Chemistry Letters p. 863 - 866 (1987)
Update date:2022-08-03
Topics:
Murakami, Masashi
Tsuji, Takashi
Oda, Masafumi
Nishida, Shinya
Some methylcyclopropanes activated by a spiro-fused fluorene group were readily dehydrogenated by DDQ, but not by chloranil, to give a butadiene derivative, which reacted further with DDQ to afford 7-(o,o'-biphenylene)-3,4-dichloro-1,6-dicyano-9-alkyl-bicyclo<4.4.0>deca-3,8-diene-2,4-dione.In contrast, methylcyclopropanes substituted merely by two phenyl groups were reluctant to undergo the dehydrogenation.
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