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We have devised a new procedure for synthesizing fulvenes from indene and fluorene using phase-transfer catalysis. Compounds synthesized include the benzhydrylidene derivatives of fluorene and indene and the benzylidene derivative of fluorene.Cyclopentadiene reacts readily with aldehydes and ketones in alkaline solution; indene reacts only under more stringent conditions; and fluorene reacts only as the Grignard, sodium, or lithium derivative (1, 2). By using solid sodium hydroxide and a phase-transfer catalyst, tetrabuty-

Includes synthesis of an aldehyde from a primary alcohol as well as several ketones from secondary alcohols.

No abstract

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