One-carbon ring expansion reaction of heteroarenes involving typical dearomative cyclopropanation has gained wide attention in the past decade as it allows the facile synthesis of various valuable ring-expanded heterocycles. Herein, the authors report an enantioselective dearomative one-carbon ring expansion of benzofurans via vinyl cations formed by copper-catalyzed cyclization of diynes.
- Xin-Qi Zhu
- Zi-Wei Ge
- Long-Wu Ye