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. Author manuscript; available in PMC: 2023 May 1.
Published in final edited form as: Nat Synth. 2022 Apr 11;1(5):352–364. doi: 10.1038/s44160-022-00052-1

Fig. 7 |. Select advances in single-atom ring expansions.

Fig. 7 |

a, Representative examples of oxidative ring expansions in benzylic alcohols56 (top) and amines57 (bottom). b, Photochemical ring expansion of pyridinium salts58. Expanded rings are highlighted in red for clarity. HFIP, hexafluoroisopropanol; Tf, trifluoromethanesulfonyl.