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Published March 16, 1998 | public
Journal Article

Synthesis of Unsaturated Nine-Membered Ring Ethers (Δ^3-Oxonenes) Containing a Z- or E-Configurated Double Bond: Thermodynamic versus Kinetic Control in Palladium-Catalyzed Allylic Cyclizations

Abstract

Double stereocontrol is achieved in the Pd‐catalyzed cyclization of Δ^3‐oxonene precursors (see reactions outlined below). The configuration of the olefinic double bond and of the allylic carbon center α to the ether oxygen atom is dictated by the configuration of the double bond in the starting compound (E/Z), the Pd ligand (dppe = Ph_2PCH_2CH_2PPh_2), and the reaction time.

Additional Information

© 1998 Wiley‐VCH Verlag GmbH, Weinheim, Fed. Rep. of Germany. Issue Online: 17 December 1998; Version of Record online: 17 December 1998; Manuscript received: 19 September 1998. This work was supported by the Fonds der Chemischen Industrie (PhD fellowships for J. P. and C. S.) and the Deutsche Forschungsgemeinschaft. We thank Dr. R. Wartchow, Institut für Anorganische Chemie der Universität Hannover, for the X-ray crystal structure analysis and Dr. J. M. Goodman, University of Cambridge, for calculations, and Degussa for a gift of palladium salts.

Additional details

Created:
August 22, 2023
Modified:
October 18, 2023