Selective catalytic synthesis of functional allenes, cyclopentenones and oxolenes

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:250123

Darcel, C; Bruneau, C; Dixneuf, P H ^[1]

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1. Universite de Rennes (France)

The most powerful method to produce allene derivatives consists in the selective activation of prop-2-yn-1-carbonates by a Pd(0) catalyst, via allenyl palladium(II) intermediate. This strategy has been used for the selective catalytic synthesis of derivatives. The alkynyl cyclic carbonates have the advantage to be readily prepared directly from CO{sub 2} and contain both propargylic and homopropargylic functionalities. Their activation, under mild conditions, by palladium(0) catalysts, associated with the suitable phosphine ligand, can be oriented to selectively prepare either alkynyl {alpha}-hydroxy allenes, 5-hydroxy alka-2,3-dienoates, functional cyclopentenones or oxolenes via cross coupling, mono-carbonylation, dicarbonylation and Heck-Type reactions respectively.

• OSTI ID: 250123
• Report Number(s): CONF-9508100--
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
40 CHEMISTRY
ALKENES
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL PREPARATION
KETONES
ORGANIC OXYGEN COMPOUNDS
ORGANOMETALLIC COMPOUNDS
PALLADIUM COMPLEXES