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Building upon our recently reported copper catalysis that used simple\n                    <jats:italic>N<\/jats:italic>\n                    \u2010methoxyamides as radical precursors, we report a method to access diverse aza\u2010 and oxo\u2010heterocycles, including cyclic sulfonamides, cyclic ethers, and lactones of different ring sizes. By placing a heteroatom in the\n                    <jats:italic>N<\/jats:italic>\n                    \u2010methoxyamide substrate, the carbon radical formed at the \u03b3\u2010position from the intramolecular H\u2010abstraction by the amidyl radical could be trapped with the pendant heteroatom, leading to a redox\u2010neutral Cu\u2010catalyzed cyclative \u03b3\u2010C(sp\n                    <jats:sup>3<\/jats:sup>\n                    )\u2013H functionalization. The syntheses of a wide range of saturated aza\u2010 and oxo\u2010heterocycles demonstrate the versatility of this method.\n                  <\/jats:p>","DOI":"10.1002\/anie.202521635","type":"journal-article","created":{"date-parts":[[2026,1,9]],"date-time":"2026-01-09T05:28:55Z","timestamp":1767936535000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Redox\u2010Neutral Cu\u2010Catalyzed Cyclative \u03b3\u2010C\u2013H Functionalization Enroute to Aza\u2010 and Oxo\u2010heterocycles"],"prefix":"10.1002","volume":"65","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-4021-3865","authenticated-orcid":false,"given":"Zi\u2010Jun","family":"Zhang","sequence":"first","affiliation":[{"name":"Department of Chemistry The Scripps Research Institute  10550 North Torrey Pines Road La Jolla CA 92037 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3798-9732","authenticated-orcid":false,"given":"Shupeng","family":"Zhou","sequence":"additional","affiliation":[{"name":"Department of Chemistry The Scripps Research Institute  10550 North Torrey Pines Road La Jolla CA 92037 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3560-5774","authenticated-orcid":false,"given":"Jin\u2010Quan","family":"Yu","sequence":"additional","affiliation":[{"name":"Department of Chemistry The Scripps Research Institute  10550 North Torrey Pines Road La Jolla CA 92037 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,1,8]]},"reference":[{"key":"e_1_2_6_1_1","unstructured":"M.Ge J.He F. 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