts":[[2023,3,21]],"date-time":"2023-03-21T17:10:00Z","timestamp":1679418600000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["C\u2212H Functionalization and Allylic Amination for Post\u2010Polymerization Modification of Polynorbornenes"],"prefix":"10.1002","volume":"62","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2426-5321","authenticated-orcid":false,"given":"Sean R.","family":"Gitter","sequence":"first","affiliation":[{"name":"Department of Chemistry University of Wisconsin  53706 Madison WI USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei 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