Okitsu T, Yoshikawa T, Morohashi M, Aoki K, Yakura T, Sakata K, Hatano M. Boron Trifluoride-Mediated Domino Dehydration/Electrophilic Cyclization of Silylalkynols Leading to 2,3-Fused Tricyclic Benzofulvenes.
Org Lett 2024;
26:1652-1656. [PMID:
38385717 DOI:
10.1021/acs.orglett.4c00123]
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Abstract
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·OH2 enables the electrophilic activation of alkynes. The predominant Z-selectivity of the reaction is also discussed.
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