Fig. 2: One-carbon ring expansion reactions of heteroarenes.
From: Enantioselective dearomative single-atom skeletal editing of benzofurans
a One-carbon ring expansion of heteroarenes via metal carbenes. b One-carbon ring expansion of benzofuran for synthesis of 2H-chromene. c This work: asymmetric one-carbon ring expansion of benzofurans via vinyl cations for synthesis of chiral 2H-chromenes.
