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Rhodium-Catalyzed Intramolecular Cyclization to Synthesize 2‑Aminobenzofurans via Carbene Metathesis Reactions
Herein, we report a new method of
synthesizing of 2-aminobenzofuran
3-enes via the formal C–S insertion reaction of alkyne-tethered
diazo compounds. Metal carbene, as a kind of active synthetic intermediate,
plays a very important role in organic synthesis. Through the carbene/alkyne
metathesis strategy, a new donor carbene is produced in situ as a
key intermediate, which has different reactions from the donor receptor
carbene