Synthesis p. 524 - 526 (1997)
Update date:2022-08-11
Topics:
Paul, Gitendra C.
Gajewski, Joseph J.
Metallation of 9-bis(bromomethylene)-9H-fluorene with one equivalent of BuLi at -78°C followed by quenching with 6,6-dicyclopropylfulvene and subsequent warming (room temperature, 18 h) gave an adduct identified as compound 5 (~ 70% yield). Under identical conditions dimethylfulvene and cyclopropylmethylfulvene failed to give a similar adduct. Simple and efficient syntheses of 9-bromomethylene- and 9-bis(bromomethylene)-9H- fluorene are also described.
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