Multicatalytic Processes Using Diverse Transition Metals for the Synthesis of Alkenes

Hélène Lebel* and Valérie Paquet
Dpartement de chimie, Universit de Montral, C.P. 6128, Succursale Centre-ville, Montral, Qubec, Canada, H3C 3J7
J. Am. Chem. Soc., 2004, 126 (36), pp 11152–11153
DOI: 10.1021/ja0472681
Publication Date (Web): August 21, 2004
Copyright © 2004 American Chemical Society
*

In papers with more than one author, the asterisk indicates the name of the author to whom inquiries about the paper should be addressed.

, lebelhe@chimie.umontreal.ca

Abstract

Abstract Image

A series of cascade processes for the synthesis of alkenes from alcohols is described. Each individual step is catalyzed with a specific transition metal complex. The oxidation−methylenation one-pot procedure took place in the presence of a palladium and a rhodium catalyst to produce the desired terminal alkenes in high yields. A methylenation−ring-closing metathesis allowed the synthesis of cyclic alkenes from carbonyl derivatives, using the second-generation metathesis catalyst. Finally, an oxidation−methylenation−RCM process that involves up to three different transition metal catalysts in the same vessel is presented.

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History

  • Published In Issue September 15, 2004
  • Received May 10, 2004

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