Boron Trifluoride-Mediated Domino Dehydration/Electrophilic Cyclization of Silylalkynols Leading to 2,3-Fused Tricyclic Benzofulvenes

Takashi Okitsu,Takeshi Yoshikawa, Mai Morohashi, Kokoro Aoki,Takayuki Yakura,Ken Sakata,Manabu Hatano

ORGANIC LETTERS（2024）

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摘要

A BF3-mediated domino dehydration/electrophilic cyclization of silylalkynols to form 2,3-fused tricyclic benzofulvenes was achieved. In the latter step, in situ generated BF3 center dot OH2 enables the electrophilic activation of alkynes. The predominant Z-selectivity of the reaction is also discussed. [GRAPHICS]

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