✦ LIBER ✦

Synthesis and Structure of Allenyl-Substituted η6-Benzene(tricarbonyl)-chromium Complexes

✍ Scribed by Müller, Thomas J. J. ;Ansorge, Markus

Publisher: Wiley (John Wiley & Sons)
Year: 1997
Tongue: English
Weight: 624 KB
Volume: 130
Category: Article
ISSN: 0009-2940
DOI: 10.1002/cber.19971300816

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✦ Synopsis

Abstract

The Cr(CO)~3~‐complexed η6‐phenylpropargylic alcohols 3 react in a displacement rearrangement with thionyl chloride or chlorodiphenylphosphane to give the chloro‐ or phosphoryl allenyl substituted η6‐phenyl complexes 4 and 6, respectively. In the X‐ray crystal structure of the novel organometallic allenic derivatives 4b and 6b the vicinal chloro or phosphoryl substituent and the benzene(tricarbonyl)chromium fragment are arranged coplanarily. Palladium/copper‐catalyzed couplings of the chloroallene 4b with terminal alkynes disclose a facile access to ynallene derivatives 8, novel carbon‐rich organometallic π‐systems.

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